Subwoofer Enclosures | Car Subwoofer Boxes at Sonic Electronix

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Dual 12" 3/4 MDF Sealed Subwoofer Enclosure (Belva MDFD12)

Dual 12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/Polyfil (2.46 cu ft Airspace - 12SQB)

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Dual 12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/Polyfil (2.46 cu ft Airspace - 12SQB)

• 3/4" Medium Density Fiberboard Construction
• Durable Black Carpeting
• Pre-Lined with Poly-Fil
• Gold Speaker Terminals

109
Dual 12" 3/4 MDF Sealed Subwoofer Enclosure (Belva MDFD12)

Dual 12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/Polyfil (2.46 cu ft Airspace - 12SQB)

In stock

 
$119.99
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  • 50% Off Speaker Wire with Enclosure Purchase

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Dual 12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/Polyfil (2.46 cu ft Airspace - 12SQB)

$119.99

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NVX XKIT42 - 4 Gauge Amp Kit

Pure Virgin Copper, 4 Gauge Amplifier Installation Kit

$99.99

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Atrend 12GB

Black Bar Style Grille for 12" Subwoofers (1Pair)

$27.99

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NVX SDRLR1 Universal Roller Tool

Install your sound damping with the SDRLR1 tool

$7.99

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JL Audio Stealthbox® SB-GM-SLVCC2/12TW3/BK

Custom fit subwoofer enclosure for 2007-2013 Chevrolet Silverado / GMC Sierra Crew Cab Trucks with Ebony interior

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Custom fit subwoofer enclosure for 2007-2013 Chevrolet Silverado / GMC Sierra Crew Cab Trucks with Ebony interior

• Loaded Vehicle Specific Stealthbox Subwoofer Enclosure with Dual JL Audio 12TW3-D4
• 800 Watts RMS
• For 2007-2013 Chevrolet Silverado / GMC Sierra Crew Cab Trucks with Ebony interior
• Stealthbox installs neatly under rear seat

1
JL Audio Stealthbox® SB-GM-SLVCC2/12TW3/BK

Custom fit subwoofer enclosure for 2007-2013 Chevrolet Silverado / GMC Sierra Crew Cab Trucks with Ebony interior

In stock

Only 1 Left!

$2499.99 (34.00% off)
Vip Icon $1,649.99
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  • Get A Free $100 Dollar Gift Card With Purchase!
Kicker 47QL7R12

12" Loaded Ported Enclosure Quad Box

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12" Loaded Ported Enclosure Quad Box

• Four 600 Watt RMS Subwoofers
• Kerf-Cut Ported Box
• 2,400 Watts RMS
• Birch Plywood Construction

Kicker 47QL7R12

12" Loaded Ported Enclosure Quad Box

In stock

Only 1 Left!

$1599.95 (6.25% off)
Vip Icon $1,499.95

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12" Loaded Ported Enclosure Quad Box

$1499.95

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NVX Speaker Wire (XWS1225)

25 ft. of True 12 Gauge EnvyFlex Speaker Cable/Wire (100% Oxygen-Free Copper)

$29.99

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NVX Sound Dampening Trunk Kit (SDTK20)

20 Square Feet of Sound Dampening Material (Five 18" x 32" Pieces)

$59.99

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Car Stereo and Speaker Installation Tool Kit

Complete Car Stereo Tool Kit, Includes Voltage Test Light, Wire Stripper and More

$19.99

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Cerwin-Vega BKX7212S2

3000W XED Series Dual 12" Sealed Subwoofer Enclosure w/ Amplifier

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3000W XED Series Dual 12" Sealed Subwoofer Enclosure w/ Amplifier

• 3000W Dual 12" Sealed Subwoofer Enclosure with Amplifier
• 12" XED Series Subwoofers
•Includes 1000W Class A/B XED Series Amplifier
• 5/8" MDF Construction with Black Carpet
• Enclosure Dimensions: 9" TD x 15" BD x 30-5/8" W x 14" H

1
Cerwin-Vega BKX7212S2

3000W XED Series Dual 12" Sealed Subwoofer Enclosure w/ Amplifier

In stock

$499.99 (40.00% off)
$299.99
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2 Special offers
  • FREE 4 Gauge Amp Kit with Purchase!
  • 50% Off a Sound Dampening Kit with Your Subwoofer Purchase!

