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2013 Audi S8

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Use our shopping filters to find the right 2/3/4-channel amp to power upgraded speakers properly.

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

Amps for Adding Speakers for 2013 Audi S8

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.
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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.
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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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NVX MVPA2 (Open Box, Great)

600W RMS Marine-V Series 2-Channel Class D Compact Marine/Powersports/Motorcycle Amplifier

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NVX MVPA2 (Open Box, Great)

600W RMS Marine-V Series 2-Channel Class D Compact Marine/Powersports/Motorcycle Amplifier

• 200 Watts RMS x 2 @ 4 ohm
• 300 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Micro Amplifier
• Weatherproof Amplifier
• 9.7"W x 4.4"L x 1.7"H

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• 200 Watts RMS x 2 @ 4 ohm
• 300 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Micro Amplifier
• Weatherproof Amplifier
• 9.7"W x 4.4"L x 1.7"H

MTX MA1400.5

1400W RMS Class D MA Series 5-Channel Marine Amplifier with Bass Remote

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MTX MA1400.5

1400W RMS Class D MA Series 5-Channel Marine Amplifier with Bass Remote

• 100 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 150 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• 800 watts x 1 channel @ 1 ohm (sub)
• Bridged: 300 watts x 2 channel @ 4 ohm + 800 watts x 1 channel @ 1 ohm
• Total RMS Power: 1400 watts
• Class D 1 ohm Stable 5-Channel Amplifier

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• 100 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 150 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• 800 watts x 1 channel @ 1 ohm (sub)
• Bridged: 300 watts x 2 channel @ 4 ohm + 800 watts x 1 channel @ 1 ohm
• Total RMS Power: 1400 watts
• Class D 1 ohm Stable 5-Channel Amplifier

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Cerwin-Vega H400.2D

400W RMS Class D HED Series 2 Channel Car Amplifier

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Cerwin-Vega H400.2D

400W RMS Class D HED Series 2 Channel Car Amplifier

• 80 watts x 2 channel @ 4 ohm
• 125 watts x 2 channel @ 2 ohm
• Bridged: 290 watts x 1 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 1 ohm Stable 2-Channel Amplifier

Save 30% on an NVX XKIT42 Amp Kit with Purchase!
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NVX XAPK4 + XIV25 (XKIT42 Sub)

NVX XAPK4 + XIV25 (XKIT42 Sub)

$114.99

$80.49

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• 80 watts x 2 channel @ 4 ohm
• 125 watts x 2 channel @ 2 ohm
• Bridged: 290 watts x 1 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 1 ohm Stable 2-Channel Amplifier

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JL Audio MV600/2i

600W RMS Class D MVi Series 2 Channel Marine Amplifier

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JL Audio MV600/2i

600W RMS Class D MVi Series 2 Channel Marine Amplifier

• 180 watts x 2 channel @ 4 ohm
• 300 watts x 2 channel @ 2 ohm
• Bridged: 600 watts x 1 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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• 180 watts x 2 channel @ 4 ohm
• 300 watts x 2 channel @ 2 ohm
• Bridged: 600 watts x 1 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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DS18 Hydro NXL-N2

900W Peak Class D HYDRO Series 2-Channel Ultra-Compact Marine and Powersports Nano Amplifier

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DS18 Hydro NXL-N2

900W Peak Class D HYDRO Series 2-Channel Ultra-Compact Marine and Powersports Nano Amplifier

• 100 watts x 2 channel @ 4 ohm
• 150 watts x 2 channel @ 2 ohm
• Bridged: 300 watts x 1 channel @ 4 ohm
• Total Peak Power: 900 watts
• IP67 waterproof rating
• Class D 2 ohm Stable 2-Channel-Channel Amplifier

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• 100 watts x 2 channel @ 4 ohm
• 150 watts x 2 channel @ 2 ohm
• Bridged: 300 watts x 1 channel @ 4 ohm
• Total Peak Power: 900 watts
• IP67 waterproof rating
• Class D 2 ohm Stable 2-Channel-Channel Amplifier

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American Bass VFL Comp 350.4FR (VFLCOMP-350.4FR)

1000W RMS Class D VFL Comp Series 4-Channel Car Amplifier

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American Bass VFL Comp 350.4FR (VFLCOMP-350.4FR)

