{"title":"Crescendo Amplifiers","description":"\u003cdiv class=\"ai-collection-block ai-cat-amplifiers\"\u003e\n\n\u003ch2\u003eWhere Crescendo Sits\u003c\/h2\u003e\n\n\u003cp\u003eCrescendo's REVOLUTION line is built for sound quality first. The four-channel amps are high-bias Class AB with a pure amplifier design, no onboard crossovers or bass boost, so the signal path stays short and the tuning happens on a DSP where it belongs. The flagship 7A4 measures 0.0035% THD and a 110dB signal-to-noise ratio, with Burr Brown, Sanken and Elna parts inside. This is an SQ amplifier line, not a loudness line.\u003c\/p\u003e\n\n\u003cp\u003eThe naming is a tier and a channel count: the number is the tier, the A is the amplifier, the last digit is channels. So the ladder runs 3A4, 5A4 and 7A4 on the four-channel side, with two monoblocks underneath, the Class AB 5A1 for a refined sub stage and the Class D 3A1 when the build needs high-output bass.\u003c\/p\u003e\n\n\u003ch2\u003eThe Crescendo REVOLUTION Lineup, Spec by Spec\u003c\/h2\u003e\n\n\u003cp\u003eEvery new Crescendo amp we stock, with power and dimensions verified against the manufacturer. Multichannel power is per channel at 4 ohm with the 2 ohm figure in parentheses; the monoblocks show their rated load.\u003c\/p\u003e\n\n\u003cdiv class=\"ai-table-wrap\"\u003e\n\u003ctable class=\"ai-spec-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eChannels\u003c\/th\u003e\n\u003cth\u003eClass\u003c\/th\u003e\n\u003cth\u003ePower (RMS)\u003c\/th\u003e\n\u003cth\u003eDimensions L×W×H (in)\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eREVOLUTION 3A4\u003c\/td\u003e\n\u003ctd\u003e4-channel\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"ai-class-badge\"\u003eAB\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e4 × 70W @ 4Ω (110W @ 2Ω)\u003c\/td\u003e\n\u003ctd\u003e10.6 × 5.9 × 2.4\u003c\/td\u003e\n\u003ctd\u003e$499.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eREVOLUTION 3A1\u003c\/td\u003e\n\u003ctd\u003eMonoblock\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"ai-class-badge\"\u003eD\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e400W @ 4Ω \/ 600W @ 2Ω \/ 1000W @ 1Ω\u003c\/td\u003e\n\u003ctd\u003e10.6 × 5.9 × 2.4\u003c\/td\u003e\n\u003ctd\u003e$569.99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eREVOLUTION 5A1\u003c\/td\u003e\n\u003ctd\u003eMonoblock\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"ai-class-badge\"\u003eAB\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e450W @ 4Ω, 2Ω and 1Ω\u003c\/td\u003e\n\u003ctd\u003e10.6 × 5.9 × 2.4\u003c\/td\u003e\n\u003ctd\u003e$749.99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eREVOLUTION 5A4\u003c\/td\u003e\n\u003ctd\u003e4-channel\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"ai-class-badge\"\u003eAB\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e4 × 75W @ 4Ω (125W @ 2Ω)\u003c\/td\u003e\n\u003ctd\u003e10.6 × 5.9 × 2.4\u003c\/td\u003e\n\u003ctd\u003e$779.99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eREVOLUTION 7A4\u003c\/td\u003e\n\u003ctd\u003e4-channel\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"ai-class-badge\"\u003eAB\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e4 × 150W @ 4Ω (2 × 480W bridged)\u003c\/td\u003e\n\u003ctd\u003e14.17 × 8.46 × 2.13\u003c\/td\u003e\n\u003ctd\u003e$1,699.99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eThe 5A1 is the unusual one: 450W a channel held flat across 4, 2 and 1 ohm, so the sub sees the same power however you wire it. The 3A1 is the Class D high-output option, 1000W at 1 ohm. On the four-channel side, the 3A4, 5A4 and 7A4 step from 70W to 150W a channel. Each product page carries the full performance and component detail.\u003c\/p\u003e\n\n\u003ch3\u003eThe four-channel ladder: 3A4 to 7A4\u003c\/h3\u003e\n\u003cp\u003eThree high-bias Class AB four-channels for the front stage. The \u003cstrong\u003e3A4\u003c\/strong\u003e (4 x 70W) is the entry at $499, the \u003cstrong\u003e5A4\u003c\/strong\u003e (4 x 75W) adds 32-bit high-resolution support and a wider bandwidth, and the \u003cstrong\u003e7A4\u003c\/strong\u003e (4 x 150W) is the SQ flagship, a pure amplifier with Burr Brown, Sanken and Elna parts and 0.0035% THD. All three bridge to two channels for a sub. See \u003ca href=\"\/collections\/class-ab-amplifiers\"\u003eClass AB amplifiers\u003c\/a\u003e and \u003ca href=\"\/collections\/4-channel-amplifiers\"\u003e4-channel amplifiers\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eThe monoblocks: 5A1 and 3A1\u003c\/h3\u003e\n\u003cp\u003eTwo subwoofer amps for two different goals. The \u003cstrong\u003e5A1\u003c\/strong\u003e is Class AB, 450W held flat across every impedance, the refined choice for an SQ sub. The \u003cstrong\u003e3A1\u003c\/strong\u003e is Class D on the IRS2092S platform, 1000W at 1 ohm for high-output bass. See \u003ca href=\"\/collections\/monoblock-amplifier\"\u003emonoblock amplifiers\u003c\/a\u003e and \u003ca href=\"\/collections\/class-d-amplifiers\"\u003eClass D amplifiers\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003caside class=\"ai-callout-spec\"\u003e\n\u003cp class=\"ai-callout-label\"\u003ePure Amplifier Design, No Onboard Crossovers\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ai-spec-key\"\u003eThe REVOLUTION four-channels are pure amplifiers: RCA in, level control, speaker out, and no built-in crossover or EQ.\u003c\/span\u003e That keeps the signal path short and the noise floor low, which is the whole point of an SQ amp. \u003cspan class=\"ai-spec-key\"\u003eIt also means the crossover and tuning have to live on a DSP\u003c\/span\u003e, so plan one into the build.