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3000W XED Series Dual 12" Sealed Subwoofer Enclosure w/ Amplifier

$299.99

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NVX SDTK20

Trunk Kit - 20 Square Feet of Sound Dampening Material (Five 18" x 32" Pieces)

$59.99

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JL Audio Stealthbox® SB-D-MGACAB/10W6v3

Custom fit subwoofer enclosure for 2006-Up Dodge Ram Mega Cab (Black)

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Custom fit subwoofer enclosure for 2006-Up Dodge Ram Mega Cab (Black)

• Loaded Vehicle Specific Stealthbox Subwoofer Enclosure with Dual 10" 10W6v3 Subwoofers
• 2400W Max • 1200W RMS
• For 2006-Up Dodge Ram Mega Cab
• Stealthbox Installs behind rear seat

JL Audio Stealthbox® SB-D-MGACAB/10W6v3

Custom fit subwoofer enclosure for 2006-Up Dodge Ram Mega Cab (Black)

Special order

Ships at Later Date

$2499.99 (32.00% off)
Vip Icon $1,699.99
JL Audio Stealthbox® SB-GM-AVAL/12TW3

Custom fit subwoofer enclosure for 2002-2012 Chevrolet Avalanche & 2002-2009 Cadillac Escalade

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Custom fit subwoofer enclosure for 2002-2012 Chevrolet Avalanche & 2002-2009 Cadillac Escalade

• Loaded Vehicle Specific Stealthbox Subwoofer Enclosure with Dual JL Audio 12TW3-D4
• 800 Watts RMS Power Handling
• Stealthbox seamlessly replaces the factory mid-gate

JL Audio Stealthbox® SB-GM-AVAL/12TW3

Custom fit subwoofer enclosure for 2002-2012 Chevrolet Avalanche & 2002-2009 Cadillac Escalade

Special order

Ships at Later Date

 
Vip Icon $1,899.99
Infinity PRIMUS 1270B

1200W Max (300W RMS) 12" Primus Series Single 4 Ohm Car Loaded Subwoofer Enclosure

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1200W Max (300W RMS) 12" Primus Series Single 4 Ohm Car Loaded Subwoofer Enclosure

• 1200 Watts Max
• 300 Watts RMS
• Polypropylene Cone
• Rubber Surround
• Stamped Steel Frame
• Black Carpeted Enclosure
• 5/8" Medium-Density Fiberboard Construction

1
Infinity PRIMUS 1270B

1200W Max (300W RMS) 12" Primus Series Single 4 Ohm Car Loaded Subwoofer Enclosure

In stock

$199.95 (49.99% off)
$99.99

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PRIMUS1270BAM small

1200W Max (300W RMS) 12" Primus Series Single 4 Ohm Car Loaded Subwoofer Enclosure

$99.99

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NVX Speaker Wire (XWS1225)

25 ft. of True 12 Gauge EnvyFlex Speaker Cable/Wire (100% Oxygen-Free Copper)

$29.99

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NVX Sound Dampening Trunk Kit (SDTK20)

20 Square Feet of Sound Dampening Material (Five 18" x 32" Pieces)

$59.99

Add
Car Stereo and Speaker Installation Tool Kit

Complete Car Stereo Tool Kit, Includes Voltage Test Light, Wire Stripper and More

$19.99

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NVX QBUS8v2 Under Seat Powered Subwoofer Enclosure with Integrated Amplifier

8" Quick Bass Universal System Powered/Amplified Subwoofer BOOST System - Universal B.O.O.S.T. System

