{"product_id":"audiocontrol-spike-spk-8-box-sealed-8-wedge-enclosure","title":"AudioControl Spike SPK-8 Box: Sealed 8\" Wedge Enclosure","description":"\u003cdiv class=\"po-wrap\"\u003e\n\u003cstyle\u003e\n.po-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.8;color:#1e293b;max-width:1200px;margin:0 auto;background:#fff}\n.po-hero{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-hero .po-title{font-size:2.6em;font-weight:800;text-transform:uppercase;letter-spacing:2px;margin:0 0 10px 0;color:#fff}\n.po-hero .po-subtitle{font-size:1.2em;font-weight:300;opacity:.9;margin:0 0 30px 0}\n.po-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:20px}\n.po-badge{background:rgba(184,115,51,.2);border:1px solid #b87333;color:#d99058;padding:8px 20px;border-radius:20px;font-size:.9em;font-weight:600;letter-spacing:.5px}\n.po-section{padding:50px 40px;border-bottom:1px solid #e2e8f0;background:#fff}\n.po-section:nth-child(even){background:#fef3e7}\n.po-section h2{color:#8b5a2b;font-size:2em;font-weight:700;margin:0 0 20px 0;padding-bottom:12px;border-bottom:3px solid #b87333}\n.po-section h3{color:#0f172a;font-size:1.4em;font-weight:600;margin:30px 0 15px 0}\n.po-section p{font-size:1.05em;color:#334155;margin-bottom:18px}\n.po-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin:30px 0}\n.po-card{background:#fff;border:1px solid #e2e8f0;border-top:4px solid #b87333;padding:25px;border-radius:4px}\n.po-card h4{color:#8b5a2b;font-size:1.15em;font-weight:700;margin:0 0 12px 0;text-transform:uppercase;letter-spacing:1px}\n.po-card p{font-size:.98em;color:#475569;margin:0}\n.po-highlight{background:#fef3e7;border-left:4px solid #b87333;padding:25px 30px;margin:30px 0;border-radius:4px}\n.po-highlight p{color:#1e293b;margin:0;font-size:1.05em}\n.po-cta{background:linear-gradient(135deg,#0f172a 0%,#8b5a2b 100%);padding:60px 40px;text-align:center;color:#fff}\n.po-cta h2{font-size:2.2em;font-weight:700;margin:0 0 20px 0;color:#fff;border:none;padding:0}\n.po-cta p{font-size:1.15em;opacity:.92;max-width:800px;margin:0 auto 20px auto;color:#fff}\n@media (max-width:768px){.po-hero{padding:40px 20px}.po-hero .po-title{font-size:1.8em}.po-section{padding:30px 20px}.po-section h2{font-size:1.6em}.po-grid{grid-template-columns:1fr}.po-cta{padding:40px 20px}.po-cta h2{font-size:1.6em}}\n\u003c\/style\u003e\n\u003cdiv class=\"po-hero\"\u003e\n\u003cp class=\"po-title\"\u003ePerformance Optimized Wedge | AudioControl Spike SPK-8\u003c\/p\u003e\n\u003cp class=\"po-subtitle\"\u003e8\" Sealed Wedge Enclosure | Rear-Firing Trunk-Load Design\u003c\/p\u003e\n\u003cdiv class=\"po-badges\"\u003e\n\u003cspan class=\"po-badge\"\u003e0.50 ft3 Net\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e0.56 ft3 Gross\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eQtc 0.85\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eSingle Chamber Wedge\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003e19.56\" x 11.75\" x 6.38\/10.66\"\u003c\/span\u003e\u003cspan class=\"po-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eThe AudioControl Spike SPK-8 in a Sealed Wedge\u003c\/h2\u003e\n\u003cp\u003eThe SPK-8 is AudioControl's 8 inch Spike: a mica-coated fiber matrix paper cone, a three-layer high-temperature coil former, a dual damping system and a heavy-duty motor, with a removable grille, rated 350 watts RMS with 8.5 mm of one-way excursion, 4.29 inches of mounting depth on an 8.43 inch frame. Every Thiele-Small figure comes from AudioControl's own Spike Series user guide, one full parameter block per coil, and each block holds together on Qts, moving mass, cone area and sensitivity. AudioControl measures the 2 ohm and 4 ohm versions as separate drivers, and they differ, so each is aligned on its own figures below.\u003c\/p\u003e\n\u003cdiv class=\"po-highlight\"\u003e\u003cp\u003e0.50 cubic feet net on AudioControl's published figures: the SPK-8S4 (single 4 ohm) reads Qtc 0.852 with resonance at 68.2 Hz and half power at 58.6 Hz. That is AudioControl's own recommended sealed size for this driver, 0.5 cubic feet, between their 0.25 minimum and 0.75 maximum. That is well above maximally flat: a clear lift near resonance and extra midbass, the way AudioControl voices it in this size. This cabinet is listed for the SPK-8S4 (single 4 ohm) only. AudioControl's SPK-8S2 (single 2 ohm) version reads Qtc 0.56 in the same airspace, too damped to sound right sealed, so it is not offered in this enclosure.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eTrunk-Load Wedge Design Explained\u003c\/h2\u003e\n\u003cp\u003eThe driver mounts on the vertical trunk-lid-side face and fires rearward into the trunk cavity.