\u003c\/p\u003e\n\u003c\/aside\u003e\n\n\u003cp\u003eAn SQ amp earns a signal chain to match. The drivers live in \u003ca href=\"\/collections\/component-sets\"\u003ecomponent sets\u003c\/a\u003e and \u003ca href=\"\/collections\/car-subwoofers\"\u003ecar subwoofers\u003c\/a\u003e, the crossover and time alignment belong to a \u003ca href=\"\/collections\/digital-sound-processor\"\u003eDSP\u003c\/a\u003e, and gain is what protects all of it: \u003ca href=\"\/blogs\/car-amplifiers\/how-to-set-amplifier-gain-a-practical-step-by-step-guide\"\u003ehow we set amplifier gain\u003c\/a\u003e. See the full range in the \u003ca href=\"\/collections\/car-amplifiers\"\u003eamplifier lineup\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003caside class=\"ai-callout-cta\"\u003e\n\u003cp class=\"ai-callout-label\"\u003eBuilding an SQ System Around Crescendo?\u003c\/p\u003e\n\u003cp\u003eTell us the drivers and whether you are running a DSP, and we will tell you which REVOLUTION amp matches the stage and the impedance, before you buy. \u003ca href=\"\/pages\/contact-us\"\u003eContact us\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"ai-contact-phone\"\u003e707-999-3071\u003c\/span\u003e\u003cspan class=\"ai-contact-divider\"\u003e|\u003c\/span\u003e\u003cspan class=\"ai-contact-email\"\u003econtact@audiointensity.com\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/aside\u003e\n\n\u003cdiv class=\"ai-faq-section\"\u003e\n\n\u003ch2\u003eFrequently Asked Crescendo Amplifier Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat is Crescendo known for?\u003c\/h3\u003e\n\u003cp\u003eSound-quality amplifiers. The REVOLUTION four-channels are high-bias Class AB with a pure amplifier design and no onboard crossovers, built for a low noise floor and an accurate front stage. The flagship 7A4 measures 0.0035% THD and 110dB signal-to-noise with Burr Brown, Sanken and Elna parts. The line also includes two subwoofer monoblocks, one Class AB and one Class D.\u003c\/p\u003e\n\n\u003ch3\u003eAre Crescendo amps Class AB or Class D?\u003c\/h3\u003e\n\u003cp\u003eBoth, depending on the model. The four-channel 3A4, 5A4 and 7A4 and the 5A1 monoblock are high-bias Class AB, the topology an SQ front stage and a refined sub reward. The 3A1 monoblock is Class D on the IRS2092S platform for high-output bass. Older references calling the whole line Class D are wrong: four of the five REVOLUTION amps are Class AB.\u003c\/p\u003e\n\n\u003ch3\u003eDo Crescendo amps have built-in crossovers?\u003c\/h3\u003e\n\u003cp\u003eNo, and that is deliberate. The REVOLUTION four-channels are pure amplifiers: RCA input, level control, speaker output, no crossover or EQ in the signal path. That keeps the path short and the noise floor low. The tradeoff is that the crossover and tuning have to come from a DSP, so plan one into the system.\u003c\/p\u003e\n\n\u003ch3\u003eWhich Crescendo amp do I use for a subwoofer?\u003c\/h3\u003e\n\u003cp\u003eOne of the two monoblocks, matched to the goal. The 5A1 is Class AB and holds 450W flat across 4, 2 and 1 ohm, the refined choice for an SQ sub. The 3A1 is Class D and makes 1000W at 1 ohm for high-output bass. A four-channel can also be bridged to two channels for a sub. Match the amp's power at your wired impedance to the driver's RMS rating.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the difference between the 3A4, 5A4 and 7A4?\u003c\/h3\u003e\n\u003cp\u003ePower and refinement up the ladder. The 3A4 is 4 x 70W at $499. The 5A4 is 4 x 75W with 32-bit high-resolution support and a wider bandwidth. The 7A4 is the flagship at 4 x 150W, a pure SQ amplifier with Burr Brown and Sanken parts, the lowest distortion in the line and a larger chassis. All three are high-bias Class AB.\u003c\/p\u003e\n\n\u003ch3\u003eDo I need a DSP with a Crescendo amp?\u003c\/h3\u003e\n\u003cp\u003eFor the four-channels, effectively yes. Because they have no onboard crossover, the high-pass, low-pass and time alignment for the front stage have to come from a DSP or a source unit with those controls. That is normal for an SQ build and it is where these amps are meant to live. The monoblocks are simpler and run a sub directly.\u003c\/p\u003e\n\n\u003ch3\u003eAre these new with manufacturer warranty?\u003c\/h3\u003e\n\u003cp\u003eYes. Every Crescendo amplifier is brand new, sold by an authorized dealer, and carries the full manufacturer warranty. We handle warranty claims directly with the brand.\u003c\/p\u003e\n\n\u003c\/div\u003e\n\n\u003c\/div\u003e","products":[{"product_id":"crescendo-revolution-7a4-4-channel-amplifier","title":"Crescendo REVOLUTION 7A4 4 Channel Amplifier","description":"\u003cdiv class=\"cr-desc\"\u003e\n\u003cstyle\u003e\n  .cr-desc {\n    --cr-black: #0d0d0f;\n    --cr-charcoal: #1c1c21;\n    --cr-slate: #2a2a31;\n    --cr-orange: #f97316;\n    --cr-orange-deep: #c2410c;\n    --cr-tint: #faf6f1;\n    --cr-line: #ece4da;\n    --cr-text: #1f1f23;\n    --cr-muted: #55555e;\n    max-width: 1200px;\n    margin: 0 auto;\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: var(--cr-text);\n    line-height: 1.6;\n  }\n  .cr-desc * { box-sizing: border-box; }\n  .cr-hero {\n    background: linear-gradient(135deg, var(--cr-black) 0%, var(--cr-charcoal) 60%, var(--cr-slate) 100%);\n    color: #fff;\n    padding: 56px 44px;\n    border-radius: 14px;\n    text-align: center;\n    border-bottom: 4px solid var(--cr-orange);\n  }\n  .cr-hero .cr-eyebrow {\n    display: inline-block;\n    font-size: 13px;\n    letter-spacing: 2.5px;\n    text-transform: uppercase;\n    color: var(--cr-orange);\n    font-weight: 700;\n    margin-bottom: 16px;\n  }\n  .cr-hero h2 {\n    font-size: 34px;\n    line-height: 1.2;\n    margin: 0 0 14px;\n    color: #fff;\n    font-weight: 