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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 VAD10004v1 Version 1 (Like New (Open Box))

1000W RMS Full Range Class D 4-Channel Car/Marine/Powersports Amplifier

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1000W RMS Full Range Class D 4-Channel Car/Marine/Powersports Amplifier

• 150 watts x 4 channel @ 4 ohm
• 250 watts x 4 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm
• Total RMS Power: 1000 watts
• CEA-2006 Compliant
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

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Orion HCCA122

10000W Peak (2500W RMS) 12" HCCA Series Dual 2-ohm Competition Car Subwoofer

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10000W Peak (2500W RMS) 12" HCCA Series Dual 2-ohm Competition Car Subwoofer

• Peak Power: 10000 watts
• RMS Power: 2500 watts
• Impedance: Dual 2 ohm
• Moisture and UV-resistant Paper cone
• Nitrile Butadiene Rubber (NBR)-Foam surround
• Mount depth: 10.28"
• Sensitivity: 84.22 dB

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• Peak Power: 10000 watts
• RMS Power: 2500 watts
• Impedance: Dual 2 ohm
• Moisture and UV-resistant Paper cone
• Nitrile Butadiene Rubber (NBR)-Foam surround
• Mount depth: 10.28"
• Sensitivity: 84.22 dB

Sundown Audio M-12 D1 12" (M12D1)

4000W Peak (2000W RMS) 12" M Series Dual 1-ohm Car Subwoofer (SW-M12D1)

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4000W Peak (2000W RMS) 12" M Series Dual 1-ohm Car Subwoofer (SW-M12D1)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 1 ohm
• Polypropylene Cone
• High Roll Foam Surround
• Mount depth: 10.88"
• Sensitivity: 84.387 dB

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Rockford Fosgate RFFM80

80 Amp Maxi Fuse

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80 Amp Maxi Fuse

• Maxi Fuse
• Power Rating: 80 Amps
• Platinum-Plated Contacts
• Ultimate Circuit Protection
• High Conductivity Plating
• Maximum Current Transfer
• Designed to Fit Maxi Fuse Holders

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• Maxi Fuse
• Power Rating: 80 Amps
• Platinum-Plated Contacts
• Ultimate Circuit Protection
• High Conductivity Plating
• Maximum Current Transfer
• Designed to Fit Maxi Fuse Holders

NAV-TV SVS-6 (NTV-KIT592)

Universal Smart Video Switcher with 6 video inputs for Integrating Multiple Aftermarket Cameras to a Monitor

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Universal Smart Video Switcher with 6 video inputs for Integrating Multiple Aftermarket Cameras to a Monitor

• For OEM* & Aftermarket screens
• Turn signal camera activation timed to 12 seconds or continuous activation
• Selectable Rear View Camera Priority
• Selectable Turn Signal Cameras have priority over the rear

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• For OEM* & Aftermarket screens
• Turn signal camera activation timed to 12 seconds or continuous activation
• Selectable Rear View Camera Priority
• Selectable Turn Signal Cameras have priority over the rear

Crux CTM-11YBM

Commercial Grade Top Mount Camera with 1/3" Sony CCD Sensor, IR LEDs and Built-in Microphone

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Commercial Grade Top Mount Camera with 1/3" Sony CCD Sensor, IR LEDs and Built-in Microphone

• Commercial Grade Top Mount Camera
• Features built-in microphone
• Mounting Style: Surface Mount
• Viewing Angle: 150 °
• Pixel Resolution: 975 x 582  (NTSC)
• Waterproof: Yes (IP68 rated)
• Nightvision: Infrared LED's (18 LEDs)

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• Commercial Grade Top Mount Camera
• Features built-in microphone
• Mounting Style: Surface Mount
• Viewing Angle: 150 °
• Pixel Resolution: 975 x 582  (NTSC)
• Waterproof: Yes (IP68 rated)
• Nightvision: Infrared LED's (18 LEDs)

Cerwin-Vega BTR17

RPM Marine Bluetooth Controller and Receiver

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RPM Marine Bluetooth Controller and Receiver

• RPM marine Bluetooth audio controller and receiver
• Plays digital music and stream internet radio
• Complete wireless connection with low current draw
• Water resistant touch keypad for marine applications
• 1" Mounting hole depth diameter

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• RPM marine Bluetooth audio controller and receiver
• Plays digital music and stream internet radio
• Complete wireless connection with low current draw
• Water resistant touch keypad for marine applications
• 1" Mounting hole depth diameter

