{"product_id":"us-acoustics-kristy-4-channel-class-d-amplifier-4-x-100w","title":"US Acoustics Kristy | 4 Channel Class D Amplifier | 4 x 100w","description":"\u003cstyle\u003e\n  .usa-wrap { max-width: 100%; font-family: inherit; color: #e4e4e7 !important; }\n  .usa-hero { background: #18181b !important; border: 1px solid #3f3f46 !important; color: #ffffff !important; padding: 36px 28px; border-radius: 12px; margin-bottom: 28px; border-bottom: 4px solid #b91c1c !important; }\n  .usa-eyebrow { color: #ef4444 !important; font-size: 13px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; margin: 0 0 10px 0; }\n  .usa-hero h2 { color: #ffffff !important; font-size: 28px; margin: 0 0 8px 0; line-height: 1.2; }\n  .usa-hero p { color: #f4f4f5 !important; font-size: 16px; margin: 0 0 18px 0; }\n  .usa-badges { display: flex; flex-wrap: wrap; gap: 8px; }\n  .usa-badge { background: #b91c1c !important; color: #ffffff !important; font-size: 13px; font-weight: 600; padding: 6px 12px; border-radius: 4px; }\n  .usa-badge-alt { background: #27272a !important; color: #ffffff !important; border: 1px solid #b91c1c !important; }\n  .usa-wrap h3 { color: #ffffff !important; font-size: 22px; margin: 28px 0 12px 0; border-left: 4px solid #b91c1c !important; padding-left: 12px; }\n  .usa-wrap h4 { color: #ef4444 !important; font-size: 17px; margin: 20px 0 8px 0; }\n  .usa-wrap p { color: #e4e4e7 !important; font-size: 16px; line-height: 1.65; margin: 0 0 14px 0; }\n  .usa-callout { background: #27272a !important; border: 1px solid #ef4444 !important; border-radius: 8px; padding: 18px 20px; margin: 22px 0; }\n  .usa-callout p { color: #f4f4f5 !important; margin: 0; }\n  .usa-statgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 22px 0; }\n  .usa-stat { background: #18181b !important; border: 1px solid #3f3f46 !important; border-radius: 8px; padding: 16px; text-align: center; }\n  .usa-stat .usa-statnum { color: #ffffff !important; font-size: 22px; font-weight: 700; display: block; }\n  .usa-stat .usa-statlabel { color: #ef4444 !important; font-size: 12px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; display: block; margin-top: 4px; }\n  .usa-cta { background: #18181b !important; border: 1px solid #3f3f46 !important; color: #ffffff !important; padding: 28px; border-radius: 12px; margin-top: 30px; text-align: center; border-top: 4px solid #b91c1c !important; }\n  .usa-cta h3 { color: #ffffff !important; border-left: none !important; padding-left: 0; margin-top: 0; }\n  .usa-cta p { color: #f4f4f5 !important; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"usa-wrap\"\u003e\n\n  \u003cdiv class=\"usa-hero\"\u003e\n    \u003cp class=\"usa-eyebrow\"\u003eUS Acoustics Compact Class D Series\u003c\/p\u003e\n    \u003ch2\u003eUS Acoustics Kristy 4-Channel Class D Amplifier\u003c\/h2\u003e\n    \u003cp\u003eFour channels of full-range Class D in a chassis a little over eight inches long. The same 100 watts per channel as the Barbara Ann, in less than half the space.\u003c\/p\u003e\n    \u003cdiv class=\"usa-badges\"\u003e\n      \u003cspan class=\"usa-badge\"\u003e100W x 4 @ 4 Ohms\u003c\/span\u003e\n      \u003cspan class=\"usa-badge\"\u003e165W x 4 @ 2 Ohms\u003c\/span\u003e\n      \u003cspan class=\"usa-badge\"\u003e330W x 2 Bridged @ 4 Ohms\u003c\/span\u003e\n      \u003cspan class=\"usa-badge usa-badge-alt\"\u003e2-Year Warranty\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eFull Power, Almost No Footprint\u003c\/h3\u003e\n  \u003cp\u003eThe US Acoustics Kristy is rated at 100 watts RMS per channel into 4 ohms, 165 watts RMS per channel into 2 ohms, and 330 watts RMS x 2 bridged into 4 ohms, all at 14.4 volts. The chassis measures 8.26 x 4.68 x 2.04 inches. For context, the Barbara Ann makes the same 100 watts x 4 in a 17.7 inch chassis, so the Kristy delivers that power in a case less than half as long.\u003c\/p\u003e\n  \u003cp\u003eThat is the whole point of this amplifier. Under a seat, behind a kick panel, in a center console, on a motorcycle, or in any powersports install where a full-size four-channel simply will not fit, the Kristy still puts real power on all four speakers. The output stage is a full-range Class D design, so it runs tweeters and midranges as happily as it runs midbass, and it draws far less current doing it than a Class AB amplifier of the same rating.