800;\n  }\n  .cr-hero p {\n    font-size: 18px;\n    color: #d8d8de;\n    max-width: 760px;\n    margin: 0 auto;\n  }\n  .cr-section {\n    background: #ffffff;\n    padding: 40px 44px;\n    margin-top: 26px;\n    border-radius: 14px;\n    border: 1px solid var(--cr-line);\n  }\n  .cr-section.tint { background: var(--cr-tint); }\n  .cr-section h3 {\n    font-size: 25px;\n    margin: 0 0 18px;\n    color: var(--cr-black);\n    font-weight: 800;\n  }\n  .cr-section p {\n    font-size: 16.5px;\n    color: var(--cr-text);\n    margin: 0 0 16px;\n  }\n  .cr-section p:last-child { margin-bottom: 0; }\n  .cr-highlight {\n    border-left: 4px solid var(--cr-orange);\n    background: #fff7ef;\n    padding: 20px 24px;\n    border-radius: 0 10px 10px 0;\n    margin: 22px 0 0;\n  }\n  .cr-highlight p { margin: 0; font-size: 16px; }\n  .cr-grid {\n    display: grid;\n    grid-template-columns: 1fr 1fr;\n    gap: 20px;\n    margin-top: 24px;\n  }\n  @media (max-width: 720px) { .cr-grid { grid-template-columns: 1fr; } }\n  .cr-card {\n    background: #ffffff;\n    border: 1px solid var(--cr-line);\n    border-radius: 12px;\n    padding: 26px;\n  }\n  .cr-card-label {\n    display: inline-block;\n    font-size: 11.5px;\n    letter-spacing: 1.5px;\n    text-transform: uppercase;\n    color: var(--cr-orange-deep);\n    font-weight: 700;\n    margin-bottom: 10px;\n  }\n  .cr-card h4 {\n    font-size: 18.5px;\n    margin: 0 0 12px;\n    color: var(--cr-black);\n    font-weight: 700;\n  }\n  .cr-card-divider {\n    width: 42px;\n    height: 3px;\n    background: var(--cr-orange);\n    border-radius: 2px;\n    margin: 0 0 14px;\n  }\n  .cr-card p { font-size: 15.5px; color: var(--cr-muted); margin: 0; }\n  .cr-power {\n    display: grid;\n    grid-template-columns: repeat(3, 1fr);\n    gap: 16px;\n    margin-top: 22px;\n  }\n  @media (max-width: 720px) { .cr-power { grid-template-columns: 1fr; } }\n  .cr-power-cell {\n    background: linear-gradient(160deg, var(--cr-charcoal), var(--cr-black));\n    color: #fff;\n    border-radius: 12px;\n    padding: 24px 20px;\n    text-align: center;\n    border-top: 3px solid var(--cr-orange);\n  }\n  .cr-power-cell .num {\n    display: block;\n    font-size: 30px;\n    font-weight: 800;\n    line-height: 1.1;\n  }\n  .cr-power-cell .unit {\n    display: block;\n    font-size: 13px;\n    letter-spacing: 1px;\n    text-transform: uppercase;\n    color: var(--cr-orange);\n    margin-top: 8px;\n  }\n  .cr-cta {\n    background: linear-gradient(135deg, var(--cr-slate) 0%, var(--cr-charcoal) 50%, var(--cr-black) 100%);\n    color: #fff;\n    padding: 44px;\n    border-radius: 14px;\n    text-align: center;\n    margin-top: 26px;\n    border-top: 4px solid var(--cr-orange);\n  }\n  .cr-cta h3 { color: #fff; font-size: 24px; margin: 0 0 12px; font-weight: 800; }\n  .cr-cta p { color: #d8d8de; font-size: 16.5px; margin: 0 auto; max-width: 680px; }\n\u003c\/style\u003e\n\n  \u003cdiv class=\"cr-hero\"\u003e\n    \u003cspan class=\"cr-eyebrow\"\u003eCrescendo Revolution Series Flagship\u003c\/span\u003e\n    \u003ch2\u003eRevolution 7A4 | 4-Channel Reference Amplifier\u003c\/h2\u003e\n    \u003cp\u003ePure amplification, zero coloration. The flagship Revolution 7A4 pairs Class AB High Bias power with an audio-grade signal path built on Burr Brown chips and Elna capacitors, for sound that is neutral, controlled, and refined at every level.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-section\"\u003e\n    \u003ch3\u003eFlagship Power With Reference Manners\u003c\/h3\u003e\n    \u003cp\u003eThe Revolution 7A4 delivers 150 watts per channel at 4 ohms, 240 watts per channel at 2 ohms, and 480 watts per channel bridged at 4 ohms, all rated at 14.4 volts with a 2-ohm minimum load. That is serious authority for an audiophile amplifier: enough to run a full high-end active front stage, or to bridge into a pair of demanding midbass drivers without strain.\u003c\/p\u003e\n    \u003cp\u003eThe measurements are where the flagship earns its place. Total harmonic distortion is 0.0035% at 1 watt across the audible band, signal-to-noise reaches 110 dBA at rated power (97 dBA by the CEA-2006 1-watt standard), and frequency response spans 5 Hz to 100 kHz measured at -0.5 dB, a far stricter window than the -3 dB figure most amplifiers quote.\u003c\/p\u003e\n    \u003cdiv class=\"cr-power\"\u003e\n      \u003cdiv class=\"cr-power-cell\"\u003e\n\u003cspan class=\"num\"\u003e150W x 4\u003c\/span\u003e\u003cspan class=\"unit\"\u003eRMS at 4 Ohms\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"cr-power-cell\"\u003e\n\u003cspan class=\"num\"\u003e240W x 4\u003c\/span\u003e\u003cspan class=\"unit\"\u003eRMS at 2 Ohms\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"cr-power-cell\"\u003e\n\u003cspan class=\"num\"\u003e480W x 2\u003c\/span\u003e\u003cspan class=\"unit\"\u003eBridged at 4 Ohms\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-section tint\"\u003e\n    \u003ch3\u003eAn Audio-Grade Signal Path\u003c\/h3\u003e\n    \u003cp\u003eCrescendo built the 7A4's signal path from components chosen for transparency. Burr Brown chips handle the preamp stage and Elna audio-grade capacitors sit in the signal path, a combination found in high-end home audio far more often than in a car amplifier. The dual symmetrical power supply eliminates noise and provides the dynamic headroom that keeps complex passages composed, and all four channels are individually calibrated for matched, accurate output across the soundstage.\u003c\/p\u003e\n    \u003cp\u003eFor the purist, the 7A4 includes a preamplifier bypass option that routes the signal past the input gain stage entirely. Feed it a properly leveled signal from a high-output processor and the path from RCA to output stage gets even shorter.