Metra 44-UT10 Antenna

Universal Top Mount Replacement Antenna for AM/FM Bands

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Universal Top Mount Replacement Antenna for AM/FM Bands

• Replacement Antenna for AM/FM Bands
• Top Mount Design Made For 1" Hole

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• Replacement Antenna for AM/FM Bands
• Top Mount Design Made For 1" Hole

Crimestopper SPTX-42

1-Way 5-Button Remote Start Keyless Entry Replacement LED Remote

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1-Way 5-Button Remote Start Keyless Entry Replacement LED Remote

• 1-Way 5-Button Replacement LED Remote
• Up to 1500 feet of range (0.28 miles)
• Replacement remote for SP-402

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• 1-Way 5-Button Replacement LED Remote
• Up to 1500 feet of range (0.28 miles)
• Replacement remote for SP-402

Diamond Audio DES500.1D

500W RMS Class D Diamond Elite Series Monoblock Car Amplifier with Bass Remote

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500W RMS Class D Diamond Elite Series Monoblock Car Amplifier with Bass Remote

• 400 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• 500 watts x 1 channel @ 1 ohm
• Total RMS Power: 500 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Atrend 12TKD

Empty Dual 12" Truck Sealed Subwoofer Enclosure

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Empty Dual 12" Truck Sealed Subwoofer Enclosure

• 12" Dual Truck Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Universal truck (wedge) enclosure design
• Miter and Dado construction
• Premium black carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 1.38 cubic feet

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JL Audio PS-SWMCP-B-3.000

Enclosed Speaker System Swivel Mount - 3.000"

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Enclosed Speaker System Swivel Mount - 3.000"

• Low-Profile Machined Fixtures
• Mounts VeX Pods to Roll Cage
• Pipe diameter fitment: 3.000"
• Color: Black

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• Low-Profile Machined Fixtures
• Mounts VeX Pods to Roll Cage
• Pipe diameter fitment: 3.000"
• Color: Black

T-Spec V-BATT-TML

Battery Terminal 4 Position POS/NEG

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Battery Terminal 4 Position POS/NEG

• (2) 1/0 AWG - 10 AWG plus (2) 4 AWG - 10 AWG Out
• Compact design for simpler installation
• Solid brass construction for maximum conductivity
• Nickel finish for durability

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• (2) 1/0 AWG - 10 AWG plus (2) 4 AWG - 10 AWG Out
• Compact design for simpler installation
• Solid brass construction for maximum conductivity
• Nickel finish for durability

Diamond Audio M01SWT

200W Peak (100W RMS) 1" MotorSport Series 4-ohm Pro Audio Swivel Tweeters

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200W Peak (100W RMS) 1" MotorSport Series 4-ohm Pro Audio Swivel Tweeters

• 1" Pro-Audio Swivel Tweeters
• 100 watts Peak Each
• 50 watts RMS Each
• 4 ohm Impedance

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• 1" Pro-Audio Swivel Tweeters
• 100 watts Peak Each
• 50 watts RMS Each
• 4 ohm Impedance

Alpine KTX-LK8

Front and Rear Linking Bracket for 8" Alpine PrismaLink Subwoofer Enclosures

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Front and Rear Linking Bracket for 8" Alpine PrismaLink Subwoofer Enclosures

• Linking bracket for two or more 8" Alpine PrismaLink subwoofer enclosures
• Fits the S2-SB8 subwoofer enclosure
• Heavy-duty steel front link bracket and rear link bracing
• RGB wiring harness for lighting bars
• All hardware included

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• Linking bracket for two or more 8" Alpine PrismaLink subwoofer enclosures
• Fits the S2-SB8 subwoofer enclosure
• Heavy-duty steel front link bracket and rear link bracing
• RGB wiring harness for lighting bars
• All hardware included

Wet Sounds REVO 8 FA SW-W GRILLE V3

Grille for Wet Sounds 8" REVO 8 FA Marine Subwoofers (White)

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Grille for Wet Sounds 8" REVO 8 FA Marine Subwoofers (White)

• 8" Marine Subwoofer Grille
• White SW grille design
• REVO 8 FA marine subwoofers sold separately

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• 8" Marine Subwoofer Grille
• White SW grille design
• REVO 8 FA marine subwoofers sold separately

Wet Sounds REVO 8 FA XW-B GRILLE V3

Grille for Wet Sounds 8" REVO 8 FA Marine Subwoofers (White)

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Grille for Wet Sounds 8" REVO 8 FA Marine Subwoofers (White)