1000W RMS Class D VFL Comp Series 4-Channel Car Amplifier

• 175 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
• Class D 2 ohm Stable 4-Channel Amplifier

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NVX XKIT44

$119.99

$83.99

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Cerwin Vega SRPM700.2DW

700W RMS Class D Stroker RPM Series 2-Channel Marine Amplifier (White)

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Cerwin Vega SRPM700.2DW

700W RMS Class D Stroker RPM Series 2-Channel Marine Amplifier (White)

• 200 watts x 2 channel @ 4 ohm
• 350 watts x 2 channel @ 2 ohm
• Bridged: 700 watts x 1 channel @ 4 ohm
• Total RMS Power: 750 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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• 200 watts x 2 channel @ 4 ohm
• 350 watts x 2 channel @ 2 ohm
• Bridged: 700 watts x 1 channel @ 4 ohm
• Total RMS Power: 750 watts
• Class D 2 ohm Stable 2-Channel Amplifier

Diamond Audio HX400.2

700W RMS Class D HEX Series 2-Channel Full Range Car Amplifier

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Diamond Audio HX400.2

700W RMS Class D HEX Series 2-Channel Full Range Car Amplifier

• 200 watts x 2 channel @ 4 ohm
• 350 watts x 2 channel @ 2 ohm
• Bridged: 700 watts x 1 channel @ 4 ohm
• Total RMS Power: 700 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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Diamond Audio HX480.4

740W RMS Class D HEX Series 4-Channel Full Range Car Amplifier

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Diamond Audio HX480.4

740W RMS Class D HEX Series 4-Channel Full Range Car Amplifier

• 120 watts x 4 channel @ 4 ohm
• 185 watts x 4 channel @ 2 ohm
• Bridged: 370 watts x 2 channel @ 4 ohm
• Total RMS Power: 740 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Cerwin-Vega XED6004D

500W Peak (480W RMS) Class D XED Series 4 Channel Car Amplifier

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Cerwin-Vega XED6004D

500W Peak (480W RMS) Class D XED Series 4 Channel Car Amplifier

• 80 watts x 4 channel @ 4 ohm
• 120 watts x 4 channel @ 2 ohm
• Bridged: 220 watts x 2 channel @ 4 ohm
• Total RMS Power: 480 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Save 30% off an NVX XKIT44 Amp Kit at Checkout!
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NVX XKIT44

NVX XKIT44

$119.99

$83.99

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Crunch DR-1325.4D

1325W Peak Class D V-Drive Series 4-Channel Car Amplifier

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Crunch DR-1325.4D

1325W Peak Class D V-Drive Series 4-Channel Car Amplifier

• 165 watts x 4 channel @ 4 ohm
• 330 watts x 4 channel @ 2 ohm
• Bridged: 660 watts x 2 channel @ 4 ohm
• Total peak power output: 1325 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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MB Quart RA1-1100.4

1100W Peak Class D Reference Series 4 Channel Car Amplifier

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MB Quart RA1-1100.4

1100W Peak Class D Reference Series 4 Channel Car Amplifier

• 150 watts x 4 channel @ 4 ohm
• 275 watts x 4 channel @ 2 ohm
• Bridged: 550 watts x 2 channel @ 4 ohm
• Class D 2 ohm Stable 4-Channel Amplifier

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DS18 H-KO340/RD

2200W RMS Class D Hooligan Series 4-Channel Car Amplifier (Red)

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DS18 H-KO340/RD

2200W RMS Class D Hooligan Series 4-Channel Car Amplifier (Red)

• 300 watts x 4 channel @ 4 ohm
• 550 watts x 4 channel @ 2 ohm
• Bridged: 1000 watts x 2 channel @ 4 ohm
• Total RMS Power: 2200 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

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NVX XKIT04

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Cerwin-Vega H800.5D

800W RMS Class D HED Series 5 Channel Car Amplifier

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Cerwin-Vega H800.5D

800W RMS Class D HED Series 5 Channel Car Amplifier

• 85 watts x 4 channel + 180 watts x 1 channel @ 4 ohm
• 125 watts x 4 channel + 300 watts x 1 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel Amplifier