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8" Quick Bass Universal System Powered/Amplified Subwoofer BOOST System - Universal B.O.O.S.T. System

• Low Profile Powered Subwoofer System
• 100 Watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control

54
NVX QBUS8v2 Under Seat Powered Subwoofer Enclosure with Integrated Amplifier

8" Quick Bass Universal System Powered/Amplified Subwoofer BOOST System - Universal B.O.O.S.T. System

In stock

$189.99 (21.05% off)
$149.99
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  • Save 20% off a 8-pack 8 gauge ferrule with heat shrink
  • Free NVX Black Reusable Cloth Face Mask with purchase!

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QBUS8v2 small

8" Quick Bass Universal System Powered/Amplified Subwoofer BOOST System - Universal B.O.O.S.T. System

$149.99

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Belva BAK82BL

Complete 8 Gauge Amplifier Wiring Kit with 2-Channel RCA Cable (CCA Wiring)

$19.99

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NVX SDTK20

Trunk Kit - 20 Square Feet of Sound Dampening Material (Five 18" x 32" Pieces)

$59.99

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Kicker Dual 12" Comp DC12 (43DC122)

600W Peak (300W RMS) Dual 12" Comp Series Loaded Ported Enclosure with 2-Ohm Final Impedance

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600W Peak (300W RMS) Dual 12" Comp Series Loaded Ported Enclosure with 2-Ohm Final Impedance

• 600W Peak
• 300W RMS
• 2 Ohm Final Impedance
• SoloKon Cone
• Polyfoam Ribbed Surround
• Monogrammed Carbon Fiber Front
• Tough Black Carpeting
• 3/4" MDF Construction

3
Kicker Dual 12" Comp DC12 (43DC122)

600W Peak (300W RMS) Dual 12" Comp Series Loaded Ported Enclosure with 2-Ohm Final Impedance

In stock

$349.95 (28.59% off)
Vip Icon $249.90
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  • 20% Off a Sound Dampening Kit with Your Subwoofer Purchase!

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43DC122 small

600W Peak (300W RMS) Dual 12" Comp Series Loaded Ported Enclosure with 2-Ohm Final Impedance

$249.90

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NVX Speaker Wire (XWS1225)

25 ft. of True 12 Gauge EnvyFlex Speaker Cable/Wire (100% Oxygen-Free Copper)

$29.99

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NVX Sound Dampening Trunk Kit (SDTK20)

20 Square Feet of Sound Dampening Material (Five 18" x 32" Pieces)

$59.99

Add
Car Stereo and Speaker Installation Tool Kit

Complete Car Stereo Tool Kit, Includes Voltage Test Light, Wire Stripper and More

$19.99

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NVX XQWE110T ** WORKS ONLY WITH NVX XQW12 **

10" Ported Subwoofer Shallow Truck Box Made for NVX X-Series (XQW102/XQW104)

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10" Ported Subwoofer Shallow Truck Box Made for NVX X-Series (XQW102/XQW104)

• Ideal For Trucks & Shallow Installs
• Mounting Depth: 5"
• Engineered for NVX XQW104/2
• Carbon Fiber Front Board
• Black Carpet

1
NVX XQWE110T ** WORKS ONLY WITH NVX XQW12 **

10" Ported Subwoofer Shallow Truck Box Made for NVX X-Series (XQW102/XQW104)

In stock

$129.99 (46.16% off)
$69.99

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XQWE110T small

10" Ported Subwoofer Shallow Truck Box Made for NVX X-Series (XQW102/XQW104)

$69.99

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NVX XKIT42 - 4 Gauge Amp Kit

Pure Virgin Copper, 4 Gauge Amplifier Installation Kit

$99.99

Add
High-Performance NVX Speaker Wire

25 ft. of True Spec 12 Gauge EnvyFlex Speaker Cable/Wire (100% Oxygen-Free Copper)

