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1981 Audi 4000 S

Universal gear includes car amplifiers, subs, and other products that do not install in a specific location or require fitment to integrate with a vehicle.

Universal-Fit Audio for 1981 Audi 4000 S

When thinking of universal gear, we consider products like a car amp that gives more power to your speakers or subs, cell phone chargers, equalizers and sound processors, rear-seat entertainment and video monitors, as well as dash cameras.

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NVX VCW152 Version 3 (VCW152v3)

3000W Peak (1500W RMS) 15" VC-Series v3 Dual 2-ohm Car Subwoofer

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3000W Peak (1500W RMS) 15" VC-Series v3 Dual 2-ohm Car Subwoofer

• Peak Power: 3000 watts
• RMS Power: 1500 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Enhanced Non-Pressed Paper Cone
• Custom High Roll Foam Surround with black nylon stitching
• Mount depth: 8.19"
• Sensitivity: 88 dB (1W/1m)

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Kicker PTRTP10 (51PTRTP10)

800W Peak (400W RMS) Single Loaded 10" Sealed Down-firing Shallow Amplified Subwoofer Enclosure

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800W Peak (400W RMS) Single Loaded 10" Sealed Down-firing Shallow Amplified Subwoofer Enclosure

• 10" Amplified Loaded Subwoofer System
• 400 watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control

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NVX - Worth the Envy - Direct to Consumer Car Audio

Rockford Fosgate DSR-1

8-Channel Digital Signal Processor with Integrated iDataLink Maestro Module

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8-Channel Digital Signal Processor with Integrated iDataLink Maestro Module

• Digital Signal Processing with Integrated Maestro CAN Interface
• Four channel high level inputs with signal sense turn on
• 18 Pin Analog Input and 16 Pin Analog Output Harness
• Interactive Tuning Interface Controlled via Android/iOS APP

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$419.99

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• Digital Signal Processing with Integrated Maestro CAN Interface
• Four channel high level inputs with signal sense turn on
• 18 Pin Analog Input and 16 Pin Analog Output Harness
• Interactive Tuning Interface Controlled via Android/iOS APP

NVX BARCAM221

Universal Waterproof License Plate Mount Backup Camera with Full Metal Body

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Universal Waterproof License Plate Mount Backup Camera with Full Metal Body

• Universal Rear View Backup Camera
• High-Resolution CMOS PC1089 Image Sensor
• Mounting Style: Top of License Plate Frame
• Viewing Angle: 170 ° (super wide viewing angle)
• Resolution: 510 x 496 
• Waterproof: Yes (IP67/68 waterproof)
• Night vision: Infrared LED's

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NVX BIR200

200-Amp High Current Dual Battery Isolator and Relay for Car Audio Systems (Handles up to 300-Amp Surge)

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200-Amp High Current Dual Battery Isolator and Relay for Car Audio Systems (Handles up to 300-Amp Surge)

• 200-Amp continuous / 300-Amp surge
• Ideal for car stereo systems and mobile electronics
• Prevents the main starter battery from draining
• 10V to 16V DC operating range

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• 200-Amp continuous / 300-Amp surge
• Ideal for car stereo systems and mobile electronics
• Prevents the main starter battery from draining
• 10V to 16V DC operating range

Fusion MS-ARX70B

Wireless marine stereo remote (Black)

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Wireless marine stereo remote (Black)

• IPX6 and IPX7 water rating
• Built-in ANT technology
• Easy-to-use buttons and LED lighting
• Available in White

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• IPX6 and IPX7 water rating
• Built-in ANT technology
• Easy-to-use buttons and LED lighting
• Available in White

Crimestopper MIR-BRKT-437

Set of 7 Mirror Brackets for Crimestopper Mirrors with 4.3" & 7" LCD Screens

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Set of 7 Mirror Brackets for Crimestopper Mirrors with 4.3" & 7" LCD Screens

• 7-Pack
• Vehicle Specific Mirror Brackets
• Works Exclusively with the Crimestopper Mirrors with 4.3" and 7" LCD Screens

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-56% $19.95

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• 7-Pack
• Vehicle Specific Mirror Brackets
• Works Exclusively with the Crimestopper Mirrors with 4.3" and 7" LCD Screens