Save 30% off an NVX XKIT46 Amp Kit at Checkout!
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NVX XKIT46

$129.99

$90.99

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• 85 watts x 4 channel + 180 watts x 1 channel @ 4 ohm
• 125 watts x 4 channel + 300 watts x 1 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel Amplifier

American Bass VFL-2000.4

4000W RMS Class D VFL Series 4-Channel Car Amplifier

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American Bass VFL-2000.4

4000W RMS Class D VFL Series 4-Channel Car Amplifier

• 500 watts x 4 channel @ 4 ohm
• 800 watts x 4 channel @ 2 ohm
• 1000 watts x 4 channel @ 1 ohm
• Bridged: 1600 watts x 2 channel @ 4 ohm
• Total RMS Power: 4000 watts
• Class D 1 ohm Stable 4-Channel Amplifier

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• 500 watts x 4 channel @ 4 ohm
• 800 watts x 4 channel @ 2 ohm
• 1000 watts x 4 channel @ 1 ohm
• Bridged: 1600 watts x 2 channel @ 4 ohm
• Total RMS Power: 4000 watts
• Class D 1 ohm Stable 4-Channel Amplifier

Kenwood eXcelon X803-5 (Open Box, Great)

1600W Peak (800W RMS) Class D eXcelon Series 5 Channel Car Amplifier with Bass Remote

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Kenwood eXcelon X803-5 (Open Box, Great)

1600W Peak (800W RMS) Class D eXcelon Series 5 Channel Car Amplifier with Bass Remote

• 50 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 75 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel-Channel Amplifier

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• 50 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 75 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel-Channel Amplifier

MTX MA900.6

900W RMS Class D MA Series 6-Channel Marine Amplifier

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MTX MA900.6

900W RMS Class D MA Series 6-Channel Marine Amplifier

• 75 watts x 6 channel @ 4 ohm
• 150 watts x 6 channel @ 2 ohm
• Bridged: 300 watts x 3 channel @ 4 ohm
• Total RMS Power: 900 watts
• Class D 2 ohm Stable 6-Channel Amplifier

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• 75 watts x 6 channel @ 4 ohm
• 150 watts x 6 channel @ 2 ohm
• Bridged: 300 watts x 3 channel @ 4 ohm
• Total RMS Power: 900 watts
• Class D 2 ohm Stable 6-Channel Amplifier

Limited time!

Cerwin-Vega H440.4D

440W RMS Class D HED Series 4 Channel Car Amplifier

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Cerwin-Vega H440.4D

440W RMS Class D HED Series 4 Channel Car Amplifier

• 75 watts x 4 channel @ 4 ohm
• 110 watts x 4 channel @ 2 ohm
• Bridged: 220 watts x 2 channel @ 4 ohm
• Total RMS Power: 440 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Save 30% off an NVX XKIT44 Amp Kit at Checkout!
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NVX XKIT44

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• 75 watts x 4 channel @ 4 ohm
• 110 watts x 4 channel @ 2 ohm
• Bridged: 220 watts x 2 channel @ 4 ohm
• Total RMS Power: 440 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Limited time!

DS18 FX4

3000W Peak (1000W RMS) Class D FX Series 4-Channel Car Amplifier with LED

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DS18 FX4

3000W Peak (1000W RMS) Class D FX Series 4-Channel Car Amplifier with LED

• 180 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
• Class D 2 ohm Stable 4-Channel Amplifier

Save 30% off an NVX XKIT44 Amp Kit at Checkout!
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• 180 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
• Class D 2 ohm Stable 4-Channel Amplifier

NVX VAD8402 (Open Box, Good)

840W RMS VAD Series Class-D 2-Channel Full-Range Car/Marine/Powersports Amplifier

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NVX VAD8402 (Open Box, Good)

840W RMS VAD Series Class-D 2-Channel Full-Range Car/Marine/Powersports Amplifier

• RMS: 300 x 2 @ 4 ohm, 420W x 2 @ 2 ohm, Bridged 840W x 1 @ 4 ohm
• Total RMS Power: 840W
• CEA-2006 Compliant
• Efficient Full Range Class D Design
• Dimensions: 10.1"W x 5.4"D x 2.0H

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