$29.99

Add
NVX SDRLR1 Universal Roller Tool

Install your sound damping with the SDRLR1 tool

$7.99

Add

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JL Audio Stealthbox® SLPK-YA-FXC-SG-TB

Custom fit subwoofer enclosure for Select 2013-Up Yamaha FX WaveRunner (Black)

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Custom fit subwoofer enclosure for Select 2013-Up Yamaha FX WaveRunner (Black)

• JL Audio SlamPak for Select Yamaha FX WaveRunners
• One pair of 6.5" JL Audio Vex Enclosed Pod Speakers
• Bluetooth Music Connection
• All Marine-Grade Components
• Made for Select 2013-Up Yamaha WaveRunners
• 500W Marine Amplifier
• Stealthbox Loaded w/ 8.8" Subwoofer

JL Audio Stealthbox® SLPK-YA-FXC-SG-TB

Custom fit subwoofer enclosure for Select 2013-Up Yamaha FX WaveRunner (Black)

Available

Ships in 1-2 weeks

 
$2,899.99
Cerwin-Vega XE10DV

XED Series Dual 10” Subwoofer in Factory-Tuned Vented Enclosure

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XED Series Dual 10” Subwoofer in Factory-Tuned Vented Enclosure

• 1600W Max / 450W RMS
• Nominal Impedance: 2 ohm
• Voice Coil: 2.0” (4-Layer)
• 3/4” MDF Vented Enclosure
• Polypropylene (PP) Cone

3
Cerwin-Vega XE10DV

XED Series Dual 10” Subwoofer in Factory-Tuned Vented Enclosure

In stock

 
$139.99

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XED Series Dual 10” Subwoofer in Factory-Tuned Vented Enclosure

$139.99

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NVX Speaker Wire (XWS1225)

25 ft. of True 12 Gauge EnvyFlex Speaker Cable/Wire (100% Oxygen-Free Copper)

$29.99

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NVX Sound Dampening Trunk Kit (SDTK20)

20 Square Feet of Sound Dampening Material (Five 18" x 32" Pieces)

$59.99

Add
Car Stereo and Speaker Installation Tool Kit

Complete Car Stereo Tool Kit, Includes Voltage Test Light, Wire Stripper and More

$19.99

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Alpine PWD-X5 (Open Box, Like New)

Powered Compact Subwoofer Enclosure with Built-in Amplifier & Digital Sound Processor (DSP)

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Powered Compact Subwoofer Enclosure with Built-in Amplifier & Digital Sound Processor (DSP)

• 25W x 4 + 165W x 1 RMS / 50W x 4 + 240W x 1 Max
• Compact installation
• Extensive sound tuning functions
• Wide connectivity options
• Wired Remote Control
• Bluetooth Audio Streaming

Alpine PWD-X5 (Open Box, Like New)

Powered Compact Subwoofer Enclosure with Built-in Amplifier & Digital Sound Processor (DSP)

In stock

$700.00 (28.58% off)
$499.95

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PWD-X5 small

Powered Compact Subwoofer Enclosure with Built-in Amplifier & Digital Sound Processor (DSP)

$499.95

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NVX SDTK20

Trunk Kit - 20 Square Feet of Sound Dampening Material (Five 18" x 32" Pieces)

$59.99

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Belva BSAP212

840W Max Dual 12" Powered Vented Subwoofer Enclosure With a Built-in Class D Amplifier

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840W Max Dual 12" Powered Vented Subwoofer Enclosure With a Built-in Class D Amplifier

• 840W Max / 360W RMS
• Dual 12" Powered Vented Subwoofer Enclosure
• Built-in Class D Amplifier
• High and low level inputs
• Remote Level Bass Control

Belva BSAP212

840W Max Dual 12" Powered Vented Subwoofer Enclosure With a Built-in Class D Amplifier

In stock

$349.99 (28.57% off)
$249.99

Item Added to Cart

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840W Max Dual 12" Powered Vented Subwoofer Enclosure With a Built-in Class D Amplifier