• 8" Marine Subwoofer Grille
• Black XW grille design
• REVO 8 FA marine subwoofers sold separately

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• 8" Marine Subwoofer Grille
• Black XW grille design
• REVO 8 FA marine subwoofers sold separately

Kicker MSLCEXT4 (51MSLCEXT4)

13 ft. Extension Cable for MSLC RGBW LED Lighting Controller

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13 ft. Extension Cable for MSLC RGBW LED Lighting Controller

• 13.12 feet (4 meter) extension cable for MSLC LED Controller
• Moves MSLC controller to another installation site
• Can be used as a replacement cable for MSLC
• Plug and play connection

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• 13.12 feet (4 meter) extension cable for MSLC LED Controller
• Moves MSLC controller to another installation site
• Can be used as a replacement cable for MSLC
• Plug and play connection

Kicker KMWPR820 (47KMWPR820)

20 ft. 8 Gauge Full-Spec Hyper-Flex Marine Power Wire (Red)

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20 ft. 8 Gauge Full-Spec Hyper-Flex Marine Power Wire (Red)

• 8 gauge Power Cable
• OFC (100% Oxygen-Free Copper) material
• Full-spec hyper-flex cable design
• Plated in anti-corrosive 99.9% tin
• Length: 20 feet (6 meter)

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• 8 gauge Power Cable
• OFC (100% Oxygen-Free Copper) material
• Full-spec hyper-flex cable design
• Plated in anti-corrosive 99.9% tin
• Length: 20 feet (6 meter)

Stinger SPXRZR4242

Polaris RZR Dual Amplifier Installation Kit 2014-Present Polaris RZR 900/1000

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Polaris RZR Dual Amplifier Installation Kit 2014-Present Polaris RZR 900/1000

• Pre-cut and loomed power/ ground & speaker wire harnesses
• 4GA into dual 8GA power / ground wire
• 150 amp MIDI fuse
•Fusing and pre-terminated wiring

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Diamond Audio MICRO85U

1035W RMS Class D Micro8U Series 5-Channel Full Range Car Amplifier

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1035W RMS Class D Micro8U Series 5-Channel Full Range Car Amplifier

• + @ 4 ohm
• 85 watts x 1 channel + 375 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 1 channel @ 4 ohm + 375 watts x 1 channel @ 2 ohm
• Total RMS Power: 1035 watts
• Class D 2 ohm Stable 5-Channel-Channel Amplifier

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PAC BARA07

Universal Rubber Mast Antenna

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Universal Rubber Mast Antenna

• Universal rubber mast top side mount antenna
• Support and elevate an antenna for AM/FM
• Features 1" swivel base for easy adjustment

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• Universal rubber mast top side mount antenna
• Support and elevate an antenna for AM/FM
• Features 1" swivel base for easy adjustment

VIPER D9146V

1-Way 4-Button Keyless Entry and Car Alarm LED Transmitters

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1-Way 4-Button Keyless Entry and Car Alarm LED Transmitters

• 1-Way Keyless Entry and Car Alarm LED Transmitters
• Includes (2) 1-way transmitters
• 1/4 mile range for 2-way remote
• Compatible with Viper DS4 and DS4P security systems

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• 1-Way Keyless Entry and Car Alarm LED Transmitters
• Includes (2) 1-way transmitters
• 1/4 mile range for 2-way remote
• Compatible with Viper DS4 and DS4P security systems

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NVX VADM4 Version 2 (VADM4v2) (Open Box, Great)

500W RMS V-Series Micro Full-Range Class D 4-Channel Amplifier Car/Marine/Powersports Amplifier

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500W RMS V-Series Micro Full-Range Class D 4-Channel Amplifier Car/Marine/Powersports Amplifier

• 80 watts x 4 channel @ 4 ohm
• 125 watts x 4 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

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Sound Extreme by ECOXGEAR SEI-SECSTRX

Extreme EcoCast Receiver

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Extreme EcoCast Receiver

• Power Input: 12V, 5A
• Dual receiver modes: EcoCast and Bluetooth
• Connect to any audio product with audio input jacks

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• Power Input: 12V, 5A
• Dual receiver modes: EcoCast and Bluetooth
• Connect to any audio product with audio input jacks

AudioControl ACR-3 REMOTE

Dash Mount Wired Remote Bass Controller for AudioControl Amplifiers and Processors

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Dash Mount Wired Remote Bass Controller for AudioControl Amplifiers and Processors