Metra 82-4400

1/2" Universal 6.5" to 6.75" Plastic Speaker Spacer Rings

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1/2" Universal 6.5" to 6.75" Plastic Speaker Spacer Rings

• Works with Most 5-1/4" Speakers
• Factory Style Finishes
• Heavy Duty ABS Plastic
• Works with 6" to 6.5" Speakers

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• Works with Most 5-1/4" Speakers
• Factory Style Finishes
• Heavy Duty ABS Plastic
• Works with 6" to 6.5" Speakers

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NVX XPLOC2

2-Channel 300W Adjustable Line Output Converter with Remote Turn On

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2-Channel 300W Adjustable Line Output Converter with Remote Turn On

• 2-Channel Premium Adjustable Line Output Converter
• 3:1 Step Down With Adjustable Output
• 300w Total Maximum Input (150w Per Channel)
• Super Low Distortion

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• 2-Channel Premium Adjustable Line Output Converter
• 3:1 Step Down With Adjustable Output
• 300w Total Maximum Input (150w Per Channel)
• Super Low Distortion

Hertz S8 DSP

8-Channel Digital Sound Processor with Automatic Time Correction, Digital Equalizer, and High-Resolution Audio

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8-Channel Digital Sound Processor with Automatic Time Correction, Digital Equalizer, and High-Resolution Audio

• 8-Channel Digital Sound Processor
• 7-Band parametric equalizer
• Speaker level (high-level) inputs
• Bluetooth for for added control
• High-resolution audio
• Configurable via S8 DSP application/software

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• 8-Channel Digital Sound Processor
• 7-Band parametric equalizer
• Speaker level (high-level) inputs
• Bluetooth for for added control
• High-resolution audio
• Configurable via S8 DSP application/software

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Stinger SK101

300A 1/0-Gauge Amplifier Power Wiring Kit with Stinger SHD201 ANL Fuse Holder

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300A 1/0-Gauge Amplifier Power Wiring Kit with Stinger SHD201 ANL Fuse Holder

• 1/0 gauge Power Amplifier Installation Kit
• Designed specifically for car audio systems up to 4000 watts
Stinger SHD201 water-resistant ANL fuse holder included

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• 1/0 gauge Power Amplifier Installation Kit
• Designed specifically for car audio systems up to 4000 watts
Stinger SHD201 water-resistant ANL fuse holder included

Stinger SPC505

5 Farad Pro Digital Hybrid Capacitor

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5 Farad Pro Digital Hybrid Capacitor

• Digital 5 Farad Capacitor
• Bright Red LED Voltage Display
• Monitor System Voltage
• 12-16 Volt Operation / 18 Volt Surge
• Louder And Cleaner Bass Response

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• Digital 5 Farad Capacitor
• Bright Red LED Voltage Display
• Monitor System Voltage
• 12-16 Volt Operation / 18 Volt Surge
• Louder And Cleaner Bass Response

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AudioControl LC1i

2-Channel 400W Line Output Converter

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2-Channel 400W Line Output Converter

• 2-Channel Line Out Converter
• 2 inputs and 2 outputs
• Compact design

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• 2-Channel Line Out Converter
• 2 inputs and 2 outputs
• Compact design

Second Skin Audio SPEC-20-1GAL

1 Gallon Spray-on or Brush-on Spectrum Liquid Sound Damping

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1 Gallon Spray-on or Brush-on Spectrum Liquid Sound Damping

• 20 square feet sq. ft Sound Damping Liquid Coating
• Material Used: Vibration Dampener
• Material Thickness: 0.080"
• Install Location: Universal
• Contains 1 gallon of liquid spray

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• 20 square feet sq. ft Sound Damping Liquid Coating
• Material Used: Vibration Dampener
• Material Thickness: 0.080"
• Install Location: Universal
• Contains 1 gallon of liquid spray

PRV Audio DSP 2.8X TEAM

8-Channel Digital Sound Processor

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8-Channel Digital Sound Processor

• 8-Channel Digital Signal Processor
• Designed to integrate with aftermarket or factory OEM systems
• Integrated LCD display and intuitive interface
• Includes 2 audio inputs and 8 independent outputs
• 15-graphic equalizer with separate parametric equalizers