$249.99

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NVX SDTK20

Trunk Kit - 20 Square Feet of Sound Dampening Material (Five 18" x 32" Pieces)

$59.99

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MTX Audio RoadThunder Bass Box RTP8A - Amplified Enclosure Package

360W Peak (120W RMS) Loaded 8" Active Ported Subwoofer Enclosure featuring a Built-in Amplifier, Speaker-level (High-level) Inputs for OEM Integration, and External Wired Bass Knob Remote

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360W Peak (120W RMS) Loaded 8" Active Ported Subwoofer Enclosure featuring a Built-in Amplifier, Speaker-level (High-level) Inputs for OEM Integration, and External Wired Bass Knob Remote

• 120W Single 8" Vented Subwoofer Enclosure with Built-In Amplifier
• 120W RMS Class D Amplifier
• 8" Subwoofer
• Vented Enclosure with Carpeted Finish
• Single round port
• Enclosure Dimensions: 13.75" D x 13" W x 13" H

5
MTX Audio RoadThunder Bass Box RTP8A - Amplified Enclosure Package

360W Peak (120W RMS) Loaded 8" Active Ported Subwoofer Enclosure featuring a Built-in Amplifier, Speaker-level (High-level) Inputs for OEM Integration, and External Wired Bass Knob Remote

In stock

$179.95 (16.67% off)
$149.95
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  • 10% Off a Sound Dampening Kit with Your Subwoofer Purchase!

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RTP8A small

360W Peak (120W RMS) Loaded 8" Active Ported Subwoofer Enclosure featuring a Built-in Amplifier, Speaker-level (High-level) Inputs for OEM Integration, and External Wired Bass Knob Remote

$149.95

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Belva BAK82BL

Complete 8 Gauge Amplifier Wiring Kit with 2-Channel RCA Cable (CCA Wiring)

$19.99

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NVX SDTK20

Trunk Kit - 20 Square Feet of Sound Dampening Material (Five 18" x 32" Pieces)

$59.99

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Atrend 12SQV

12" Single Pro Series Vented Subwoofer Enclosure (1.5 Cu Ft Airspace)

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12" Single Pro Series Vented Subwoofer Enclosure (1.5 Cu Ft Airspace)

• 12" Single Pro Series Vented Subwoofer Enclosure
• Premium carpeted Finish
• Silver Spring Loaded Terminal Cups
• Completely Miter and Dado Panels
• Glued and Braced with Fasteners

13
Atrend 12SQV

12" Single Pro Series Vented Subwoofer Enclosure (1.5 Cu Ft Airspace)

In stock

 
$99.99
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2 Special offers
  • Get a FREE Pro Series Ported Enclosure with Purchase!
  • Get 20% Off A Pro Series Ported Enclosure with Purchase!

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12SQV small

12" Single Pro Series Vented Subwoofer Enclosure (1.5 Cu Ft Airspace)

$99.99

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NVX XKIT42 - 4 Gauge Amp Kit

Pure Virgin Copper, 4 Gauge Amplifier Installation Kit

$99.99

Add
NVX SDRLR1 Universal Roller Tool

Install your sound damping with the SDRLR1 tool

$7.99

Add
Banana Clip Terminals

These high grade banana clips allow you to plug into your banana clip ready terminal for a secure connection.

$2.99

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Belva BPKG212v2 - Complete Amplified Bass Package

1200 Watt Complete Bass Package with Two 12" Subs in Ported Box, Monoblock Amplifier and Amp Kit (BPKG212 v2)

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1200 Watt Complete Bass Package with Two 12" Subs in Ported Box, Monoblock Amplifier and Amp Kit (BPKG212 v2)

• Includes Everything You Need: Subs, Box, Amp & Wires
• Dual 12" Belva Subwoofers
• Monoblock Amp
• Ported Enclosure
• Complete Amp Kit w/ RCAs