\u003c\/p\u003e\n    \u003cdiv class=\"cr-highlight\"\u003e\n      \u003cp\u003eLike every Revolution amplifier, the 7A4 carries no onboard filter. Crossover, time alignment, and EQ belong in your DSP; the 7A4's job is to amplify the result without editorializing. Paired with a Goldhorn processor, this is a reference-grade signal chain.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-section\"\u003e\n    \u003ch3\u003eBuilt Like the Flagship It Is\u003c\/h3\u003e\n    \u003cp\u003eThe 7A4 measures 360 by 215 by 54 millimeters (14.2 by 8.5 by 2.1 inches) and weighs a substantial 4.5 kilograms (9.9 pounds), most of it heatsink and power supply. The black and silver chassis keeps a low 2.1-inch profile for clean rack integration, onboard fusing is 2 x 50 amps, and protection covers thermal and short circuit conditions. Working voltage spans 10 to 16 volts, and input sensitivity adjusts from 900 mV to 5 V into a 10 kilohm input impedance.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-grid\"\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003eTopology\u003c\/span\u003e\n      \u003ch4\u003eClass AB High Bias\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eOutput stage biased toward Class A operation for linearity and detail at every listening level, with flagship power behind it.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003eComponents\u003c\/span\u003e\n      \u003ch4\u003eBurr Brown + Elna\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eAudio-grade preamp chips and capacitors selected for transparency, in a signal path built like high-end home audio.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003ePower Supply\u003c\/span\u003e\n      \u003ch4\u003eDual Symmetrical Design\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eEliminates noise and delivers the dynamic headroom that keeps demanding passages composed at volume.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003ePrecision\u003c\/span\u003e\n      \u003ch4\u003eIndividually Balanced Channels\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eAll four channels are individually calibrated for matched output, so the soundstage stays accurate left to right.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003ePurist Path\u003c\/span\u003e\n      \u003ch4\u003ePreamplifier Bypass\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eRoute past the input gain stage entirely when feeding a high-output processor, shortening the signal path further.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003eMeasurements\u003c\/span\u003e\n      \u003ch4\u003e0.0035% THD, -0.5dB Bandwidth\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003e5 Hz to 100 kHz at a strict -0.5 dB window with 110 dBA signal-to-noise. Reference numbers, not marketing numbers.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-cta\"\u003e\n    \u003ch3\u003eThe Reference Front Stage Starts Here\u003c\/h3\u003e\n    \u003cp\u003eThe Revolution 7A4 is the amplifier for systems where the goal is the truth of the recording: flagship power, an audio-grade signal path, and measurements that read like home audio. Pure amplification, zero coloration.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Crescendo","offers":[{"title":"Default Title","offer_id":42442883891289,"sku":"REVOLUTION 7A4","price":1699.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/crescendo-revolution-7a4-4-channel-amplifieramplifiercrescendo-1358271.webp?v=1772499912"},{"product_id":"crescendo-revolution-5a1-1-channel-amplifier","title":"Crescendo REVOLUTION 5A1 1 Channel Amplifier","description":"\u003cdiv class=\"cr-desc\"\u003e\n\u003cstyle\u003e\n  .cr-desc {\n    --cr-black: #0d0d0f;\n    --cr-charcoal: #1c1c21;\n    --cr-slate: #2a2a31;\n    --cr-orange: #f97316;\n    --cr-orange-deep: #c2410c;\n    --cr-tint: #faf6f1;\n    --cr-line: #ece4da;\n    --cr-text: #1f1f23;\n    --cr-muted: #55555e;\n    max-width: 1200px;\n    margin: 0 auto;\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: var(--cr-text);\n    line-height: 1.6;\n  }\n  .cr-desc * { box-sizing: border-box; }\n  .cr-hero {\n    background: linear-gradient(135deg, var(--cr-black) 0%, var(--cr-charcoal) 60%, var(--cr-slate) 100%);\n    color: #fff;\n    padding: 56px 44px;\n    border-radius: 14px;\n    text-align: center;\n    border-bottom: 4px solid var(--cr-orange);\n  }\n  .cr-hero .cr-eyebrow {\n    display: inline-block;\n    font-size: 13px;\n    letter-spacing: 2.5px;\n    text-transform: uppercase;\n    color: var(--cr-orange);\n    font-weight: 700;\n    margin-bottom: 16px;\n  }\n  .cr-hero h2 {\n    font-size: 34px;\n    line-height: 1.2;\n    margin: 0 0 14px;\n    color: #fff;\n    font-weight: 800;\n  }\n  .cr-hero p {\n    font-size: 18px;\n    color: #d8d8de;\n    max-width: 760px;\n    margin: 0 auto;\n  }\n  .cr-section {\n    background: #ffffff;\n    padding: 40px 44px;\n    margin-top: 26px;\n    border-radius: 14px;\n    border: 1px solid var(--cr-line);\n  }\n  .cr-section.tint { background: var(--cr-tint); }\n  .cr-section h3 {\n    font-size: 25px;\n    margin: 0 0 18px;\n    color: var(--cr-black);\n    font-weight: 800;\n  }\n  .cr-section p {\n    font-size: 16.5px;\n    color: var(--cr-text);\n    margin: 0 0 16px;\n  }\n  .cr-section p:last-child { margin-bottom: 0; }\n  .cr-highlight {\n    border-left: 4px solid var(--cr-orange);\n    background: #fff7ef;\n    padding: 20px 24px;\n    border-radius: 0 10px 10px 0;\n    margin: 22px 0 0;\n  }\n  .cr-highlight p { margin: 0; font-size: 16px; }\n  .cr-grid {\n    display: grid;\n    grid-template-columns: 1fr 1fr;\n    gap: 20px;\n    margin-top: 