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• 8-Channel Digital Signal Processor
• Designed to integrate with aftermarket or factory OEM systems
• Integrated LCD display and intuitive interface
• Includes 2 audio inputs and 8 independent outputs
• 15-graphic equalizer with separate parametric equalizers

Install Bay IBVSTABL

12V 2A DC-DC Voltage Converter Stabilizer

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12V 2A DC-DC Voltage Converter Stabilizer

• Voltage converter stabilizer
• Input voltage: DC 8 volts - 40 volts
• Output voltage: DC 12 volts
• Maximum output current: 2 amps

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• Voltage converter stabilizer
• Input voltage: DC 8 volts - 40 volts
• Output voltage: DC 12 volts
• Maximum output current: 2 amps

NVX XAPK1D

Full Spec 1/0 Gauge 100% (OFC) Oxygen Free Copper Dual Amplifier Power Wiring Kit for Amplifiers up to 4000 Watts

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Full Spec 1/0 Gauge 100% (OFC) Oxygen Free Copper Dual Amplifier Power Wiring Kit for Amplifiers up to 4000 Watts

• 1/0 Gauge Dual Amplifier Power Installation Kit
• For Amplifiers Up To 4000 Watts RMS
• 100% (OFC) Oxygen Free Copper
• Tinned conductors for corrosion resistance
• Pre-terminated seamless power and ground ring terminals
• ANL/Mini-ANL Fuse Holder with 300 amp fuse
• Two brass and satin chrome distribution blocks
• CEA-2015 and BC5W2 Compliant

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2026-07-27 11:08:20

• 1/0 Gauge Dual Amplifier Power Installation Kit
• For Amplifiers Up To 4000 Watts RMS
• 100% (OFC) Oxygen Free Copper
• Tinned conductors for corrosion resistance
• Pre-terminated seamless power and ground ring terminals
• ANL/Mini-ANL Fuse Holder with 300 amp fuse
• Two brass and satin chrome distribution blocks
• CEA-2015 and BC5W2 Compliant

Rockford Fosgate PMX-ANT Antenna

AM/FM/WB Amplified 12V Antenna

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AM/FM/WB Amplified 12V Antenna

• PMX-ANT AM/FM/WB Amplified 12V Antenna
• Universal AM/FM/WB Antenna
• Omnidirectional
• Quick Power Connect for Easy Installation

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• PMX-ANT AM/FM/WB Amplified 12V Antenna
• Universal AM/FM/WB Antenna
• Omnidirectional
• Quick Power Connect for Easy Installation

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Alpine Status HDP-D90

720W RMS Class D Status Series 12-Channel Hi-Res DSP Amplifier

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720W RMS Class D Status Series 12-Channel Hi-Res DSP Amplifier

• 50 watts x 8 channel + 80 watts x 4 channel @ 4 ohm
• Total RMS Power: 720 watts
• Class D 4 ohm Stable 12-Channel Digital Sound Processor Amplifier
• High-resolution (Hi-Res) audio playback
• Selectable pre-configured sound system configurations
• Embedded RTA signals for customized sound tuning
• Bluetooth audio streaming with included external module

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• 50 watts x 8 channel + 80 watts x 4 channel @ 4 ohm
• Total RMS Power: 720 watts
• Class D 4 ohm Stable 12-Channel Digital Sound Processor Amplifier
• High-resolution (Hi-Res) audio playback
• Selectable pre-configured sound system configurations
• Embedded RTA signals for customized sound tuning
• Bluetooth audio streaming with included external module

MTX Audio TNE212D

400W RMS Loaded Dual 12" Sealed Enclosure

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400W RMS Loaded Dual 12" Sealed Enclosure

• Sealed enclosure with 2 12" Terminator Series Subwoofer
• 200 watts RMS each
• Final Impedance: 2-ohm
• Dimensions: 29.63" L x 14" H x 13.5" W

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SPL-LAB Wireless Bass Meter

Portable sound level meter for measuring the sound pressure

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Portable sound level meter for measuring the sound pressure

• Calibrated according to the TERM-LAB Classic and Magnum
• Amplitude range from 110 to 190 dB
• Frequency range from 10 to 120 Hz
• ADC module and WiFi module
• Wired and wireless data transfer
• Vacuum suction cups included
• Shockproof plastic material