\u003c\/p\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eSeat-Side Face Matches Seat Lean\u003c\/h4\u003e\n\u003cp\u003eAngled face matches the roughly 20 degree factory seat lean.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk-Lid-Side Face Fires the Woofer\u003c\/h4\u003e\n\u003cp\u003eVertical baffle, cone firing rearward into the trunk cavity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eTrunk Cavity Loading\u003c\/h4\u003e\n\u003cp\u003eThe trunk acts as an acoustic extension for a smoother presentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003ePreserves Trunk Cargo Space\u003c\/h4\u003e\n\u003cp\u003eThe wedge tucks against the seat back and the space in front stays usable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eEngineered for the AudioControl Spike SPK-8\u003c\/h2\u003e\n\u003cp\u003eAnechoic half power lands at 58.6 Hz, before any cabin gain. AudioControl publishes the driver displacement, 0.05 cubic feet, and it is taken out of the net figure.\u003c\/p\u003e\n\u003ch3\u003eAlignment Numbers\u003c\/h3\u003e\n\u003ctable class=\"df-tier\"\u003e\n\u003ctr\u003e\n\u003cth\u003eDriver\u003c\/th\u003e\n\u003cth\u003eSystem Qtc\u003c\/th\u003e\n\u003cth\u003efc\u003c\/th\u003e\n\u003cth\u003eF3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpike SPK-8 SPK-8S4 (single 4 ohm)\u003c\/td\u003e\n\u003ctd\u003eQtc 0.852\u003c\/td\u003e\n\u003ctd\u003e68.2 Hz\u003c\/td\u003e\n\u003ctd\u003e58.6 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eMounting Geometry\u003c\/h3\u003e\n\u003cp\u003eThe baffle is cut to 7.250 in for AudioControl's 8.425 in frame. The rear panel rakes 20 degrees, so the cavity deepens from 6.38 in at the top to 10.66 in at the base, and the 4.29 in motor clears it with 0.75 in to spare. AudioControl prints no bolt circle for the SPK-8, so the baffle ships undrilled with a threaded insert kit and stainless machine screws: set the driver in its recess, mark its holes, drill and press the inserts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWhat the Numbers Rest On\u003c\/h2\u003e\n\u003cdiv class=\"po-grid\"\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eLangboard Elite MDF\u003c\/h4\u003e\n\u003cp\u003ePremium 3\/4 in MDF throughout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eV-Groove and Dado Joinery\u003c\/h4\u003e\n\u003cp\u003eCNC cut V-grooves at every panel intersection, sides and brace seated in dados.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eDouble-Layer 1.5\" Front Baffle\u003c\/h4\u003e\n\u003cp\u003eTwo bonded 3\/4 in MDF sheets at the driver face, the outer layer machined as a flush recess.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-card\"\u003e\n\u003ch4\u003eAudioControl's Published Parameters\u003c\/h4\u003e\n\u003cp\u003eSPK-8S4 (single 4 ohm): Fs 60.3665 Hz, Qts 0.7535, Qes 0.8733, Qms 5.4933, Vas 3.9378 L, Mms 92.3784 g, Bl 11.331 N\/A, Re 3.2 ohm. Cone area 194 cm2. Xmax 8.5 mm (one-way, method not stated).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eWiring the AudioControl Spike SPK-8 to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003eThis cabinet is for the Spike SPK-8 SPK-8S4 (single 4 ohm): the SPK-8S4 (single 4 ohm) is a single 4 ohm coil, a 4 ohm load. A parallel load at or under 1 ohm needs an amplifier rated for it. Confirm the final load against your amplifier's minimum stable impedance before powering the system.\u003c\/p\u003e\n\u003cp\u003ePower handling is 350 watts RMS per driver. Aim for roughly 244 to 350 watts at the impedance you wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-section\"\u003e\n\u003ch2\u003eBuilt in Tennessee, Backed by Audio Intensity\u003c\/h2\u003e\n\u003cp\u003eCut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet with the gloss black acrylic baffle insert, one pre-wired terminal cup, 12 gauge OFC to the driver position. Polyfill wall lining installed. Threaded insert kit and stainless machine screws included (AudioControl publishes no bolt circle). 1 year limited warranty. Enclosure only, the driver is purchased separately. Call or text 931-563-5151.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"po-cta\"\u003e\n\u003ch2\u003eAudioControl Spike SPK-8: Cut for One Driver\u003c\/h2\u003e\n\u003cp\u003e0.50 cubic feet net at Qtc 0.85, F3 58.6 Hz, cut direct fit and built to order in Tennessee.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":47457482375257,"sku":"PO 8-S W SPK8 BB","price":269.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":47457482408025,"sku":"PO 8-S W SPK8 B","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_8-S_W_SPK8_Front.jpg?v=1791932077","url":"https:\/\/audiointensity.com\/products\/audiocontrol-spike-spk-8-box-sealed-8-wedge-enclosure","provider":"Audio Intensity","version":"1.0","type":"link"}