• Wired Bass Remote Controller
• Compatible with AudioControl LC8i, DQ61, DQ/DX and The Epicenter processors
• Dash-mountable installation
• Color: Black

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• Wired Bass Remote Controller
• Compatible with AudioControl LC8i, DQ61, DQ/DX and The Epicenter processors
• Dash-mountable installation
• Color: Black

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NVX VCW10GR

Mesh Grille for NVX 10" VC-Series V1 and V2 Subwoofers

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Mesh Grille for NVX 10" VC-Series V1 and V2 Subwoofers

• Mesh grille for select NVX 10" subwoofers
Does not work with NVX VC-series V3 subs
• Designed to fit NVX VC-series V1 and V2 subwoofers
• Pre-drilled bolt pattern

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• Mesh grille for select NVX 10" subwoofers
Does not work with NVX VC-series V3 subs
• Designed to fit NVX VC-series V1 and V2 subwoofers
• Pre-drilled bolt pattern

NVX VSLR60

60-Ohm Load Resistors for 2018-up Dodge/Chrysler/Jeep/RAM/Fiat vehicles with Amplified Systems

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60-Ohm Load Resistors for 2018-up Dodge/Chrysler/Jeep/RAM/Fiat vehicles with Amplified Systems

• 60 Ohm Load Resistors
• Prevents Audio Shutdown and Distortion
• Compatible with most devices with speaker-level inputs
• Works in select 2018-up Chrysler-built vehicles
• Sold as a pair

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$13.49 with coupon | Price details
2026-07-12 23:59:00
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• 60 Ohm Load Resistors
• Prevents Audio Shutdown and Distortion
• Compatible with most devices with speaker-level inputs
• Works in select 2018-up Chrysler-built vehicles
• Sold as a pair

Boss WP6

72" RGB LED Antenna Whip with Remote Control

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72" RGB LED Antenna Whip with Remote Control

• 72" RGB LED Antenna Whip with Remote Control
• 360-degree illumination for more visibility
• 20 color combinations and 15 brightness levels
• IP67 marine grade rating

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• 72" RGB LED Antenna Whip with Remote Control
• 360-degree illumination for more visibility
• 20 color combinations and 15 brightness levels
• IP67 marine grade rating

Kicker BT4 (46BT4)

Positive or Negative Brass Battery Terminal with Two 1/0-8 Gauge and One 4-8 Gauge Output

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Positive or Negative Brass Battery Terminal with Two 1/0-8 Gauge and One 4-8 Gauge Output

• BT4 Pos/Neg Battery Terminal. (2) 1/0-8AWG, (1) 4-8AWG
• (2) 1/0-4 Gauge out
• 4-8 Gauge out
• Brass construction

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• BT4 Pos/Neg Battery Terminal. (2) 1/0-8AWG, (1) 4-8AWG
• (2) 1/0-4 Gauge out
• 4-8 Gauge out
• Brass construction

Race Sport Accessories HOODKIT1

LED Knight Rider Scanning Hood Brow DRL Flex Kit for Truck and SUV

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LED Knight Rider Scanning Hood Brow DRL Flex Kit for Truck and SUV

• Life Expectancy: 50,000 hours
• 12-Watts
• IP67 rating
• Cool White (Color Temperature)
• Beam Pattern: Linear

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• Life Expectancy: 50,000 hours
• 12-Watts
• IP67 rating
• Cool White (Color Temperature)
• Beam Pattern: Linear

Crimestopper SV-8600.TS

High-Definition Universal Style 3.5" Touch Screen LCD Color Monitor

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High-Definition Universal Style 3.5" Touch Screen LCD Color Monitor

• HD digital color LCD < /br> • Video System: NTSC / PAL < /br> • LED backlight < /br> • Dashboard or Windshield mount < /br> • Selectable forward facing and reverse facing image

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List price $189.95
-42% $109.99

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• HD digital color LCD < /br> • Video System: NTSC / PAL < /br> • LED backlight < /br> • Dashboard or Windshield mount < /br> • Selectable forward facing and reverse facing image

Sundown Audio 4S100

100 ft 4-gauge Power Wire (Silver)

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100 ft 4-gauge Power Wire (Silver)

• 100 feet 4 gauge Power Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Silver
• 2058 strands with flexible PVC insulation

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-17% $369.99

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• 100 feet 4 gauge Power Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Silver
• 2058 strands with flexible PVC insulation

Limited time!