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• Calibrated according to the TERM-LAB Classic and Magnum
• Amplitude range from 110 to 190 dB
• Frequency range from 10 to 120 Hz
• ADC module and WiFi module
• Wired and wireless data transfer
• Vacuum suction cups included
• Shockproof plastic material

NVX XKIT02

Full Spec 1/0 Gauge 100% (OFC) Oxygen Free Copper Complete 2-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 4000 Watts

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Full Spec 1/0 Gauge 100% (OFC) Oxygen Free Copper Complete 2-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 4000 Watts

• Complete 1/0 Gauge Amplifier Installation Kit
• For Amplifiers Up To 4000 Watts RMS
• 100% (OFC) Oxygen Free Copper
• Dual Twisted Pair 2-Channel RCA Cable
• Tinned conductors for corrosion resistance
• Pre-terminated seamless power and ground ring terminals
• ANL/Mini-ANL Fuse Holder with 300 amp fuse
• CEA-2015 and BC5W2 Compliant

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Save 30% off an NVX XKIT02 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT02 Amp Kit! No code needed — discount applies automatically at checkout.
15% off an NVX XCAP10H w/ Select Amp Kits Add a qualifying amplifier to your cart and save 15% on the NVX XCAP10H Capacitor! No code needed — discount applies automatically at checkout.
Purchase $400 or More of NVX and Save 15%!
2026-07-27 11:08:20
Used from: $155.99

• Complete 1/0 Gauge Amplifier Installation Kit
• For Amplifiers Up To 4000 Watts RMS
• 100% (OFC) Oxygen Free Copper
• Dual Twisted Pair 2-Channel RCA Cable
• Tinned conductors for corrosion resistance
• Pre-terminated seamless power and ground ring terminals
• ANL/Mini-ANL Fuse Holder with 300 amp fuse
• CEA-2015 and BC5W2 Compliant

Kicker KISL (46KISL)

Speaker-level to RCA Low-level for Amplifier Input Converter for Amps with a High-Low Switch

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Speaker-level to RCA Low-level for Amplifier Input Converter for Amps with a High-Low Switch

• 2-Channel Speaker to RCA Cable
• Split-Pin RCAs
• 16 Gauge Speaker Wire to RCA
• K-Grip Line & K-Grip Connectors
• Ergonomic Design • 2 Feet

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• 2-Channel Speaker to RCA Cable
• Split-Pin RCAs
• 16 Gauge Speaker Wire to RCA
• K-Grip Line & K-Grip Connectors
• Ergonomic Design • 2 Feet

Limited time!

JL Audio BassWedge CP112-W0v3

300W RMS 12" W0v3 Series BassWedge Ported Subwoofer System

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300W RMS 12" W0v3 Series BassWedge Ported Subwoofer System

• 600W Peak
• 300W RMS
• Top-Quality MDF Construction
• Durable Dark Gray Carpet Finish
• Five-Way Binding Post Connectors
• Embroidered JL Audio Logo

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List price $279.99
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T-Spec VPNB4

MANL 4-Position All-in-One Distribution Block

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MANL 4-Position All-in-One Distribution Block

• (2) 1/0 ga inputs for power
• (4) 4/8 ga MANL fused power outputs
• >Small Footprint with compact brass design
• All in one compact block

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$45.00

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• (2) 1/0 ga inputs for power
• (4) 4/8 ga MANL fused power outputs
• >Small Footprint with compact brass design
• All in one compact block

Limited time!

Shuriken SK-BT80-BX

Battery Box for SK-BT80

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Battery Box for SK-BT80

• Made with heavy-gauge steel
• Box is universal
• High quality at an affordable price
• Bottom of the boxes have predrilled flanges

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• Made with heavy-gauge steel
• Box is universal
• High quality at an affordable price
• Bottom of the boxes have predrilled flanges

DS18 EN-DF10A

500W Peak (250W RMS) Loaded Single Amplified 10" Sealed Enclosure

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500W Peak (250W RMS) Loaded Single Amplified 10" Sealed Enclosure

• 10" Amplified Loaded Subwoofer System
• 250 watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost: 0dB to 12dB
• Speaker-Level Inputs

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$359.95

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Tru Spec 6.5" Speaker Rings

6.5" MDF Speaker Rings (1 Pair) Tru Spec Series (Made in the USA)

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6.5" MDF Speaker Rings (1 Pair) Tru Spec Series (Made in the USA)

• Material: 0.75" MDF
• Inner Diameter: 5.85"
• Outer Diameter: 7.5"

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List price $12.99
-46% $6.99

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• Material: 0.75" MDF
• Inner Diameter: 5.85"
• Outer Diameter: 7.5"

Limited time!

