Blurred Vision Audio KNOCKOUT SERIES BV-4STACK8.4 8"

🥊 Blurred Vision Audio BV-Knockout Series – BV-4Stack8.4

 

Don’t let the size fool you — this 8" subwoofer hits harder than most larger drivers!

 

Engineered 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.

 

📋 Specifications

 

Feature Specification

 

Subwoofer Size 8"

 

Peak Power 1,100 Watts

 

RMS Power 500 Watts

 

Frequency Response 30 Hz – 1,200 Hz

 

Sensitivity 84.6 dB

 

Voice Coil 2.5" 4-Layer High-Temp Kapton BASV

 

Impedance Dual 4 Ω (2x4Ω)

 

Xmax 15 mm

 

Magnet Size 150 oz

 

Basket Type Powder-Coated Black Die-Cast Aluminum

 

Cone Material Pressed Paper with Carbon Fiber Finish

 

Surround Type Custom 1" High-Roll Foam

 

Tinsel Leads XL Flat Sewn-In Heavy-Duty Leads

 

Terminals Silver Push Spring-Loaded Terminals

 

Mounting Depth 6.5"

 

Overall Diameter 8.75"

 

Weight 18 lbs

 

💪 Performance Highlights

 

Compact 8-inch powerhouse designed for clean, tight, and responsive bass.

 

2.5-inch 4-layer Kapton voice coil provides exceptional power handling and thermal stability.

 

High-roll foam surround and carbon fiber cone deliver precise low-end control and durability.

 

Die-cast aluminum basket ensures strength, rigidity, and reduced resonance.

 

Flat sewn-in tinsel leads for increased reliability under high excursion.

 

🔊 Small Size, Knockout Sound

 

The 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.

 

Blurred Vision Audio’s Knockout Series proves that size isn’t everything — it’s all about precision, design, and raw output.

 

 Additional Information 

 

This 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.

 

Here’s a design that’ll hit hard while keeping clean low end extension:

 

🔊 Ported Enclosure Design (Daily Bass / SQL Style)

 

Driver: Blurred Vision BV-4STACK 8.4 (8″, dual 4 Ω)

 

Tuning: 36 Hz

 

Power: 500 W RMS

 

Style: Daily music / deep punch

 

📦 Box Specs

 

Net Internal Volume-0.65 ft³ (18.4 L)

 

Tuning Frequency-36 Hz

 

Port Area-10 in²

 

Port Type-Slot port, L-shaped (inside box)

 

Port Dimensions-1.25″ wide × 8″ tall × 18″ long

 

Wall Material

 

¾″ (19 mm) MDF

 

Mounting Depth Clearance≥ 6″

 

📐 Cut Sheet (External Dimensions)

 

(Assumes ¾″ MDF and front-firing port/sub)

 

Front / Back (1)x14″W × 10″ H

 

Top / Bottom (1)x14″W × 12″ D

 

Sides (2)x10″H ×12″ D

 

Port Divider (1)-8″H × 18″ L (inside)

 

➡️ Final external size: ~

 

14″W*10″*H*12"D

 

➡️ Net volume after port & driver displacement: ≈ 0.65 ft³

 

➡️ Tuned to: ≈ 36 Hz

 

🎶 Performance Notes

 

Strong output 35–60 Hz, ideal for street or daily setups

 

Smooth roll-off below 30 Hz (safe for excursion)

 

Works great with 250–500 W RMS amps

 

If you like tighter punch, shorten the port to 14″ → tune ≈ 40 Hz