24px;\n  }\n  @media (max-width: 720px) { .cr-grid { grid-template-columns: 1fr; } }\n  .cr-card {\n    background: #ffffff;\n    border: 1px solid var(--cr-line);\n    border-radius: 12px;\n    padding: 26px;\n  }\n  .cr-card-label {\n    display: inline-block;\n    font-size: 11.5px;\n    letter-spacing: 1.5px;\n    text-transform: uppercase;\n    color: var(--cr-orange-deep);\n    font-weight: 700;\n    margin-bottom: 10px;\n  }\n  .cr-card h4 {\n    font-size: 18.5px;\n    margin: 0 0 12px;\n    color: var(--cr-black);\n    font-weight: 700;\n  }\n  .cr-card-divider {\n    width: 42px;\n    height: 3px;\n    background: var(--cr-orange);\n    border-radius: 2px;\n    margin: 0 0 14px;\n  }\n  .cr-card p { font-size: 15.5px; color: var(--cr-muted); margin: 0; }\n  .cr-power {\n    display: grid;\n    grid-template-columns: repeat(3, 1fr);\n    gap: 16px;\n    margin-top: 22px;\n  }\n  @media (max-width: 720px) { .cr-power { grid-template-columns: 1fr; } }\n  .cr-power-cell {\n    background: linear-gradient(160deg, var(--cr-charcoal), var(--cr-black));\n    color: #fff;\n    border-radius: 12px;\n    padding: 24px 20px;\n    text-align: center;\n    border-top: 3px solid var(--cr-orange);\n  }\n  .cr-power-cell .num {\n    display: block;\n    font-size: 30px;\n    font-weight: 800;\n    line-height: 1.1;\n  }\n  .cr-power-cell .unit {\n    display: block;\n    font-size: 13px;\n    letter-spacing: 1px;\n    text-transform: uppercase;\n    color: var(--cr-orange);\n    margin-top: 8px;\n  }\n  .cr-cta {\n    background: linear-gradient(135deg, var(--cr-slate) 0%, var(--cr-charcoal) 50%, var(--cr-black) 100%);\n    color: #fff;\n    padding: 44px;\n    border-radius: 14px;\n    text-align: center;\n    margin-top: 26px;\n    border-top: 4px solid var(--cr-orange);\n  }\n  .cr-cta h3 { color: #fff; font-size: 24px; margin: 0 0 12px; font-weight: 800; }\n  .cr-cta p { color: #d8d8de; font-size: 16.5px; margin: 0 auto; max-width: 680px; }\n\u003c\/style\u003e\n\n  \u003cdiv class=\"cr-hero\"\u003e\n    \u003cspan class=\"cr-eyebrow\"\u003eCrescendo Revolution Series\u003c\/span\u003e\n    \u003ch2\u003eRevolution 5A1 | 450 Watt Monoblock Amplifier\u003c\/h2\u003e\n    \u003cp\u003eStable power, absolute control. A Class AB monoblock that delivers the same 450 watts at 4, 2, or 1 ohm, with a noise floor and damping factor that put it in reference territory.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-section\"\u003e\n    \u003ch3\u003eOne Power Number, Every Load\u003c\/h3\u003e\n    \u003cp\u003eMost amplifiers make you chase impedance to find their power. The Revolution 5A1 makes the question irrelevant: 450 watts per channel at 4 ohms, 450 watts at 2 ohms, and 450 watts at 1 ohm, all rated at 14.4 volts. Whether you are running a single subwoofer, a high-output midbass, or a complex wiring configuration down to a 1-ohm minimum load, the output does not move. System planning becomes simple because the power is a constant, not a variable.\u003c\/p\u003e\n    \u003cdiv class=\"cr-power\"\u003e\n      \u003cdiv class=\"cr-power-cell\"\u003e\n\u003cspan class=\"num\"\u003e450W\u003c\/span\u003e\u003cspan class=\"unit\"\u003eat 4 Ohms\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"cr-power-cell\"\u003e\n\u003cspan class=\"num\"\u003e450W\u003c\/span\u003e\u003cspan class=\"unit\"\u003eat 2 Ohms\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"cr-power-cell\"\u003e\n\u003cspan class=\"num\"\u003e450W\u003c\/span\u003e\u003cspan class=\"unit\"\u003eat 1 Ohm\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-section tint\"\u003e\n    \u003ch3\u003eReference-Level Measurements\u003c\/h3\u003e\n    \u003cp\u003eThe 5A1's spec sheet reads like home audio, not car audio. Total harmonic distortion measures 0.04% at 1 watt across 20 Hz to 20 kHz. Signal-to-noise ratio reaches 122 dB at rated power (95.4 dBA by the CEA-2006 1-watt standard). The effective damping factor exceeds 500 from 20 Hz to 20 kHz, which is the grip that keeps a subwoofer cone doing exactly what the signal says and nothing more.\u003c\/p\u003e\n    \u003cp\u003eFrequency response extends from 4 Hz to 80 kHz at -3 dB, so while the 5A1 excels on subwoofer duty, it is a genuinely full-range amplifier. The Class AB design delivers clean, dynamic reproduction across the entire spectrum, with the high-resolution character the Revolution series is built around.\u003c\/p\u003e\n    \u003cdiv class=\"cr-highlight\"\u003e\n      \u003cp\u003eLike the rest of the Revolution series, the 5A1 carries no onboard filter. It is a pure power amplifier designed to take a processed signal from your DSP and amplify it without coloration.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-section\"\u003e\n    \u003ch3\u003eCompact, Fused, and Ready to Work\u003c\/h3\u003e\n    \u003cp\u003eThe brushed grey aluminum chassis measures 270 by 150 by 60 millimeters (10.6 by 5.9 by 2.4 inches) at 2.3 kilograms (5.1 pounds), the same compact Revolution footprint that mounts cleanly in show builds and tight spaces alike. Onboard fusing is handled by two 30-amp fuses, and protection covers thermal and short circuit conditions.\u003c\/p\u003e\n    \u003cp\u003eInput sensitivity adjusts from 1.5 V to 7.5 V into a 25 kilohm input impedance, matched to the higher output levels of quality processors so the amplifier's full signal-to-noise advantage is preserved through the gain structure.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-grid\"\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003ePower Delivery\u003c\/span\u003e\n      \u003ch4\u003eConstant 450W to 1 Ohm\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eIdentical output at 4, 2, or 1 ohm, so wiring configuration never costs you power or changes the plan.