Garage
Shop
Account Icon
Account
Box Icon
Track
order
Telephone Icon
Call
Help Icon
Help
Door with Arrow Icon
Sign In

1985 Audi 4000

Change vehicle | Remove vehicle

Single, 1-channel monoblock sub amplifiers for when you add a sub

Overview Upgrade your Speakers Add a Subwoofer Add an Amplifier Digital Sound Processors Audio Installation & Accessories Add a Backup Camera Dads & Grads Sale

Amplifiers for Powering a Sub for 1985 Audi 4000

Some vehicles require an amp bypass module, a line-output converter like the NVX XLCA2 or AudioControl LC2i, or a DSP to integrate with your factory radio and avoid bass roll-off. Bass roll-off occurs when a factory radio's crossover is designed only for the original equipment speakers, resulting in a not complete signal being sent to your new aftermarket amp.

Filters
Amplifiers with a wiring kit ✕
Clear Filters
Reset Done
Product Type
Amplifiers with a wiring kit,
Price Range
Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
Remote bass/level controller
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
Deals
Promotions we have offer More Ways to Shop for items that are on clearance, last chance, special offer and sales, Made in America, and more!
Availability
filter-icon Filters & Sort

Rockford Fosgate M2-500X1 with Amplifier Wiring Kit

500 Watt Monoblock marine amplifier

M2-500X1, XKIT42 big
Go to item page Right Arrow Icon of Right Arrow

Rockford Fosgate M2-500X1 with Amplifier Wiring Kit

500 Watt Monoblock marine amplifier

• 300 Watts x 1 @ 4 ohm
• 500 Watts x 1 @ 2 ohm
• Element Ready™ design protects against outdoor exposure
• Conformal coated circuit board
• Top Mounted Control Panel

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

124
List price $493.98
-18% $404.98

In stock

Only 3 Left!

Add to Cart

• 300 Watts x 1 @ 4 ohm
• 500 Watts x 1 @ 2 ohm
• Element Ready™ design protects against outdoor exposure
• Conformal coated circuit board
• Top Mounted Control Panel

Rockford Fosgate R2-250X1 + Free Belva BAK42 4 Gauge Amp Wiring Kit

Prime Series 250 Watt MonoBlock Amplifier + Belva 4 Gauge Amp Kit

R2-250X1, BAK42 big
Go to item page Right Arrow Icon of Right Arrow

Rockford Fosgate R2-250X1 + Free Belva BAK42 4 Gauge Amp Wiring Kit

Prime Series 250 Watt MonoBlock Amplifier + Belva 4 Gauge Amp Kit

• 150 Watts RMS x 1 @ 4 ohm
• 250 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 250 Watts
• CEA-2006 Compliant/Preamp Outputs/LPF
• Sub Infrasonic Filter: 15 Hz - 40 Hz

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

172
List price $309.98
-19% $249.99

In stock

Add to Cart

• 150 Watts RMS x 1 @ 4 ohm
• 250 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 250 Watts
• CEA-2006 Compliant/Preamp Outputs/LPF
• Sub Infrasonic Filter: 15 Hz - 40 Hz

Massive Audio T2 with Amplifier Wiring Kit

800 Watts RMS @ 1 Ohm Monoblock Amplifier + NVX 4 Gauge Amp Wiring Kit

T2, XKIT42 big
Go to item page Right Arrow Icon of Right Arrow

Massive Audio T2 with Amplifier Wiring Kit

800 Watts RMS @ 1 Ohm Monoblock Amplifier + NVX 4 Gauge Amp Wiring Kit

• 200 Watts RMS x 1 @ 4 ohm
• 400 Watts RMS x 1 @ 2 ohm
• 800 Watts RMS x 1 @ 1 ohm
• Total Peak Power: 1600 Watts
• CEA-2006 Compliant/Preamp Outputs/LPF
• 4.25"W x 7.99"L x1.6 "H
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

125
List price $538.98
-58% $224.98

In stock

Only 2 Left!

