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1984 Audi 4000

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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 1984 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.

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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.
Amplifier Key Features
Amplifiers can offer a diverse array of features. If you select more than one feature, then you will view amplifiers that have ALL features selected. These include speaker-level inputs that facilitate seamless integration with factory audio systems, Bluetooth connectivity suitable for ATV/UTV or Classic vehicle setups, built-in DSPs that provide enhanced control over your audio signal, and a host of other functionalities to explore.
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.
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.
Series
Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.
Power Series (17)
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X Series (1)
XFL Series (1)
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.
Sonic Certified Amplifier
Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.
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.

Amp Bluetooth Connectivity
This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.
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Kicker 46CXA800.1 with Amp Kit and 3 Year Warranty

800W Peak (600W RMS) CX Series Class-D Monoblock Amplifier with 4 Gauge Amp Kit

CXA800.1, 46CK4 big
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Kicker 46CXA800.1 with Amp Kit and 3 Year Warranty

800W Peak (600W RMS) CX Series Class-D Monoblock Amplifier with 4 Gauge Amp Kit

• 300 Watts RMS x 1 @ 4 ohm
• 600 Watts RMS x 1 @ 2 ohm
• 800 Watts RMS x 1 @ 1 ohm
• Efficient Class-D Monoblock Amplifier
• KickEQ™ 6dB variable bass boost for those additional low frequencies
• FIT+™ (Fail-safe Integration Technology-PLUS) means it works with nearly every radio
• Amplifier wiring kit included

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• 300 Watts RMS x 1 @ 4 ohm
• 600 Watts RMS x 1 @ 2 ohm
• 800 Watts RMS x 1 @ 1 ohm
• Efficient Class-D Monoblock Amplifier
• KickEQ™ 6dB variable bass boost for those additional low frequencies
• FIT+™ (Fail-safe Integration Technology-PLUS) means it works with nearly every radio
• Amplifier wiring kit included

JL Audio JD250/1 with Belva 8 Gauge Amp Kit

250W RMS JD Series Class-D Monoblock Amplifier

JD2501_BAK82 big
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JL Audio JD250/1 with Belva 8 Gauge Amp Kit

250W RMS JD Series Class-D Monoblock Amplifier

• 150 watts x 1 channel @ 4 ohm
• 250 watts x 1 channel @ 2 ohm
• Total RMS Power: 250 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 150 watts x 1 channel @ 4 ohm
• 250 watts x 1 channel @ 2 ohm
• Total RMS Power: 250 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Rockford Fosgate M5-1000X1with NVX 8 Gauge Amp Kit

750W RMS M5-Series Class-BD Monoblock Marine Amplifier

M51000X1_XKIT82 big
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Rockford Fosgate M5-1000X1with NVX 8 Gauge Amp Kit

750W RMS M5-Series Class-BD Monoblock Marine Amplifier

• 500 watts x 1 channel @ 4 ohm
• 750 watts x 1 channel @ 2 ohm
• 1000 watts x 1 channel @ 1 ohm (Dynamic Power)
• Total RMS Power: 750 watts
• Class BD 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 500 watts x 1 channel @ 4 ohm
• 750 watts x 1 channel @ 2 ohm
• 1000 watts x 1 channel @ 1 ohm (Dynamic Power)
• Total RMS Power: 750 watts
• Class BD 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

MTX PS800.1

800W RMS Class D PS Series Monoblock Powersports Amplifier with Bass Remote

PS800.1 big
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MTX PS800.1

800W RMS Class D PS Series Monoblock Powersports Amplifier with Bass Remote

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

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

Belva BXD3K with Amplifier Wiring Kit

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

BXD3K, BAK42BL big
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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

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• 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

Cerwin Vega CVP1600.1D with Belva 8 Gauge Amp Kit

CVP Series Monoblock Class-D Amplifier

CVP1600.1D, BAK82BL big
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Cerwin Vega CVP1600.1D with Belva 8 Gauge Amp Kit