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003eControl\u003c\/span\u003e\n      \u003ch4\u003eDamping Factor Above 500\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eExceptional grip on the driver from 20 Hz to 20 kHz, for tight, accurate bass with controlled cone motion.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003eNoise Floor\u003c\/span\u003e\n      \u003ch4\u003e122 dB Signal-to-Noise\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eWith 0.04% THD at 1 watt, detail emerges from a silent background even at low listening levels.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003eBandwidth\u003c\/span\u003e\n      \u003ch4\u003e4 Hz to 80 kHz\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eTrue full-range response in a monoblock, equally at home on a reference sub stage or a dedicated midbass.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003ePhilosophy\u003c\/span\u003e\n      \u003ch4\u003ePure Amplifier, No Filter\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eNo onboard crossover or bass boost. The DSP processes, the 5A1 amplifies, and the signal stays untouched.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003eBuild\u003c\/span\u003e\n      \u003ch4\u003eCompact and Fused\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003e10.6 by 5.9 by 2.4 inch brushed grey chassis with onboard 2 x 30A fusing and thermal and short circuit protection.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-cta\"\u003e\n    \u003ch3\u003eStable Power. Absolute Control.\u003c\/h3\u003e\n    \u003cp\u003eThe Revolution 5A1 delivers one honest number at every load and the measurements to back it up. For a reference subwoofer stage or a hard-working midbass channel, this is Class AB done without compromise.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Crescendo","offers":[{"title":"Default Title","offer_id":42442885234777,"sku":"REVOLUTION 5A1","price":749.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/crescendo-revolution-5a1-1-channel-amplifieramplifiercrescendo-7536101.webp?v=1772499910"},{"product_id":"crescendo-revolution-5a4-4-channel-amplifier","title":"Crescendo REVOLUTION 5A4 4 channel Amplifier","description":"\u003cdiv class=\"cr-desc\"\u003e\n\u003cstyle\u003e\n  .cr-desc {\n    --cr-black: #0d0d0f;\n    --cr-charcoal: #1c1c21;\n    --cr-slate: #2a2a31;\n    --cr-orange: #f97316;\n    --cr-orange-deep: #c2410c;\n    --cr-tint: #faf6f1;\n    --cr-line: #ece4da;\n    --cr-text: #1f1f23;\n    --cr-muted: #55555e;\n    max-width: 1200px;\n    margin: 0 auto;\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n    color: var(--cr-text);\n    line-height: 1.6;\n  }\n  .cr-desc * { box-sizing: border-box; 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font-size: 24px; margin: 0 0 12px; font-weight: 800; }\n  .cr-cta p { color: #d8d8de; font-size: 16.5px; margin: 0 auto; max-width: 680px; }\n\u003c\/style\u003e\n\n  \u003cdiv class=\"cr-hero\"\u003e\n    \u003cspan class=\"cr-eyebrow\"\u003eCrescendo Revolution Series\u003c\/span\u003e\n    \u003ch2\u003eRevolution 5A4 | 4-Channel SQ Amplifier\u003c\/h2\u003e\n    \u003cp\u003eA pure Class AB High Bias power amplifier built for sound quality competition. No crossovers, no coloration, no shortcuts. Just full-bodied, articulate amplification that separates winning systems from the rest.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-section\"\u003e\n    \u003ch3\u003eCompetition-Grade Power, Honestly Rated\u003c\/h3\u003e\n    \u003cp\u003eThe Revolution 5A4 delivers 75 watts per channel at 4 ohms, 125 watts per channel at 2 ohms, and 210 watts per channel bridged at 4 ohms, all rated at 14.4 volts. That is real Class AB High Bias power with the dynamic headroom to render full-bodied vocals and articulate detail at competition judging levels, with a minimum speaker load of 2 ohms.\u003c\/p\u003e\n    \u003cp\u003eThe numbers behind the power tell the SQ story: 0.08% total harmonic distortion at 1 watt across the audible band, a 108 dB signal-to-noise ratio at rated power, channel separation of 58 dB, and an effective damping factor above 150 from 20 Hz to 20 kHz for tight, controlled driver behavior.\u003c\/p\u003e\n    \u003cdiv class=\"cr-power\"\u003e\n      \u003cdiv class=\"cr-power-cell\"\u003e\n\u003cspan class=\"num\"\u003e75W x 4\u003c\/span\u003e\u003cspan class=\"unit\"\u003eRMS at 4 Ohms\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"cr-power-cell\"\u003e\n\u003cspan class=\"num\"\u003e125W x 4\u003c\/span\u003e\u003cspan class=\"unit\"\u003eRMS at 2 Ohms\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"cr-power-cell\"\u003e\n\u003cspan class=\"num\"\u003e210W x 2\u003c\/span\u003e\u003cspan class=\"unit\"\u003eBridged at 4 Ohms\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-section tint\"\u003e\n    \u003ch3\u003eA Pure Amplifier, Built for DSP Systems\u003c\/h3\u003e\n    \u003cp\u003eThe Revolution 5A4 deliberately omits onboard crossovers and bass boost. In a modern SQ build, filtering, time alignment, and EQ belong in the DSP, and anything the amplifier adds to the signal path is something the processor has to fight. By keeping the signal path pure, the 5A4 hands your DSP exactly what it sent: nothing added, nothing subtracted, amplified with authority.\u003c\/p\u003e\n    \u003cp\u003eThe high-resolution signal path carries a frequency response of 7 Hz to 40 kHz at -3 dB, preserving the detail and spatial information in high-resolution sources that narrower amplifiers leave behind. Input sensitivity adjusts from 350 mV to 5 V with a 20 kilohm input impedance, matching cleanly to virtually any processor output.