Add to Cart

• 200 Watts RMS x 1 @ 4 ohm
• 400 Watts RMS x 1 @ 2 ohm
• 800 Watts RMS x 1 @ 1 ohm
• Total Peak Power: 1600 Watts
• CEA-2006 Compliant/Preamp Outputs/LPF
• 4.25"W x 7.99"L x1.6 "H
• Includes Amplifier Wiring Kit

Deaf Bonce MLA-800 with Amplifier Wiring Kit

790W RMS Machete Series Class-D Monoblock Amplifier

MLA-800, BAK42 big
Go to item page Right Arrow Icon of Right Arrow

Deaf Bonce MLA-800 with Amplifier Wiring Kit

790W RMS Machete Series Class-D Monoblock Amplifier

• 340 watts x 1 channel @ 4 ohm
• 540 watts x 1 channel @ 2 ohm
• 790 watts x 1 channel @ 1 ohm
• Total RMS Power: 790 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

169
List price $209.89
-17% $174.39

In stock

Only 1 Left!

Add to Cart

• 340 watts x 1 channel @ 4 ohm
• 540 watts x 1 channel @ 2 ohm
• 790 watts x 1 channel @ 1 ohm
• Total RMS Power: 790 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Alpine KTA-200M with NVX 8 Gauge Amp Kit

200W RMS Class D Monoblock Subwoofer Amplifier

KTA-200M, XKIT82 big
Go to item page Right Arrow Icon of Right Arrow

Alpine KTA-200M with NVX 8 Gauge Amp Kit

200W RMS Class D Monoblock Subwoofer Amplifier

• Power stack Capable
• CTA-2006 Compliant
• Fits in the open space behind Alpine’s iLX-W650
• 100W x 1 RMS
• 200W x 1 RMS
• 400W x 1 DPP
• Includes Amplifier Wiring Kit

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

60
List price $395.99
-17% $329.94

In stock

Add to Cart

• Power stack Capable
• CTA-2006 Compliant
• Fits in the open space behind Alpine’s iLX-W650
• 100W x 1 RMS
• 200W x 1 RMS
• 400W x 1 DPP
• Includes Amplifier Wiring Kit

Alpine KTA-30MW with NVX 8 Gauge Amp Kit

600W Peak (300W RMS) Power Pack Series Class-D Monoblock Weather Resistant Amplifier

KTA-30MW, XKIT82 big
Go to item page Right Arrow Icon of Right Arrow

Alpine KTA-30MW with NVX 8 Gauge Amp Kit

600W Peak (300W RMS) Power Pack Series Class-D Monoblock Weather Resistant Amplifier

• 300 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable Monoblock Amplifier

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

60
List price $695.99
-28% $499.95

In stock

Only 2 Left!

Add to Cart

• 300 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable Monoblock Amplifier

JVC KS-DR2001D with NVX 8 Gauge Amp Kit

300W RMS KS Series Class-D Marine/Powersports Monoblock Amplifier

KSDR2001D_XKIT82 big
Go to item page Right Arrow Icon of Right Arrow

JVC KS-DR2001D with NVX 8 Gauge Amp Kit

300W RMS KS Series Class-D Marine/Powersports Monoblock Amplifier

• 200 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• CEA-2006 Compliant
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

60
List price $454.99
-12% $398.99

In stock

Add to Cart

• 200 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• CEA-2006 Compliant
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Kenwood KAC-9106D w/Belva 1.0 Farad Capacitor + Belva 2000 Watt Handling Amp Kit

1000W RMS Class D Monoblock Car Amplifier w/ 1.0 Farad Capacitor & 4 AWG Amp Kit

BAK42BK,BB1D,KAC-9106D big
Go to item page Right Arrow Icon of Right Arrow

Kenwood KAC-9106D w/Belva 1.0 Farad Capacitor + Belva 2000 Watt Handling Amp Kit

1000W RMS Class D Monoblock Car Amplifier w/ 1.0 Farad Capacitor & 4 AWG Amp Kit

• Kenwood KAC-9106D Performance Series 1000W Class-D Monoblock Amplifier
• Belva BAK42 Complete 4 Gauge 2-Channel Amplifier Installation Kit
• Belva BB1D 1.0 Farad Capacitor
• RMS: 500W x 1 @ 4 ohm
• Premium Power and Ground Wire Provides Optimal Power Transfer

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

177
List price $539.98
-26% $400.78

Available

Ships in 10-14 days

Add to Cart

• Kenwood KAC-9106D Performance Series 1000W Class-D Monoblock Amplifier
• Belva BAK42 Complete 4 Gauge 2-Channel Amplifier Installation Kit
• Belva BB1D 1.0 Farad Capacitor
• RMS: 500W x 1 @ 4 ohm
• Premium Power and Ground Wire Provides Optimal Power Transfer