Belva BST408

Pair of 4 Gauge Spade Terminals, #8 Opening with Nickel Plated Brass (1 Black & 1 Red)

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Pair of 4 Gauge Spade Terminals, #8 Opening with Nickel Plated Brass (1 Black & 1 Red)

• Spade Terminals
• 4 Gauge
• 1 Red & 1 Black
• Nickel Plated
• Resealable Polybag

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• Spade Terminals
• 4 Gauge
• 1 Red & 1 Black
• Nickel Plated
• Resealable Polybag

Install Bay IBFG8

8 Gauge (3/4" Mounting Hole) Waterproof Firewall Grommet

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8 Gauge (3/4" Mounting Hole) Waterproof Firewall Grommet

• 8 Gauge Firewall Grommet
• IP68 Waterproof Rating
• Protects Cables When Installing Through a FIrewall
• Sold Individually

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List price $2.99
-33% $1.99

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• 8 Gauge Firewall Grommet
• IP68 Waterproof Rating
• Protects Cables When Installing Through a FIrewall
• Sold Individually

Install Bay PSP2

Complete ABS Port Tube Kit - 2" x 11" Port

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Complete ABS Port Tube Kit - 2" x 11" Port

• Complete Port Tube Kit
• 2" x 11" Port
• Achieve Greater Sound Pressure Levels with Less Distortion
• High Quality ABS Construction
• Mounting Hole Variations
• Designed in the U.S.A.

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• Complete Port Tube Kit
• 2" x 11" Port
• Achieve Greater Sound Pressure Levels with Less Distortion
• High Quality ABS Construction
• Mounting Hole Variations
• Designed in the U.S.A.

Precision Power HD14.FTD

Tweeter Diaphragm Replacement for HD14.FHT Tweeters (1 Piece)

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Tweeter Diaphragm Replacement for HD14.FHT Tweeters (1 Piece)

• Replacement tweeter diaphragm for premium gauge tweeters
• Specifically designed for HD14.FTD tweeters
• Direct replacement, easy installation
• Includes one (1) replacement tweeter diaphragm

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• Replacement tweeter diaphragm for premium gauge tweeters
• Specifically designed for HD14.FTD tweeters
• Direct replacement, easy installation
• Includes one (1) replacement tweeter diaphragm

Limited time!

NVX XIV45

16.4 ft (5 meter) 4-Channel V-Series RCA Audio Interconnect Cable

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16.4 ft (5 meter) 4-Channel V-Series RCA Audio Interconnect Cable

• Shielded noise-rejecting Twisted-pair construction
• Heavy gauge OFC conductors ensure superior sound quality
• Split-tip Silver-Plated ends offer best in class signal transfer
• Molded ends equipped with colored channel identifiers

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• Shielded noise-rejecting Twisted-pair construction
• Heavy gauge OFC conductors ensure superior sound quality
• Split-tip Silver-Plated ends offer best in class signal transfer
• Molded ends equipped with colored channel identifiers

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NVX XWS1675

75 ft 16-Gauge EnvyFlex 100% Oxygen Free Copper (OFC) Speaker Wire (Blue/Gray)

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75 ft 16-Gauge EnvyFlex 100% Oxygen Free Copper (OFC) Speaker Wire (Blue/Gray)

• True Spec 16 gauge EnvyFlex Speaker Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue and Gray
• Twisted-pair technology eliminates noise

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• True Spec 16 gauge EnvyFlex Speaker Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue and Gray
• Twisted-pair technology eliminates noise

Rockford Fosgate RFCB140 Circuit Breaker

140A Platinum Plated Circuit Breaker with 1/0-AWG / 4-AWG Inputs/Outputs

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140A Platinum Plated Circuit Breaker with 1/0-AWG / 4-AWG Inputs/Outputs