CVP Series Monoblock Class-D Amplifier

• CVP Series Monoblock Amplifier
• 200W RMS X 1 @ 2Ω / 120W RMS X 1 @ 4Ω
• 1-Ohm Stable Class D Monoblock Operation
• Direct Short, Thermal, & Overload Circuits Protect Amplifier
• 200mV-6V High Level or Low Level RCA Input
• Includes Amplifier Wiring Kit

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• CVP Series Monoblock Amplifier
• 200W RMS X 1 @ 2Ω / 120W RMS X 1 @ 4Ω
• 1-Ohm Stable Class D Monoblock Operation
• Direct Short, Thermal, & Overload Circuits Protect Amplifier
• 200mV-6V High Level or Low Level RCA Input
• Includes Amplifier Wiring Kit

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
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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

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• 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

Deaf Bonce MLA-1500 with Belva 4 Gauge Amp Kit

1480W RMS Machete Series Class-D Monoblock Amplifier

MLA-1500, BAK42 big
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Deaf Bonce MLA-1500 with Belva 4 Gauge Amp Kit

1480W RMS Machete Series Class-D Monoblock Amplifier

• 540 watts x 1 channel @ 4 ohm
• 920 watts x 1 channel @ 2 ohm
• 1480 watts x 1 channel @ 1 ohm
• Total RMS Power: 1480 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Belva BAK42 4 Gauge Amp Wiring Kit

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• 540 watts x 1 channel @ 4 ohm
• 920 watts x 1 channel @ 2 ohm
• 1480 watts x 1 channel @ 1 ohm
• Total RMS Power: 1480 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Belva BAK42 4 Gauge Amp Wiring Kit

Rockford Fosgate Power T1000-1bdCP + NVX XKIT42 4 Gauge Amp Wiring Kit

1000W RMS Power Series Constant Power Monoblock Class BD Amplifier

T1000-1bdCP, XKIT42 big
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Rockford Fosgate Power T1000-1bdCP + NVX XKIT42 4 Gauge Amp Wiring Kit

1000W RMS Power Series Constant Power Monoblock Class BD Amplifier

• RMS: 700W x 1 @ 4 ohm, 1000W x 1 @ 2 ohm, 1000W x 1 @ 1 ohm
• Total RMS Power: 1000W
• CEA-2006 Compliant
• Variable Bass Boost: 0 to +18 dB at 45 Hz
• Ultra Efficient Class bD Circuitry
• Dimensions: 13-11/16"L x 8-3/16"W x 2-3/16"H
• Includes NVX XKIT42 4 Gauge Amp Wiring Kit

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• RMS: 700W x 1 @ 4 ohm, 1000W x 1 @ 2 ohm, 1000W x 1 @ 1 ohm
• Total RMS Power: 1000W
• CEA-2006 Compliant
• Variable Bass Boost: 0 to +18 dB at 45 Hz
• Ultra Efficient Class bD Circuitry
• Dimensions: 13-11/16"L x 8-3/16"W x 2-3/16"H
• Includes NVX XKIT42 4 Gauge Amp Wiring Kit

Rockford Fosgate R2-500X1 with Amplifier Wiring Kit

500W Peak Prime Series Class-D Monoblock Car Amplifier

R2-500X1, XKIT42 big
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Rockford Fosgate R2-500X1 with Amplifier Wiring Kit

500W Peak Prime Series Class-D Monoblock Car Amplifier

• 300 Watts RMS x 1 @ 4 ohm
• 500 Watts RMS x 1 @ 2 ohm
• CEA-2006 Compliant
• Top Mounted Control Panel
• Class-D Amplifier
• Includes Amplifier Wiring Kit

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• 300 Watts RMS x 1 @ 4 ohm
• 500 Watts RMS x 1 @ 2 ohm
• CEA-2006 Compliant
• Top Mounted Control Panel
• Class-D Amplifier
• Includes Amplifier Wiring Kit