\u003c\/p\u003e\n    \u003cdiv class=\"cr-highlight\"\u003e\n      \u003cp\u003ePair the Revolution 5A4 with a quality DSP such as a Goldhorn processor and the amplifier becomes the foundation of a true competition signal chain: processing handled digitally, power delivered purely.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-section\"\u003e\n    \u003ch3\u003eClass AB High Bias: The SQ Topology\u003c\/h3\u003e\n    \u003cp\u003eThe 5A4 runs a high-bias Class AB output stage, holding the output devices closer to Class A operation than conventional AB designs. The benefit is linearity: lower crossover distortion, better behavior at low listening levels where detail usually disappears, and the refined, dynamic musical character that SQ judges reward.\u003c\/p\u003e\n    \u003cp\u003eThe brushed grey aluminum chassis measures 270 by 150 by 60 millimeters (10.6 by 5.9 by 2.4 inches) at 2.1 kilograms (4.6 pounds), compact enough to mount cleanly in a show build. Protection covers thermal and short circuit conditions. Note that the 5A4 has no onboard fuse, so external fusing at the battery and near the amplifier is required, exactly as a serious installer would plan anyway.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-grid\"\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003eTopology\u003c\/span\u003e\n      \u003ch4\u003eClass AB High Bias\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eOutput stage biased toward Class A operation for lower crossover distortion and full detail at low listening levels.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003eSignal Path\u003c\/span\u003e\n      \u003ch4\u003eHigh-Resolution by Design\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003e7 Hz to 40 kHz response preserves every detail in high-resolution sources, with 0.08% THD and 108 dB S\/N.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003ePhilosophy\u003c\/span\u003e\n      \u003ch4\u003eNo Crossovers, No Coloration\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eA pure power amplifier that leaves filtering and EQ to the DSP, where they belong in a modern SQ build.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003eControl\u003c\/span\u003e\n      \u003ch4\u003eDamping Factor Above 150\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003eEffective damping from 20 Hz to 20 kHz keeps drivers controlled, for the impactful, precise sound competition demands.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003eFlexibility\u003c\/span\u003e\n      \u003ch4\u003e2-Ohm Stable, Bridgeable\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003e125 watts per channel at 2 ohms or 210 watts x 2 bridged at 4 ohms, with input sensitivity from 350 mV to 5 V.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"cr-card\"\u003e\n      \u003cspan class=\"cr-card-label\"\u003eBuild\u003c\/span\u003e\n      \u003ch4\u003eCompact Brushed Aluminum\u003c\/h4\u003e\n      \u003cdiv class=\"cr-card-divider\"\u003e\u003c\/div\u003e\n      \u003cp\u003e10.6 by 5.9 by 2.4 inch brushed grey chassis with thermal and short circuit protection, sized for clean show installs.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"cr-cta\"\u003e\n    \u003ch3\u003eThe Foundation of a Winning System\u003c\/h3\u003e\n    \u003cp\u003eThe Revolution 5A4 does one thing without compromise: amplify. Give it a clean signal from your processor and it delivers the headroom, control, and refinement that put systems on podiums.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Crescendo","offers":[{"title":"Default Title","offer_id":42442886316121,"sku":"5A4","price":779.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/SpecificationAmplifierRevolution5A4B_01.avif?v=1780522314"},{"product_id":"crescendo-revolution-3a4-4-channel-amplifier","title":"Crescendo REVOLUTION 3A4 4 channel Amplifier","description":"\u003cp class=\"text-lg mb-6 leading-relaxed\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCrescendo REVOLUTION 3A4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erepresents the pinnacle of 4-channel Class AB amplifier engineering, delivering pure analog sound reproduction with exceptional power and clarity. This professional-grade amplifier produces 4 x 70 watts RMS at 4 ohms through advanced Class AB topology, ensuring rich, vibrant sound with the characteristic fidelity that analog amplifiers are renowned for. Manufactured by \u003ca href=\"https:\/\/audiointensity.com\/collections\/crescendo-car-audio\" rel=\"noopener\" target=\"_blank\"\u003eCrescendo Car Audio\u003c\/a\u003e, a leader in competition-level automotive audio solutions, this amplifier combines traditional Class AB warmth with modern engineering precision for discerning audiophiles and professional installations.\u003c\/p\u003e\n\u003ch3 class=\"text-2xl font-semibold mt-8 mb-4 text-blue-700\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003ePure Class AB Sound Excellence\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"mb-6 leading-relaxed\"\u003eProfessional car audio enthusiasts and Sound Quality (SQ) competitors demand the natural warmth and musicality that only pure Class AB amplification can provide, and the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCrescendo REVOLUTION 3A4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivers exactly that authentic analog experience. With its direct gain design and high-resolution playback capability, this amplifier preserves every nuance of the original recording while adding the harmonic richness that makes Class AB topology the preferred choice for critical listening applications. The sophisticated analog circuitry ensures transparent sound reproduction that brings music to life with clarity, depth, and emotional connection.