70
Belva BPKG212v2 - Complete Amplified Bass Package

1200 Watt Complete Bass Package with Two 12" Subs in Ported Box, Monoblock Amplifier and Amp Kit (BPKG212 v2)

In stock

$399.99 (37.50% off)
$249.99
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  • Save 20% off a 8-pack 8 gauge ferrule with heat shrink

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BPKG212v2 small

1200 Watt Complete Bass Package with Two 12" Subs in Ported Box, Monoblock Amplifier and Amp Kit (BPKG212 v2)

$249.99

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NVX SDTK20

Trunk Kit - 20 Square Feet of Sound Dampening Material (Five 18" x 32" Pieces)

$59.99

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Infinity PRIMUS 1270B + Thunder 500.1 Amplifier + Amp Kit

12"Single 4 Ohm Car Loaded Subwoofer Enclosure + Class D Monoblock Amplifier + 4 Gauge Amp Kit

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12"Single 4 Ohm Car Loaded Subwoofer Enclosure + Class D Monoblock Amplifier + 4 Gauge Amp Kit

• 1200 Watts Max
• 300 Watts RMS
• Polypropylene Cone
• Rubber Surround
• Stamped Steel Frame
• Black Carpeted Enclosure
• 5/8" Medium-Density Fiberboard Construction

148
Infinity PRIMUS 1270B + Thunder 500.1 Amplifier + Amp Kit

12"Single 4 Ohm Car Loaded Subwoofer Enclosure + Class D Monoblock Amplifier + 4 Gauge Amp Kit

In stock

$449.89 (37.76% off)
$279.99

Item Added to Cart

PRIMUS1270BAM, THUNDER5001, BAK42 small

12"Single 4 Ohm Car Loaded Subwoofer Enclosure + Class D Monoblock Amplifier + 4 Gauge Amp Kit

$279.99

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NVX SDTK20

Trunk Kit - 20 Square Feet of Sound Dampening Material (Five 18" x 32" Pieces)

$59.99

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Cerwin Vega H6TE12SV

400W Max (150W RMS) HED Series Single 12" Vented Slim Subwoofer Enclosure w/ Built-In Amplifier

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400W Max (150W RMS) HED Series Single 12" Vented Slim Subwoofer Enclosure w/ Built-In Amplifier

• 400W Max Single 12" Vented Subwoofer Enclosure with Built-In Amplifier
• 12" HED Series Subwoofer
• Built-In 150W RMS Amplifier
• 3/4" MDF Construction Enclosure with Black Carpet Finish
• Enclosure Dimensions: 7.68" D x 30" W x 15.98" H

4
Cerwin Vega H6TE12SV

400W Max (150W RMS) HED Series Single 12" Vented Slim Subwoofer Enclosure w/ Built-In Amplifier

In stock

$319.99 (34.38% off)
$209.99
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  • Add an 8 Gauge Amp Kit to Your Purchase!

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H6TE12SV small

400W Max (150W RMS) HED Series Single 12" Vented Slim Subwoofer Enclosure w/ Built-In Amplifier

$209.99

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NVX SDTK20

Trunk Kit - 20 Square Feet of Sound Dampening Material (Five 18" x 32" Pieces)

$59.99

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Cerwin Vega H6TE10SV

400W Max (150W RMS) HED Series Single 10" Vented Slim Subwoofer Enclosure w/ Built-In Amplifier

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400W Max (150W RMS) HED Series Single 10" Vented Slim Subwoofer Enclosure w/ Built-In Amplifier

• 400W Max Single 10" Vented Subwoofer Enclosure with Built-In Amplifier
• 10" HED Series Subwoofer
• Built-In 150W rms Amplifier
• 3/4" MDF Construction Enclosure with Black Carpet Finish
• Enclosure Dimensions: 6.1" D x 27.99" W x 14.13" H

6
Cerwin Vega H6TE10SV

400W Max (150W RMS) HED Series Single 10" Vented Slim Subwoofer Enclosure w/ Built-In Amplifier

In stock

Only 1 Left!