NVX NE102P Empty Dual 10" Vented Enclosure

Empty Dual 10" Vented Subwoofer Enclosure with 3/4" MDF, Carpet Finish and Polyfill

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Empty Dual 10" Vented Subwoofer Enclosure with 3/4" MDF, Carpet Finish and Polyfill

• 10" Dual Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 2.90 cubic feet
• Premium Black Carpet with Black NVX Logo

Purchase $400 or More of NVX and Save 15%!
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-17% $129.99

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• 10" Dual Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 2.90 cubic feet
• Premium Black Carpet with Black NVX Logo

Earthquake Sound Mini D2000

2000W Peak (1200W RMS) Class D MiNi Series Monoblock Car Amplifier

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2000W Peak (1200W RMS) Class D MiNi Series Monoblock Car Amplifier

• 650 watts x 1 channel @ 4 ohm
• 1000 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable Monoblock Amplifier

2+ offers available
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$345.99

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Available Offers (2) for Earthquake Sound Mini D2000
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Cerwin-Vega BTR5

RPM Panel Rocker Switch Marine Bluetooth Controller and Receiver

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RPM Panel Rocker Switch Marine Bluetooth Controller and Receiver

• RPM panel rocker switch Bluetooth audio controller and receiver
• Integrated Bluetooth 5.0 (A2DP, AVRCP, HFP, HID)
• Water resistant touch keypad for marine applications
• Mounts into a standard carling opening

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List price $119.99
-17% $99.99

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• RPM panel rocker switch Bluetooth audio controller and receiver
• Integrated Bluetooth 5.0 (A2DP, AVRCP, HFP, HID)
• Water resistant touch keypad for marine applications
• Mounts into a standard carling opening

JBL SHOCK WAVE 4T

140W Peak (70W RMS) 4" 4-ohm Pro Audio Bullet Horn Tweeters

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140W Peak (70W RMS) 4" 4-ohm Pro Audio Bullet Horn Tweeters

• 4" Titanium Pro-Audio Bullet Horn Super Tweeters
• 70 watts Peak Each
• 35 watts RMS Each
• 4 ohm Impedance

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• 4" Titanium Pro-Audio Bullet Horn Super Tweeters
• 70 watts Peak Each
• 35 watts RMS Each
• 4 ohm Impedance

NVX VUBT2v2 (VUBT2 Version 2) (Open Box, Great)

Universal Waterproof Bluetooth Audio Receiver for Cars, Vehicles, Motorcycles/ATVs & Marine/Boat Use (V-Series)

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Universal Waterproof Bluetooth Audio Receiver for Cars, Vehicles, Motorcycles/ATVs & Marine/Boat Use (V-Series)

• Bluetooth Profile: A2DP (High-Quality, Stereo Audio)
• Bluetooth Core Specification: Version 4.0 with aptX
• Outputs One Stereo Pair, Low-Level RCA Plugs
• Output Voltage: 2V RMS
• Signal to Noise Ratio: 93 dB (20 Hz - 20 kHz)
• Input Operating Voltage: 8 - 28 VDC

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• Bluetooth Profile: A2DP (High-Quality, Stereo Audio)
• Bluetooth Core Specification: Version 4.0 with aptX
• Outputs One Stereo Pair, Low-Level RCA Plugs
• Output Voltage: 2V RMS
• Signal to Noise Ratio: 93 dB (20 Hz - 20 kHz)
• Input Operating Voltage: 8 - 28 VDC

Boss BAFLG1

Red Flag with Boss Audio Logo for Boss LED Whips

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Red Flag with Boss Audio Logo for Boss LED Whips

• Boss Audio flag for select LED whips
• Ideal for electric scooter, bikes, scooters, ATVs and more
• Designed for Boss Audio LED whips (Sold separately)

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-19% $34.99

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• Boss Audio flag for select LED whips
• Ideal for electric scooter, bikes, scooters, ATVs and more
• Designed for Boss Audio LED whips (Sold separately)

Heise HE-MUMRK-6WA

4.9in 6 LED WORK LIGHT - 1/2 WHITE 1/2 AMBER

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4.9in 6 LED WORK LIGHT - 1/2 WHITE 1/2 AMBER

• Bi-color white and amber LEDs
• 16 self-controlled patterns with memory that can be synced with multiple units (of the same lighting model)
• IP Rating: IP65
• (6) 3-Watt LEDs

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List price $109.99
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• Bi-color white and amber LEDs
• 16 self-controlled patterns with memory that can be synced with multiple units (of the same lighting model)
• IP Rating: IP65
• (6) 3-Watt LEDs

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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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