\u003c\/p\u003e\n\u003ch3 class=\"text-2xl font-semibold mt-8 mb-4 text-blue-700\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eHigh-Resolution Audio Performance\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"mb-6 leading-relaxed\"\u003eAt the heart of this amplifier lies advanced circuitry specifically engineered for flawless playback of high-resolution audio files, making it the perfect choice for modern vehicles equipped with digital audio sources. The Revolution 3A4's wide frequency response and low distortion characteristics ensure that every detail from high-bitrate recordings is preserved and reproduced with stunning accuracy. This makes it ideal for audiophiles who demand the ultimate in sound quality from their premium audio collections, whether streaming high-resolution content or playing audiophile-grade recordings.\u003c\/p\u003e\n\u003ch3 class=\"text-2xl font-semibold mt-8 mb-4 text-blue-700\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eCompact Competition-Grade Design\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"mb-6 leading-relaxed\"\u003eDespite its substantial power output and premium construction, the Revolution 3A4 maintains a remarkably compact footprint of just 270mm x 150mm x 60mm, making installation practical in even the most space-constrained vehicles. The precision-engineered chassis features premium cosmetics with a brushed aluminum finish and distinctive black and red accent lines that reflect the amplifier's high-performance capabilities. At just 2.4kg, this amplifier delivers maximum power while minimizing installation complexity, allowing enthusiasts to achieve competition-level performance without compromising valuable vehicle space or requiring extensive mounting modifications.\u003c\/p\u003e","brand":"Crescendo","offers":[{"title":"Default Title","offer_id":42442888380505,"sku":"REVOLUTION 3A4","price":499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/crescendo-revolution-3a4-4-channel-amplifieramplifiercrescendo-6738386.webp?v=1772499973"},{"product_id":"crescendo-revolution-3a1-1-channel-amplifier","title":"Crescendo REVOLUTION 3A1 1 channel Amplifier","description":"\u003cp data-source-line=\"18-18\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCrescendo REVOLUTION 3A1\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erepresents the pinnacle of monoblock amplifier engineering, delivering an impressive 1000 watts RMS at 1 ohm through advanced Class D technology. Built for competition-level performance, this single-channel powerhouse incorporates the latest IRS2092S chipset design to ensure crystal-clear sound reproduction with exceptional efficiency and control. Manufactured by Crescendo Car Audio, a leader in high-end automotive audio solutions, this amplifier sets new standards for power delivery and sound quality in the premium monoblock category.\u003c\/p\u003e\n\u003ch3 id=\"competition-grade-power-delivery\" data-source-line=\"20-20\" tabindex=\"-1\"\u003e\u003cstrong\u003eCompetition-Grade Power Delivery\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-source-line=\"21-21\"\u003eProfessional car audio enthusiasts and SPL competitors demand uncompromising power and reliability, and the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCrescendo REVOLUTION 3A1\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivers exactly that performance standard. With its full-range frequency response and intelligent power management system, this amplifier drives the most demanding subwoofers and high-power speakers with absolute authority. The sophisticated Class D topology ensures minimal heat generation while maximizing power transfer efficiency, making it ideal for extended competition sessions and daily driving applications alike.\u003c\/p\u003e\n\u003ch3 id=\"advanced-irs2092s-technology\" data-source-line=\"23-23\" tabindex=\"-1\"\u003e\u003cstrong\u003eAdvanced IRS2092S Technology\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-source-line=\"24-24\"\u003eAt the heart of this amplifier lies the cutting-edge IRS2092S chipset, representing the latest advancement in Class D amplification technology. This sophisticated control system provides exceptional signal-to-noise ratio performance while maintaining very low harmonic distortion across the entire frequency spectrum. The result is pure, uncolored sound reproduction that preserves the original recording's dynamics and detail, whether you're powering competition subwoofers or high-end component speakers.\u003c\/p\u003e\n\u003ch3 id=\"compact-high-performance-design\" data-source-line=\"26-26\" tabindex=\"-1\"\u003e\u003cstrong\u003eCompact High-Performance Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-source-line=\"27-27\"\u003eDespite its massive power output, the Revolution 3A1 maintains a remarkably compact footprint measuring just 270mm x 150mm x 60mm and weighing only 2.3kg. This space-efficient design makes installation practical in even the most space-constrained vehicles while the premium CNC-machined chassis ensures optimal heat dissipation and long-term reliability. The sleek cosmetic design reflects the amplifier's high-performance capabilities while complementing modern vehicle interiors.\u003c\/p\u003e","brand":"Crescendo","offers":[{"title":"Default Title","offer_id":42442888872025,"sku":"","price":569.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/SpecificationAmplifierRevolution3A1B_00.avif?v=1761970802"}],"url":"https:\/\/audiointensity.com\/collections\/crescendo-amplifiers.oembed?page=2","provider":"Audio Intensity","version":"1.0","type":"link"}