$299.99 (33.33% off)
$199.99

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400W Max (150W RMS) HED Series Single 10" Vented Slim Subwoofer Enclosure w/ Built-In Amplifier

$199.99

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NVX SDTK20

Trunk Kit - 20 Square Feet of Sound Dampening Material (Five 18" x 32" Pieces)

$59.99

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Car Subwoofer Boxes Information


Car Subwoofer Enclosure & Car Sub Box Information: It is often overlooked, but every great car audio system features a subwoofer enclosure purposely selected to maximize subwoofer performance. It may surprise you to learn that a sub box can make or break the perfect setup. We have a wide variety of professionally constructed sub boxes, built for your convenience and designed to perfectly complement your personalized system. We advise you to choose a sealed, ported or bandpass box based on your car subwoofer specifications and available vehicle space. Sealed enclosures are smaller than most other types of sub boxes. They do not allow air to escape from the box, thus making it harder for the sub to move in and out. This increases the transient response, meaning tighter bass and greater sound accuracy. These boxes also have good power handling, as it is harder for the sub to bottom out? (excursion beyond peak excursion), which makes it less risky to push the subs to thump to the beat. However, since the airwaves cannot escape from the box, the sub is less efficient, meaning less sound reproduction. Their tightly sealed design also doesn't allow the speaker's motor structure to cool down as well as it does in other boxes or free air setups. Ported boxes, also known as vented boxes, are enclosures that are designed with a port tuned to a specific frequency. They are more efficient than sealed enclosures because the back waves are channeled into the listening environment along with the front waves, which gives you more sound output than sealed enclosures produce. The ports in these enclosures help produce deeper bass up to the tuned frequency. However, power handling is poor below the tuned frequency and as such, woofer damage can occur. Further, there is no internal pressure working against the speaker, giving it worse transient response and speaker damping than a sealed enclosure. Finally, prefabricated boxes are not built with ports tuned to manufacturer's recommendations. This may make reproduction sound muddy or sloppy. Also, the air exiting the ports will at times produce a medium to loud noise, called port noise. To summarize, ported boxes give you a higher sound output and will generally have a better low frequency extension than sealed boxes. On the downside, they are larger and have poor power handling below their tuned frequency. They also have a reduced transient response and may generate port noise. A bandpass enclosure is basically a combination between a sealed and vented enclosure. With one sealed and one ported chamber, bandpass boxes produce great power handling as well as a good low frequency response. However, you should note that a bandpass box should be specifically designed for your subwoofer(s). Furthermore, they are not as efficient as ported boxes, and since the ports in bandpass boxes are not tuned to speaker requirements, most speakers will have a better all around sound in ported or sealed enclosures. When trunk space is at a minimum, you might consider using free-air subwoofers. Free-air subwoofers are specially designed to perform without an enclosure. It is usually the easiest and least expensive way to add a subwoofer to most sedans. No enclosure is required, you just use a board mounted on the rear deck or in the trunk along with the subwoofer. The downside is that you will experience a worse low-frequency response, or simply put, less power handling and less bass. You also get the least amount of transient response. You must also be sure that the baffle board is properly sealed and that the trunk or surrounding areas are properly dampened, otherwise bass cancellation will occur (loss of bass). This is why, space allowing, we recommend that you invest in an enclosure to ensure optimal performance. Another small investment for better subwoofer performance is our polyester fiber fill, which slows down back waves inside of the box, making the subwoofer perform as though it were in a bigger enclosure. We recommend that you use approximately 1 pound of fill per cubic foot of box volume. In enclosures where the fiber fill may blow out of a port, a light multipurpose adhesive should be used to secure the fill to the wall linings. If you need help selecting the proper box for your subs, give us a call at 1-877-289-7664. Our staff will help you in selecting the right setup so that you can start building your dream car audio system today!

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