Alpine S2-A60M with Belva 4 Gauge Amp Kit

600W RMS S-Series Class-D Monoblock Car Amplifier

S2-A60M, BAK42 big
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Alpine S2-A60M with Belva 4 Gauge Amp Kit

600W RMS S-Series Class-D Monoblock Car Amplifier

• 330 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• Class D 2 ohm Stable Monoblock Amplifier

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• 330 watts x 1 channel @ 4 ohm
• 600 watts x 1 channel @ 2 ohm
• Class D 2 ohm Stable Monoblock Amplifier

Rockford Fosgate Power T1000-1bdCP (Open Box, Great)

1000W RMS Class BD Power Series Monoblock Car Amplifier

T1000-1bdCP big
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Rockford Fosgate Power T1000-1bdCP (Open Box, Great)

1000W RMS Class BD Power Series Monoblock Car Amplifier

• 700 watts x 1 channel @ 4 ohm
• 1000 watts x 1 channel @ 2 ohm
• 1000 watts x 1 channel @ 1 ohm
• Total RMS Power: 1000 watts
• Class BD 1 ohm Stable Monoblock Amplifier

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JBL ClubA1000 (Club A 1000) + 30% off High Quality NVX Amp Kit

High Performance Mono-block Subwoofer Amplifier

AMPCBA1000AM, XKIT42 big
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JBL ClubA1000 (Club A 1000) + 30% off High Quality NVX Amp Kit

High Performance Mono-block Subwoofer Amplifier

• Class D Amp Technology
• 4 Ohm: 600 Watts RMS x 1
• 2 Ohm: 1000 Watts RMS x 1
• Variable Crossover and Bass Boost
• Turn-On Mode Switch

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• Class D Amp Technology
• 4 Ohm: 600 Watts RMS x 1
• 2 Ohm: 1000 Watts RMS x 1
• Variable Crossover and Bass Boost
• Turn-On Mode Switch

Deaf Bonce MLA-800 with Amplifier Wiring Kit

790W RMS Machete Series Class-D Monoblock Amplifier

MLA-800, BAK42 big
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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

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• 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

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
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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

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• 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

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
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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

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• 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

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
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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

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• 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

Crunch DR-3725.1D with Belva 4 Gauge Amp Kit

3725W Peak Class D V-Drive Series Monoblock Car Subwoofer Amplifier with Bass Remote

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Crunch DR-3725.1D with Belva 4 Gauge Amp Kit

3725W Peak Class D V-Drive Series Monoblock Car Subwoofer Amplifier with Bass Remote

• 930 watts x 1 channel @ 4 ohm
• 1860 watts x 1 channel @ 2 ohm
• 3725 watts x 1 channel @ 1 ohm
• Total peak power output: 3725 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 930 watts x 1 channel @ 4 ohm
• 1860 watts x 1 channel @ 2 ohm
• 3725 watts x 1 channel @ 1 ohm
• Total peak power output: 3725 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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Deaf Bonce Apocalypse 1600.1 Pro with Belva 4 Gauge Amp Kit

1600W RMS Class D Apocalypse Atom Pro Series Monoblock Subwoofer Amplifier with Bass Remote

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Deaf Bonce Apocalypse 1600.1 Pro with Belva 4 Gauge Amp Kit

1600W RMS Class D Apocalypse Atom Pro Series Monoblock Subwoofer Amplifier with Bass Remote

• 550 watts x 1 channel @ 4 ohm
• 1010 watts x 1 channel @ 2 ohm
• 1600 watts x 1 channel @ 1 ohm
• Total RMS Power: 1600 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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Universal Icon Universal – fits most vehicles.

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-12% $254.39

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• 550 watts x 1 channel @ 4 ohm
• 1010 watts x 1 channel @ 2 ohm
• 1600 watts x 1 channel @ 1 ohm
• Total RMS Power: 1600 watts
• Class D 1 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

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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.

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-12% $264.44

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• 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

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    FAQ for Monoblock Sub Amplifiers in 1984 4000

    Q: Can I upgrade or change the Monoblock Sub Amplifiers in 1984 Audi 4000?

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

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