Rockford Fosgate Punch P500X1BD + Rockford Fosgate RFK4I 4 Gauge 2-Ch Amp Kit

500W RMS Punch Series Monoblock Class BD Car Power Amplifier

P500X1BD, RFK4I big
Go to item page Right Arrow Icon of Right Arrow

Rockford Fosgate Punch P500X1BD + Rockford Fosgate RFK4I 4 Gauge 2-Ch Amp Kit

500W RMS Punch Series Monoblock Class BD Car Power Amplifier

• RMS: 150W x 1 @ 4 ohm, 300W x 1 @ 2 ohm, 500W x 1 @ 1 ohm
• Total RMS Power: 500W
• CEA-2006 Compliant
• Tuned Bass EQ: 0 to +18 dB
• Super Efficient Class BD Circuitry
• Dimensions: 11"L x 7-3/4"W x 2-3/8"H
• Includes Rockford Fosgate RFK4I 4 Gauge 2-Ch Amp Kit

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

71
List price $649.98
-6% $609.98

In stock

Only 2 Left!

Add to Cart

• RMS: 150W x 1 @ 4 ohm, 300W x 1 @ 2 ohm, 500W x 1 @ 1 ohm
• Total RMS Power: 500W
• CEA-2006 Compliant
• Tuned Bass EQ: 0 to +18 dB
• Super Efficient Class BD Circuitry
• Dimensions: 11"L x 7-3/4"W x 2-3/8"H
• Includes Rockford Fosgate RFK4I 4 Gauge 2-Ch Amp Kit

Diamond Audio DMD1000.1D with NVX 4 Gauge Amp Kit

1000W RMS DMD Series Class-D Monoblock Amplifier

DMD10001D_XKIT42 big
Go to item page Right Arrow Icon of Right Arrow

Diamond Audio DMD1000.1D with NVX 4 Gauge Amp Kit

1000W RMS DMD Series Class-D Monoblock Amplifier

• 680 Watts x 1 @ 4 ohm
• 1000 Watts x 1 @ 2 ohm
• N/A @ 1 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

124
List price $593.98
-8% $546.98

In stock

Add to Cart

• 680 Watts x 1 @ 4 ohm
• 1000 Watts x 1 @ 2 ohm
• N/A @ 1 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Belva BXD3K with Amplifier Wiring Kit

3000W Peak BX-Series Class-D Monoblock Car Audio Amplifier with Bass Remote

BXD3K, BAK42BL big
Go to item page Right Arrow Icon of Right Arrow

Belva BXD3K with Amplifier Wiring Kit

3000W Peak BX-Series Class-D Monoblock Car Audio Amplifier with Bass Remote

• 750 Watts Max x 1 @ 4 ohm
• 1500 Watts Max x 1 @ 2 ohm
• 3000 Watts Max x 1 @ 1 ohm
• Total Max Power: 3000 watts Watts
• 96dB signal to noise ratio

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

66
List price $229.98
-50% $114.99

In stock

Only 1 Left!

Add to Cart

• 750 Watts Max x 1 @ 4 ohm
• 1500 Watts Max x 1 @ 2 ohm
• 3000 Watts Max x 1 @ 1 ohm
• Total Max Power: 3000 watts Watts
• 96dB signal to noise ratio

Lowest price in 30 days

Rockford Fosgate Punch P500X1BD with Amplifier Wiring Kit

500W RMS Punch Series Monoblock Class BD Car Power Amplifier + NVX 4 Gauge Wiring Kit

P500X1BD, XKIT42 big
Go to item page Right Arrow Icon of Right Arrow

Rockford Fosgate Punch P500X1BD with Amplifier Wiring Kit

500W RMS Punch Series Monoblock Class BD Car Power Amplifier + NVX 4 Gauge Wiring Kit

• RMS: 150W x 1 @ 4 ohm, 300W x 1 @ 2 ohm, 500W x 1 @ 1 ohm
• Total RMS Power: 500W
• CEA-2006 Compliant
• Tuned Bass EQ: 0 to +18 dB
• Super Efficient Class BD Circuitry
• Dimensions: 11"L x 7-3/4"W x 2-3/8"H

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

138
List price $573.98
-22% $444.98

In stock

Only 2 Left!

