{"product_id":"blurred-vision-audio-knockout-series-bv-4stack8-4-9","title":"Blurred Vision Audio KNOCKOUT SERIES BV-4STACK8.4 8\"","description":"\u003cp\u003e🥊 Blurred Vision Audio BV-Knockout Series – BV-4Stack8.4\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eDon’t let the size fool you — this 8\" subwoofer hits harder than most larger drivers!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eEngineered to deliver clean, powerful, and precise bass in a compact form, the BV-4Stack8.4 from the Knockout Series packs serious punch and performance. Perfect for small enclosures or multi-sub setups, this little monster is built to take every note you throw at it without missing a beat.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e📋 Specifications\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eFeature Specification\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSubwoofer Size 8\"\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003ePeak Power 1,100 Watts\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eRMS Power 500 Watts\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eFrequency Response 30 Hz – 1,200 Hz\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSensitivity 84.6 dB\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eVoice Coil 2.5\" 4-Layer High-Temp Kapton BASV\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eImpedance Dual 4 Ω (2x4Ω)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eXmax 15 mm\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMagnet Size 150 oz\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBasket Type Powder-Coated Black Die-Cast Aluminum\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eCone Material Pressed Paper with Carbon Fiber Finish\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSurround Type Custom 1\" High-Roll Foam\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTinsel Leads XL Flat Sewn-In Heavy-Duty Leads\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTerminals Silver Push Spring-Loaded Terminals\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMounting Depth 6.5\"\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eOverall Diameter 8.75\"\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWeight 18 lbs\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e💪 Performance Highlights\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eCompact 8-inch powerhouse designed for clean, tight, and responsive bass.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e2.5-inch 4-layer Kapton voice coil provides exceptional power handling and thermal stability.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eHigh-roll foam surround and carbon fiber cone deliver precise low-end control and durability.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eDie-cast aluminum basket ensures strength, rigidity, and reduced resonance.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eFlat sewn-in tinsel leads for increased reliability under high excursion.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e🔊 Small Size, Knockout Sound\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe BV-4Stack8.4 lives up to its name — a small subwoofer with knockout performance. Whether you’re running a compact system or building an array of subs, this unit delivers deep, accurate bass that stands up to much larger competitors.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBlurred Vision Audio’s Knockout Series proves that size isn’t everything — it’s all about precision, design, and raw output.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e Additional Information \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThis Blurred Vision BV-4STACK 8.4 subwoofer (8\", 4+4 Ω, 500 W RMS, Qts 0.712, Vas ≈ 4.2 L, Fs ≈ 55 Hz) wants a compact, low-tuned ported box for deep daily use.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eHere’s a design that’ll hit hard while keeping clean low end extension:\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e🔊 Ported Enclosure Design (Daily Bass \/ SQL Style)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eDriver: Blurred Vision BV-4STACK 8.4 (8″, dual 4 Ω)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTuning: 36 Hz\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003ePower: 500 W RMS\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eStyle: Daily music \/ deep punch\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e📦 Box Specs\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eNet Internal Volume-0.65 ft³ (18.4 L)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTuning Frequency-36 Hz\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003ePort Area-10 in²\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003ePort Type-Slot port, L-shaped (inside box)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003ePort Dimensions-1.25″ wide × 8″ tall × 18″ long\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWall Material\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e¾″ (19 mm) MDF\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMounting Depth Clearance≥ 6″\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e📐 Cut Sheet (External Dimensions)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e(Assumes ¾″ MDF and front-firing port\/sub)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eFront \/ Back (1)x14″W × 10″ H\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTop \/ Bottom (1)x14″W × 12″ D\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSides (2)x10″H ×12″ D\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003ePort Divider (1)-8″H × 18″ L (inside)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e➡️ Final external size: ~\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e14″W*10″*H*12\"D\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e➡️ Net volume after port \u0026amp; driver displacement: ≈ 0.65 ft³\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e➡️ Tuned to: ≈ 36 Hz\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e🎶 Performance Notes\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eStrong output 35–60 Hz, ideal for street or daily setups\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSmooth roll-off below 30 Hz (safe for excursion)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWorks great with 250–500 W RMS amps\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eIf you like tighter punch, shorten the port to 14″ → tune ≈ 40 Hz\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Blurred Vision Car Audio \u0026 Electronics llc","offers":[{"title":"Default Title","offer_id":51513736823071,"sku":null,"price":119.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/5182\/7487\/files\/IMG-20250818_120908368_HDR_e0090b65-0cfc-4876-9282-c738f2b66b59.jpg?v=1768022728","url":"https:\/\/blurredvisionaudio.myshopify.com\/products\/blurred-vision-audio-knockout-series-bv-4stack8-4-9","provider":"Blurred Vision Car Audio \u0026 Electronics llc","version":"1.0","type":"link"}