• 1/0-AWG / 4-AWG inputs
• Platinum plated
• Low-resistance, high-current ability
• Set screw style connection - no need for ring terminals

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• 1/0-AWG / 4-AWG inputs
• Platinum plated
• Low-resistance, high-current ability
• Set screw style connection - no need for ring terminals

Metra 89-50-0900

Universal Trim Rings

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Universal Trim Rings

• Universal Double-DIN trim rings
• For Double-DIN radio installations

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• Universal Double-DIN trim rings
• For Double-DIN radio installations

JL Audio XB-MFBU-ANL

Master ANL Fuse Holder for 1/0 Gauge to 4 Gauge Power Wires

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Master ANL Fuse Holder for 1/0 Gauge to 4 Gauge Power Wires

• Master ANL Fuse Holder
• Maximum Input Gauge Size: 1/0 AWG
• Maximum Ouput Gauge Size: 1/0 AWG
• Total Number of Inputs: 1
• Total Number of Outputs: 1
• Brass material with marine stannum plating

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• Master ANL Fuse Holder
• Maximum Input Gauge Size: 1/0 AWG
• Maximum Ouput Gauge Size: 1/0 AWG
• Total Number of Inputs: 1
• Total Number of Outputs: 1
• Brass material with marine stannum plating

JL Audio XD-CLRAIC2-SW Speaker Wire to RCA Cable

2-channel Speaker Wire to RCA Adaptor for High-Level Signal Connection to Amplifiers

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2-channel Speaker Wire to RCA Adaptor for High-Level Signal Connection to Amplifiers

• 2-Channel Speaker Wire to RCA Adaptor for High-Level Signal Connection to Amplifiers
• Left and Right Channel Male RCA Plugs to Parallel Speaker Cable
• Satin Black Jacket

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• 2-Channel Speaker Wire to RCA Adaptor for High-Level Signal Connection to Amplifiers
• Left and Right Channel Male RCA Plugs to Parallel Speaker Cable
• Satin Black Jacket

Limited time!

Kicker CXA1800.1 (46CXA18001T)

1800W RMS Class D CX Series Monoblock Car Amplifier

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1800W RMS Class D CX Series Monoblock Car Amplifier

• 900 watts x 1 channel @ 4 ohm
• 1800 watts x 1 channel @ 2 ohm
• 1800 watts x 1 channel @ 1 ohm
• Total RMS Power: 1800 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Heise HE-SS9

18W Universal 9" Super Slimline Series Single Row 6 LED Light Bar

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18W Universal 9" Super Slimline Series Single Row 6 LED Light Bar

• Universal 9” Single Row LED Light Bar
• Water-resistant IPX-67 Rating
• 8° Spot Beam Pattern
• Integrated epoxy-encapsulated electronics
• Includes both rear channel brackets and low profile side brackets

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• Universal 9” Single Row LED Light Bar
• Water-resistant IPX-67 Rating
• 8° Spot Beam Pattern
• Integrated epoxy-encapsulated electronics
• Includes both rear channel brackets and low profile side brackets

NVX XVRC2

Universal Remote Level Controller/Bass Knob with Digital Voltmeter

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Universal Remote Level Controller/Bass Knob with Digital Voltmeter

• NVX Remote Level Controller with Digital Voltmeter
• Can adjust the amplifier gain even while driving
• In-dash or Under-dash mountable
• Compatible with most head units/amplifiers combinations
• Blue LED display (high voltage / low voltage)

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• NVX Remote Level Controller with Digital Voltmeter
• Can adjust the amplifier gain even while driving
• In-dash or Under-dash mountable
• Compatible with most head units/amplifiers combinations
• Blue LED display (high voltage / low voltage)

Cerwin-Vega RPMFMCBLK

Flat Surface Mount Bracket for Marine Wake Tower Speaker Pods (Black)

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Flat Surface Mount Bracket for Marine Wake Tower Speaker Pods (Black)

• RPM marine wake tower speakers flat mount bracket
• Designed for SMC/VMC marine tower speaker pods
• Ideal for surface or deck mounting
• Sleek black stylish finish to match factory design

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• RPM marine wake tower speakers flat mount bracket
• Designed for SMC/VMC marine tower speaker pods
• Ideal for surface or deck mounting
• Sleek black stylish finish to match factory design