\u003c\/p\u003e\n\n  \u003cdiv class=\"usa-statgrid\"\u003e\n    \u003cdiv class=\"usa-stat\"\u003e\n\u003cspan class=\"usa-statnum\"\u003e\u0026lt;0.5%\u003c\/span\u003e\u003cspan class=\"usa-statlabel\"\u003eTHD\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"usa-stat\"\u003e\n\u003cspan class=\"usa-statnum\"\u003e\u0026gt;91 dB\u003c\/span\u003e\u003cspan class=\"usa-statlabel\"\u003eS\/N Ratio\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"usa-stat\"\u003e\n\u003cspan class=\"usa-statnum\"\u003e\u0026gt;70 dB\u003c\/span\u003e\u003cspan class=\"usa-statlabel\"\u003eChannel Separation\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"usa-stat\"\u003e\n\u003cspan class=\"usa-statnum\"\u003e\u0026gt;100\u003c\/span\u003e\u003cspan class=\"usa-statlabel\"\u003eDamping Factor\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eConformal Coated for Marine and Motorcycle Use\u003c\/h3\u003e\n  \u003cp\u003eThe printed circuit board is conformal coated, a thin protective film applied over the board and its components that shields them from moisture, salt air, dust and vibration-borne contaminants. US Acoustics specifies it for marine and motorcycle applications, and it is the reason this amplifier belongs on a bagger, a side-by-side or a center console boat rather than only inside a sealed cabin. It is not a substitute for mounting the amplifier out of direct spray, but it is the protection that lets a small amplifier live in a hard environment.\u003c\/p\u003e\n\n  \u003ch3\u003eIndependent Crossovers on Each Channel Pair\u003c\/h3\u003e\n  \u003cp\u003eChannels 1 and 2 and channels 3 and 4 each get their own gain, high-pass and low-pass controls. The high-pass is a 12 dB per octave filter adjustable from 20 Hz to 8 kHz, and the low-pass is a 24 dB per octave filter adjustable from 50 Hz to 8 kHz. Both filters have their own on and off switch, so either pair can be run full range with the crossovers bypassed entirely, which matters when the amplifier is fed from a DSP that is already doing the filtering.\u003c\/p\u003e\n  \u003cp\u003eGain on each pair takes anything from 200 millivolts to 6 volts, so the Kristy works behind a factory head unit with a line output converter, behind an aftermarket deck, or behind a processor without fighting the input stage.\u003c\/p\u003e\n\n  \u003ch3\u003eThree Ways to Run the Kristy\u003c\/h3\u003e\n  \u003ch4\u003eFour Speakers, Full Range\u003c\/h4\u003e\n  \u003cp\u003e100 watts to each of four speakers, with an independent high-pass on the front and rear pairs. This is the straightforward upgrade for a factory system where there is no room for a large amplifier.\u003c\/p\u003e\n  \u003ch4\u003eFront Stage Plus Bridged Subwoofer\u003c\/h4\u003e\n  \u003cp\u003eRun components on channels 1 and 2 with the high-pass engaged, bridge channels 3 and 4 for 330 watts into a 4 ohm subwoofer, and set the low-pass on that pair. One small amplifier, a complete system.\u003c\/p\u003e\n  \u003ch4\u003ePowersports, Marine and Motorcycle\u003c\/h4\u003e\n  \u003cp\u003eThe conformal coated board and the compact case are built for exactly this. Four speakers on a bagger or a UTV, or a pair of speakers plus a bridged sub on a boat, from an amplifier that hides almost anywhere.\u003c\/p\u003e\n\n  \u003cdiv class=\"usa-callout\"\u003e\n    \u003cp\u003e\u003cstrong\u003eInstall notes:\u003c\/strong\u003e the Kristy measures 8.26 x 4.68 x 2.04 inches and carries a single 60A onboard fuse, so size power and ground to that figure, 8 gauge on a short run and 4 gauge on a long one, and fuse the power wire at the battery. It is 2 ohm stable per channel and bridges into 4 ohms only, so do not bridge it onto a 2 ohm load. Angled terminals and integrated mounting feet keep the wiring tidy in a tight install.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eKristy or Barbara Ann?\u003c\/h3\u003e\n  \u003cp\u003eBoth make 100 watts RMS per channel into 4 ohms. The Barbara Ann is a Full Complementary Class AB amplifier with audiophile op amps, distortion below 0.01 percent, signal-to-noise above 97 dB and crossovers wide enough to run an active front stage, and it is the one to pick when measured sound quality is the goal and the space is there. The Kristy trades those last few decibels of measured performance for a chassis less than half the length, Class D efficiency, a conformal coated board and a lower price. If the amplifier has to fit somewhere a full-size four-channel cannot go, the Kristy is the answer.\u003c\/p\u003e\n\n  \u003ch3\u003eBuilt to the US Acoustics Standard\u003c\/h3\u003e\n  \u003cp\u003eProtection circuitry covers DC, short circuit, thermal and overload conditions, with green power and red protect LEDs on the end panel for fast troubleshooting. Every Kristy sold by Audio Intensity is brand new from US Acoustics with a 2-year warranty through authorized dealers.\u003c\/p\u003e\n\n  \u003cdiv class=\"usa-cta\"\u003e\n    \u003ch3\u003eAuthorized US Acoustics Dealer\u003c\/h3\u003e\n    \u003cp\u003eAudio Intensity ships the US Acoustics Kristy fast from Tullahoma, Tennessee, with real installer support before and after the sale. Tight on space or building a motorcycle or marine system? Tell us the vehicle and the speakers and we will help you plan the install and set the crossovers.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n","brand":"US Acoustics","offers":[{"title":"Default Title","offer_id":44957848731737,"sku":"Kristy","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/us-acoustics-kristy-4-channel-amplifier-top.jpg?v=1790162327","url":"https:\/\/audiointensity.com\/products\/us-acoustics-kristy-4-channel-class-d-amplifier-4-x-100w","provider":"Audio Intensity","version":"1.0","type":"link"}