Add to Cart

• RMS: 150W x 1 @ 4 ohm, 300W x 1 @ 2 ohm, 500W x 1 @ 1 ohm
• Total RMS Power: 500W
• CEA-2006 Compliant
• Tuned Bass EQ: 0 to +18 dB
• Super Efficient Class BD Circuitry
• Dimensions: 11"L x 7-3/4"W x 2-3/8"H

Autotek MM-2025.1D (Mean Machine) with Belva 4 Gauge Amp Kit

2000W Peak Class D Mean Machine Series Monoblock Car Amplifier

MM20251D_BAK42 big
Go to item page Right Arrow Icon of Right Arrow

Autotek MM-2025.1D (Mean Machine) with Belva 4 Gauge Amp Kit

2000W Peak Class D Mean Machine Series Monoblock Car Amplifier

• 500 watts Peak @ 4 ohm
• 1000 watts Peak @ 2 ohm
• 2000 watts Peak @ 1 ohm
• Total Peak Power: 2000 watts
• Class D Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

169
List price $259.98
-23% $199.99

In stock

Only 1 Left!

Add to Cart

• 500 watts Peak @ 4 ohm
• 1000 watts Peak @ 2 ohm
• 2000 watts Peak @ 1 ohm
• Total Peak Power: 2000 watts
• Class D Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Cerwin-Vega CVPM1000.1D with Belva 4 Gauge Amp Kit

1000W Peak (500W RMS) CVP Series Class-D Monoblock Amplifier

CVPM10001D_BAK42 big
Go to item page Right Arrow Icon of Right Arrow

Cerwin-Vega CVPM1000.1D with Belva 4 Gauge Amp Kit

1000W Peak (500W RMS) CVP Series Class-D Monoblock Amplifier

• 310 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

169
List price $251.98
-37% $159.99

In stock

Add to Cart

• 310 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Crunch DR-1325.1 with Belva 8 Gauge Amp Kit

1325W Peak Class AB V-Drive Series Monoblock Car Subwoofer Amplifier with Bass Remote

DR13251_BAK82 big
Go to item page Right Arrow Icon of Right Arrow

Crunch DR-1325.1 with Belva 8 Gauge Amp Kit

1325W Peak Class AB V-Drive Series Monoblock Car Subwoofer Amplifier with Bass Remote

• 650 watts x 1 channel @ 4 ohm
• 1325 watts x 1 channel @ 2 ohm
• Total peak power output: 1325 watts
• Class A/B 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

97
List price $159.98
-21% $126.73

In stock

Add to Cart

• 650 watts x 1 channel @ 4 ohm
• 1325 watts x 1 channel @ 2 ohm
• Total peak power output: 1325 watts
• Class A/B 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

DS18 SXE-2500.1D/RD (Red) with Belva 4 Gauge Amp Kit

2500W Peak (800W RMS) Class D SXE Series Monoblock Car Amplifier with Bass Remote

SXE25001DRD_BAK42 big
Go to item page Right Arrow Icon of Right Arrow

DS18 SXE-2500.1D/RD (Red) with Belva 4 Gauge Amp Kit

2500W Peak (800W RMS) Class D SXE Series Monoblock Car Amplifier with Bass Remote

• 300 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• 800 watts x 1 channel @ 1 ohm
• Total RMS Power: 800 watts
• Class D 1 ohm Stable Monoblock Amplifier (Red)
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

169
List price $299.94
-12% $264.44

In stock

Only 3 Left!

Add to Cart

• 300 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• 800 watts x 1 channel @ 1 ohm
• Total RMS Power: 800 watts
• Class D 1 ohm Stable Monoblock Amplifier (Red)
• Includes Amplifier Wiring Kit

Infinity Reference 6001A with Belva 8 Gauge Amp Kit

600W RMS Reference Series Class D Monoblock Amplifier with Remote Bass Knob

REFERENCE6001A_BAK82 big
Go to item page Right Arrow Icon of Right Arrow

Infinity Reference 6001A with Belva 8 Gauge Amp Kit

600W RMS Reference Series Class D Monoblock Amplifier with Remote Bass Knob

• 350 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

97
List price $419.94
-24% $319.95

In stock

Add to Cart

• 350 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Massive Audio T2 with Belva 8 Gauge Amp Kit

1600W Peak (800W RMS) Trident Series Class D 1 Ohm Powersports Monoblock Amplifier

MAT2_BAK82 big
Go to item page Right Arrow Icon of Right Arrow

Massive Audio T2 with Belva 8 Gauge Amp Kit

1600W Peak (800W RMS) Trident Series Class D 1 Ohm Powersports Monoblock Amplifier

• 200 watts x 1 channel @ 4 ohm
• 400 watts x 1 channel @ 2 ohm
• 800 watts x 1 channel @ 1 ohm
• Total RMS Power: 800 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

98
List price $444.98
-59% $182.48

In stock

Only 2 Left!