4 Pack of 100 Amp Nickel-Plated MANL Fuse (Belva BMANL100)

Four fuses per order. High quality 100 Amp MANL Fuses

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Four fuses per order. High quality 100 Amp MANL Fuses

• 100A MANL Fuse (4 Pack)
• Nickel Plated for Better Power Transfer
• Resealable Polybag
• Heavy Duty Construction

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• 100A MANL Fuse (4 Pack)
• Nickel Plated for Better Power Transfer
• Resealable Polybag
• Heavy Duty Construction

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NVX XPLOC4

4-Channel 600W Adjustable Line Output Converter with Remote Turn On

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4-Channel 600W Adjustable Line Output Converter with Remote Turn On

• 4-Channel Premium Adjustable Line Output Converter
• 6:1 Step Down With Adjustable Output
• 600w Total Maximum Input (150w Per Channel)
• Super Low Distortion

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• 4-Channel Premium Adjustable Line Output Converter
• 6:1 Step Down With Adjustable Output
• 600w Total Maximum Input (150w Per Channel)
• Super Low Distortion

Sundown Audio M-12 D2 12" (M12D2)

4000W Peak (2000W RMS) 12" M Series Dual 2-ohm Car Subwoofer (SW-M12D2)

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4000W Peak (2000W RMS) 12" M Series Dual 2-ohm Car Subwoofer (SW-M12D2)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• High Roll Foam Surround
• Mount depth: 10.88"
• Sensitivity: 80.6 dB

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Stinger SPT53102

PRO Classic Battery Terminal (1) 1/0ga + (1) 4ga + (2) 8ga Outputs Shoc-Krome (Positive)

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PRO Classic Battery Terminal (1) 1/0ga + (1) 4ga + (2) 8ga Outputs Shoc-Krome (Positive)

• Positive Battery Terminal
• Shoc-Krome-plated Output
• Impact resistant covers
• One 4 Gauge Output
• One 1/0 Gauge Output
• Two 8 Gauge Outputs

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• Positive Battery Terminal
• Shoc-Krome-plated Output
• Impact resistant covers
• One 4 Gauge Output
• One 1/0 Gauge Output
• Two 8 Gauge Outputs

NVX XCAMLP

High Resolution License Plate Frame Backup Camera

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High Resolution License Plate Frame Backup Camera

• Universal Rear View Backup Camera
• Mounting Style: Full License Plate Frame
• Viewing Angle: 170 °
• Resolution: 720 x 480 
• Waterproof: Yes
• Night vision: LED's

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• Universal Rear View Backup Camera
• Mounting Style: Full License Plate Frame
• Viewing Angle: 170 °
• Resolution: 720 x 480 
• Waterproof: Yes
• Night vision: LED's

Viper 7701V (Requires Programming)

Remote for Viper Responder SST Car Alarm Models: 5900, 5500, 4301V, and 5301V

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Remote for Viper Responder SST Car Alarm Models: 5900, 5500, 4301V, and 5301V

• Replacement Viper Remote / LCD Pager For Select Viper Alarms

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• Replacement Viper Remote / LCD Pager For Select Viper Alarms

Atrend 12AME

Empty Single 12" Shallow Sealed Subwoofer Enclosure

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Empty Single 12" Shallow Sealed Subwoofer Enclosure

• 12" Single Shallow Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Shallow construction and downward firing design
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 0.47 cubic feet

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Viper D9957V

2-Way 5-Button Remote Start and Car Alarm LED Transmitters

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2-Way 5-Button Remote Start and Car Alarm LED Transmitters

• 2-Way 5-Button Remote Start and Car Alarm LED Transmitters
• Includes (1) 2-way LED transmitter and (1) 1-way transmitter
• 1 mile range
• Compatible with Viper DS4 and DS4P security systems

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• 2-Way 5-Button Remote Start and Car Alarm LED Transmitters
• Includes (1) 2-way LED transmitter and (1) 1-way transmitter
• 1 mile range
• Compatible with Viper DS4 and DS4P security systems

Omega AU-70SL (AU-70)

Multi-Tone Siren with 20 watt output

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Multi-Tone Siren with 20 watt output

• Single or Multi-Tone Siren
• Six Tone Siren
• 20 watt Output

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• Single or Multi-Tone Siren
• Six Tone Siren
• 20 watt Output

Limited time!

