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2012 Audi A4

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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 2012 Audi A4

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.
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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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JL Audio VX1000/1i (Open Box, Great)

1000W RMS Class D VXi Series Monoblock Car Amplifier with Built-in DSP

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JL Audio VX1000/1i (Open Box, Great)

1000W RMS Class D VXi Series Monoblock Car Amplifier with Built-in DSP

• 600 watts x 1 channel @ 4 ohm
• 1000 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes integrated DSP

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• 600 watts x 1 channel @ 4 ohm
• 1000 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes integrated DSP

JL Audio JD1000/1 (Open Box, Great)

1000W RMS Class D JD Series Monoblock Car Amplifier

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JL Audio JD1000/1 (Open Box, Great)

1000W RMS Class D JD Series Monoblock Car Amplifier

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

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Kicker LX1650.1 (51LX16501)

2200W Peak (1650W RMS) Class D LX Series Monoblock Car Amplifier (with RGB LED-Lit Bass Remote)

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Kicker LX1650.1 (51LX16501)

2200W Peak (1650W RMS) Class D LX Series Monoblock Car Amplifier (with RGB LED-Lit Bass Remote)

• 550 watts x 1 channel @ 4 ohm
• 1000 watts x 1 channel @ 2 ohm
• 1650 watts x 1 channel @ 1 ohm
• Total RMS Power: 1650 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Rockford Fosgate Power T750X1bd

750W RMS Class BD Power Series Monoblock Car Amplifier

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Rockford Fosgate Power T750X1bd

750W RMS Class BD Power Series Monoblock Car Amplifier

• 500 watts x 1 channel @ 4 ohm
• 750 watts x 1 channel @ 2 ohm
• 750 watts x 1 channel @ 1 ohm
• Total RMS Power: 750 watts
• Class BD 1 ohm Stable Monoblock Amplifier

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Sundown Audio SFB-1000D (A-SFBV21000)

1000W RMS Class D SFB Series Monoblock Car Amplifier

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Sundown Audio SFB-1000D (A-SFBV21000)

1000W RMS Class D SFB Series Monoblock Car Amplifier

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

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Sundown Audio SIA-1250D (A-SIA1250)

1250W RMS Class D SIA Series Monoblock Car Amplifier

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Sundown Audio SIA-1250D (A-SIA1250)

1250W RMS Class D SIA Series Monoblock Car Amplifier

• 800 watts x 1 channel @ 4 ohm
• 1250 watts x 1 channel @ 2 ohm
• 1250 watts x 1 channel @ 1 ohm
• Total RMS Power: 1250 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Kicker KMA800.1 (48KMA8001)

1200W Peak (800W RMS) Class D KM Series Monoblock Marine Amplifier with Bass Remote

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Kicker KMA800.1 (48KMA8001)

1200W Peak (800W RMS) Class D KM Series Monoblock Marine 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

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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

JL Audio XDM300/1

300W RMS Class D XDM Series Monoblock Car and Marine Amplifier

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JL Audio XDM300/1

300W RMS Class D XDM Series Monoblock Car and Marine Amplifier

• 200 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

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Sundown Audio SAEv.4-1500.1D

1500W RMS Class D SAE Series Monoblock Car Amplifier with Wired Remote Control (SAEv.4-1500D)

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Sundown Audio SAEv.4-1500.1D

1500W RMS Class D SAE Series Monoblock Car Amplifier with Wired Remote Control (SAEv.4-1500D)

• 450 watts x 1 channel @ 4 ohm
• 800 watts x 1 channel @ 2 ohm
• 1500 watts x 1 channel @ 1 ohm
• Total RMS Power: 1500 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Deaf Bonce Apocalypse ATOM 7.5K PRO

7500W RMS Class D Apocalypse Atom Pro Series Monoblock Car Amplifier with Bass Remote

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Deaf Bonce Apocalypse ATOM 7.5K PRO

7500W RMS Class D Apocalypse Atom Pro Series Monoblock Car Amplifier with Bass Remote

• 2500 watts x 1 channel @ 4 ohm
• 4150 watts x 1 channel @ 2 ohm
• Total RMS Power: 7500 watts
• Class D 1 ohm Stable Monoblock Amplifier

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NVX XKIT02

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Rockford Fosgate Power T500-1bdCP

500W RMS Class BD Power Series Monoblock Car Amplifier

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Rockford Fosgate Power T500-1bdCP