Add to Cart

• 200 watts x 1 channel @ 4 ohm
• 400 watts x 1 channel @ 2 ohm
• 800 watts x 1 channel @ 1 ohm
• Total RMS Power: 800 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Diamond Audio MICRO81U with NVX 8 Gauge Amp Kit

600W RMS Full Range Class-D Monoblock Digital Amplifier

MICRO81U_XKIT82 big
Go to item page Right Arrow Icon of Right Arrow

Diamond Audio MICRO81U with NVX 8 Gauge Amp Kit

600W RMS Full Range Class-D Monoblock Digital Amplifier

• 175 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• 600 watts x 1 channel @ 1 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

60
List price $665.98
-25% $499.99

In stock

Only 2 Left!

Add to Cart

• 175 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• 600 watts x 1 channel @ 1 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Diamond Audio HXM800.1D with NVX 4 Gauge Amp Kit

800W RMS HXM Series Class-D Monoblock Full-Range Marine Amplifier

HXM8001D_XKIT42 big
Go to item page Right Arrow Icon of Right Arrow

Diamond Audio HXM800.1D with NVX 4 Gauge Amp Kit

800W RMS HXM Series Class-D Monoblock Full-Range Marine Amplifier

• 350 watts x 1 channel @ 4 ohm
• 550 watts x 1 channel @ 2 ohm
• 800 watts x 1 channel @ 1 ohm
• Total RMS Power: 800 watts
• Ultra-compact, high density aluminum alloy chassis provides superior thermal stability
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

124
List price $743.98
-9% $676.98

In stock

Add to Cart

• 350 watts x 1 channel @ 4 ohm
• 550 watts x 1 channel @ 2 ohm
• 800 watts x 1 channel @ 1 ohm
• Total RMS Power: 800 watts
• Ultra-compact, high density aluminum alloy chassis provides superior thermal stability
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Prev 1 2 3 4 5 Next

Items per page: 20 40 60

    Clear all
    why-shoping-with-sonic

    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
    Why Shop With Us?
    FAQ for Monoblock Sub Amplifiers in 1985 4000

    Q: Can I upgrade or change the Monoblock Sub Amplifiers in 1985 Audi 4000?

    A: Yes this page includes all the best Monoblock Sub Amplifiers that work in your 4000.

    Save up to 10 different vehicles in your garage
    Vehicle
    Store     Delete

    2017 Mercedes-Benz E-Class

    1998 Subaru 2.5 GT

    1985 Audi 4000

    2019 Toyota RAV4

    1999 GMC K3500

    2024 Chevrolet Express 2500

    2014 Fiat 500

    1968 Buick Special

    2012 Land Rover Range Rover

    1981 GMC G2500

    Add vehicle Clear all vehicles
    Where to find vehicle info
    Are you sure you want to clear your garage?
    This action cannot be undone. Confirm

    Cancel

    This category was not designed for products.
    If you continue, you will be redirected to a category customized for your vehicle. Continue

    Cancel

    Shop your 1985 4000
    Why Use a Vehicle Fit Guide?
    Change vehicle | Shop without vehicle
    Whoa! Slow down. Add your details below!
    additional information required
    Add vehicle details to confirm fitment
    Ignore fitment details
    Find stereos and more that work -- fast.
    Remove

    Can't find your vehicle? Click here and we'll help.

    Where to find vehicle info

    Go to Fitment

    Didn't find your car?

    Submit your details and we'll help!
    Please enter the letters as they are shown in the image above. Letters are not case-sensitive.
    Identify your vehicle and submodel details
    • Owner's manual
    • Vehicle's insurance card
    • Vehicle registration
    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
    Car Info Side Door Icon
    Vehicle Registration Icon
    Vehicle Insurance Icon
    Back

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

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

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

    Back
    Track your order
    Call our experts
    Support Center
    Return & Exchanges
    Follow on Instagram Instagram logo
    Subscribe on YouTube YouTube logo