NVX NE151S

Single 15" Sealed 3/4" MDF Black Carpeted Subwoofer Enclosure – 2.1 Cu. Ft. with Polyfil and NVX Logo

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Single 15" Sealed 3/4" MDF Black Carpeted Subwoofer Enclosure – 2.1 Cu. Ft. with Polyfil and NVX Logo

• 15" Single Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 2.10 cubic feet
• Premium Black Carpet with Black NVX Logo

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• 15" Single Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 2.10 cubic feet
• Premium Black Carpet with Black NVX Logo

Kicker DL7S122 (44DL7S122)

3000W Peak (1500W RMS) Loaded Dual 12" Vented Enclosure

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3000W Peak (1500W RMS) Loaded Dual 12" Vented Enclosure

• Ported enclosure with 2 12" Solo-Baric L7S Series Subwoofer
• 1500 watts RMS (3000 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 33-3/4" L x 16" H x 16-1/4" W x 19-1/2" W2

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Empty Dual 12" Truck Vented Subwoofer Enclosure

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Empty Dual 12" Truck Vented Subwoofer Enclosure

• 12" Dual Truck Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 0.69 cubic feet

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Atrend 12DM

Empty Dual 12" Medium Sealed Subwoofer Enclosure

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Empty Dual 12" Medium Sealed Subwoofer Enclosure

• 12" Dual Medium Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 2.36 cubic feet

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Alpine R2-W8D2

1000W Peak (350W RMS) 8" R2-Series Dual 2-ohm Car Subwoofer

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1000W Peak (350W RMS) 8" R2-Series Dual 2-ohm Car Subwoofer

• Peak Power: 1000 watts
• RMS Power: 350 watts
• Impedance: Dual 2 ohm
• Kevlar Reinforced Pulp Paper Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 4.56"
• Sensitivity: 83.6 dB

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Wet Sounds ST-ADP-RND 1.75

Mounting Clamps for Stealth Soundbars with 1.75" Round Tubing

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Mounting Clamps for Stealth Soundbars with 1.75" Round Tubing

• Mounting clamp for Stealth soundbars with 1.75" round tubing
• Allows soundbar mounting to the roll cage or tower tubing
• CNC'd from billet aluminum for extra durability
• Includes mounting hardware

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• Mounting clamp for Stealth soundbars with 1.75" round tubing
• Allows soundbar mounting to the roll cage or tower tubing
• CNC'd from billet aluminum for extra durability
• Includes mounting hardware

Kicker 49L7X101RK

10" SoloX Series Dual 1-ohm Recone Kit for 49L7X101 Subwoofer

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10" SoloX Series Dual 1-ohm Recone Kit for 49L7X101 Subwoofer

• 10" SoloX Series Dual 1-ohm Recone Kit
• Pre-assembled cone, surround, and voice coil
• Impedance: Dual 1-ohm
• Alignment shims are included for installation

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• 10" SoloX Series Dual 1-ohm Recone Kit
• Pre-assembled cone, surround, and voice coil
• Impedance: Dual 1-ohm
• Alignment shims are included for installation

Metra 40-UV43 Antenna Adapter

Connect your factory antenna to a new aftermarket radio

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Connect your factory antenna to a new aftermarket radio

• Antenna Adapter for Vehicles with Two Antennas
• 1 Male to 2 Female

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• Antenna Adapter for Vehicles with Two Antennas
• 1 Male to 2 Female

JL Audio XD-MAXI-40

40 A Maxi Fuse

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40 A Maxi Fuse

• Platinum-Plated Contacts
• Ultimate Circuit Protection
• High Conductivity Plating
• Maximum Current Transfer
• Designed to Fit Maxi Fuse Holders

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• Platinum-Plated Contacts
• Ultimate Circuit Protection
• High Conductivity Plating
• Maximum Current Transfer
• Designed to Fit Maxi Fuse Holders

NVX - Worth the Envy - Direct to Consumer Car Audio

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    FAQ for Universal-Fit Audio & Electronics in 1981 4000 S

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 1981 Audi 4000 S?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your 4000 S.

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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.