500W RMS Class BD Power Series Monoblock Car Amplifier

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

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AudioControl EPIC500

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

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AudioControl EPIC500

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

• 250 watts x 1 channel @ 4 ohm
• 350 watts x 1 channel @ 2 ohm
• 500 watts x 1 channel @ 1 ohm
• 1000 watts x 1 channel (strapped) @ 2 ohm bridged
• Total RMS Power: 500 watts
• Class D 1 ohm Stable Monoblock Amplifier

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JL Audio VX1000/1i

1000W RMS Class D VXi Series Monoblock Car Amplifier with Built-in DSP

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JL Audio VX1000/1i

1000W RMS Class D VXi Series Monoblock Car Amplifier with Built-in DSP

• 600 watts x 1 channel @ 4 ohm
• 1000 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes integrated DSP

Save 30% off an NVX XKIT02 Amp Kit at Checkout!
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NVX XKIT02

NVX XKIT02

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Deaf Bonce Apocalypse ATOM 5.5K PRO

5500W RMS Class D Apocalypse Atom Pro Series Monoblock Car Amplifier with Bass Remote

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Deaf Bonce Apocalypse ATOM 5.5K PRO

5500W RMS Class D Apocalypse Atom Pro Series Monoblock Car Amplifier with Bass Remote

• 1710 watts x 1 channel @ 4 ohm
• 2850 watts x 1 channel @ 2 ohm
• 5500 watts x 1 channel @ 1 ohm
• Total RMS Power: 5500 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Hifonics HCC-3000.1D Colossus Classic

3000W Peak Class D Colossus Classic Series Monoblock Amplifier with Bass Remote

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Hifonics HCC-3000.1D Colossus Classic

3000W Peak Class D Colossus Classic Series Monoblock Amplifier with Bass Remote

• 750 watts x 1 channel @ 4 ohm
• 1500 watts x 1 channel @ 2 ohm
• 3000 watts x 1 channel @ 1 ohm
• Total Power: 3000 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Rockford Fosgate Punch P300X1

300W RMS Class AB Punch Series Monoblock Car Amplifier

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Rockford Fosgate Punch P300X1

300W RMS Class AB Punch Series Monoblock Car Amplifier

• 200 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class A/B 2 ohm Stable Monoblock Amplifier

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Alpine R2-A75M

750W RMS Class D R-Series Monoblock Car Amplifier

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Alpine R2-A75M

750W RMS Class D R-Series Monoblock Car Amplifier

• 500 watts x 1 channel @ 4 ohm
• 750 watts x 1 channel @ 2 ohm
• Total RMS Power: 750 watts
• Class D 2 ohm Stable Monoblock Amplifier

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Hifonics Brutus BRL6000.1

6000W RMS Class D Brutus BRL Series Monoblock Car Amplifier with Bass Remote

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Hifonics Brutus BRL6000.1

6000W RMS Class D Brutus BRL Series Monoblock Car Amplifier with Bass Remote

• 2400 watts x 1 channel @ 4 ohm
• 4200 watts x 1 channel @ 2 ohm
• 6000 watts x 1 channel @ 1 ohm
• Total RMS Power: 6000 watts
• Class D 1 ohm Stable Monoblock Amplifier

Save 30% off an NVX XKIT02 Amp Kit at Checkout!
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Kicker PXA600.1 (48PXA6001) (Open Box, Great)

850W Peak (600W RMS) Class D PXA Series Monoblock Marine and Powersports Amplifier

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Kicker PXA600.1 (48PXA6001) (Open Box, Great)

850W Peak (600W RMS) Class D PXA Series Monoblock Marine and Powersports Amplifier

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

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

PowerBass Xtreme XTA-4000D (Open Box, Great)

4000W RMS XTA Series Class D Monoblock Amplifier

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PowerBass Xtreme XTA-4000D (Open Box, Great)

4000W RMS XTA Series Class D Monoblock Amplifier

XTA Series Monoblock Class D Car Amplifier • 4000W RMS • Dual Link Strapping Capability • Heavy-Duty Brass CNC Machined Terminal Blocks • Variable Bass Boost • Wired Remote Level Control • 4-Way System Protection Circuitry

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XTA Series Monoblock Class D Car Amplifier • 4000W RMS • Dual Link Strapping Capability • Heavy-Duty Brass CNC Machined Terminal Blocks • Variable Bass Boost • Wired Remote Level Control • 4-Way System Protection Circuitry

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    FAQ for Monoblock Sub Amplifiers in 2012 A4

    Q: Can I upgrade or change the Monoblock Sub Amplifiers in 2012 Audi A4?

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