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

2011 Audi A4

Change vehicle | Remove vehicle

Get an amplifier ranging from 1-channel monoblock for some added low-end bass to power a sub(s) all the way up to a 5-channel for a complete system overhaul.

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

Amplifier and Amp Accessories for 2011 Audi A4

Keep in mind that some vehicles require a line-output converter like the NVX XLCA2 or AudioControl LC2i 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.

Monoblock Sub Amplifiers

Monoblock Sub Amplifiers

If you want to add a sub to your 2011 A4, then you'll want a monoblock amp.

Multi-channel Amplifiers

Multi-channel Amplifiers for Adding Speakers

Multi-channel amps (2/3/4 and more) for when you upgrade speakers.

Amplifiers, Processors and Install Accessories

Shop all amps and sound processors

Shop our site's main category for all amps and processors available.

Amplifier Install Accessories and Kits

Amplifier install accessories

Shop our site's main category for amp installation accessories like amp wire kits.

Filters
Reset Done
Price Range
Product Fitment Type
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.
Punch Series (38)
Power Series (27)
Machete Series (22)
FRP Series (21)
XDM Series (21)
Prime Series (17)
V Series (16)
CVP Series (15)
Hydro Series (14)
SXE Series (13)
VXi Series (13)
Apocalypse Atom Pro Series (12)
RD Series (12)
Reference Series (11)
SALT Series (11)
SMD Series (11)
Brutus BRL Series (9)
CX Series (9)
Gen-X (9)
JD Series (9)
MVi Series (9)
Nautic Series (9)
SAE Series (9)
Brutus BG Series (8)
Elite Series (8)
Epic Series (8)
Godfather Series (8)
Ground Pounder Series (8)
HD Series (8)
Hooligan Series (8)
MA Series (8)
Stroker RPM Series (8)
V-Drive Series (8)
XED Series (8)
BX Series (7)
Club Series (7)
Competition Series (7)
CRA Series (7)
HEX Series (7)
iON Series (7)
KXM Series (7)
LX Series (7)
R-Series (7)
Thunder Series (7)
Apocalypse Sport Series (6)
eXcelon Series (6)
HED Series (6)
JA Series (6)
M2 Series (6)
MUD Series (6)
MX Series (6)
Power Pack Series (6)
SFB Series (6)
SIA Series (6)
VEGA Series (6)
Venezia Series (6)
ZR Series (6)
ACX Series (5)
Diamond Elite Series (5)
DMD Series (5)
Formula Series (5)
HCP Series (5)
KM Series (5)
Marine V Series (5)
Mean Machine Series (5)
Mini Series (5)
N-Series (5)
Premium Pro Series (5)
SAM Series (5)
Stealth Bomber Series (5)
Stroker Series (5)
SYN-DX Series (5)
Terminator Series (5)
XC-Series (5)
Altitude Series (4)
AP Series (4)
COLOSSUS Mini Series (4)
Discus Series (4)
DSP Series (4)
DXM Series (4)
Excelon Reference Series (4)
GM Series (4)
HTM Series (4)
M Series (4)
Marine Series (4)
Micro Series (4)
N Series (4)
PS Series (4)
PXA Series (4)
RS Series (4)
S Series (4)
Sinister Series (4)
Status Series (4)
Stroker Pro Series (4)
X Series (4)
XQ Series (4)
Apex Series (3)
COLOSSUS Series (3)
Compact Mean Machine Series (3)
D Series (3)
DRVN Series (3)
Excelon Motorsports Series (3)
HRPM Series (3)
HXM Series (3)
LC Series (3)
M5 Series (3)
MDX Series (3)
MHD Series (3)
MicroV2 Series (3)
NXL Series (3)
Rebel Series (3)
SPL Show Series (3)
Stage GT Series (3)
Stealth STX Series (3)
Trident Series (3)
VFL Comp Series (3)
VFL Stealth Series (3)
Zeus Series (3)
Alpha Series (2)
Apocalypse Series (2)
BB Series (2)
Buran Series (2)
DB Series (2)
Edge Series (2)
EV Series (2)
FX Series (2)
HCCA Series (2)
HMP Series (2)
Kappa Perfect Series (2)
Key Series (2)
KPX Series (2)
Micro8U Series (2)
MINI BANG Series (2)
MotorSport Series (2)
Picasso-Nano Series (2)
PowerHouse Shredder Series (2)
Primo Series (2)
Primus Series (2)
Q-Series (2)
QS Series (2)
RTX Series (2)
Signature Series (2)
Stealth Mini Series (2)
VFL Rebel Series (2)
VFL Series (2)
Warhorse Series (2)
XFL Series (2)
ACM Series (1)
Atom Series (1)
Bomber Series (1)
Colossus Classic Series (1)
CVPM Series (1)
CVPRO Series (1)
DC Series (1)
DPower Series (1)
EXL Series (1)
EXL-P Series (1)
GM Digital Series (1)
GT Series (1)
HMS Series (1)
HTX Series (1)
Mille Pro Series (1)
PowerZone 2 Series (1)
Punch BR Series (1)
PXE Series (1)
Reserve Series (1)
SAEv4 Series (1)
Smash Series (1)
SPL (1)
SPX Series (1)
Street Reference (1)
WET Series (1)
ZXI 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.
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!
Condition
Availability
filter-icon Filters & Sort

Alpine Status HDA-F60

600W RMS Class D Status Series 4 Channel High-Resolution Car Amplifier

HDA-F60 big
Go to item page Right Arrow Icon of Right Arrow

Alpine Status HDA-F60

600W RMS Class D Status Series 4 Channel High-Resolution Car Amplifier

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

2+ offers available
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $100.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
List price $1200.00
-17% $999.95

In stock

Only 1 Left!

Add to Cart
Continue to cart
Available Offers (2) for Alpine Status HDA-F60
FREE NVX Amp Kit at Checkout!
Add both to cart
Save 30% off an NVX XKIT44 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT44 Amp Kit! No code needed — discount applies automatically at checkout.
Select your other item

Deaf Bonce Apocalypse ATOM 1600.1 PRO (Open Box, Good)

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

ATOM 1600.1 PRO big
Go to item page Right Arrow Icon of Right Arrow

Deaf Bonce Apocalypse ATOM 1600.1 PRO (Open Box, Good)

1600W RMS Class D Apocalypse Atom Pro Series Monoblock Car 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

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

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $229.90
-40% $137.94

In stock

Only 1 Left!

Add to Cart

• 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

AudioControl A800.1

800W RMS Class D Altitude Series Monoblock Car Amplifier

A800.1 big
Go to item page Right Arrow Icon of Right Arrow

AudioControl A800.1

800W RMS Class D Altitude Series Monoblock Car Amplifier

• 400 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

2+ offers available
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $26.90 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
List price $349.00
-23% $269.00

In stock

Only 3 Left!

Add to Cart
Continue to cart
Available Offers (2) for AudioControl A800.1
FREE Belva Amp Kit at Checkout!
Add both to cart
Save 30% on an NVX XKIT42 Amp Kit with Purchase! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT42 Amp Kit! No code needed — discount applies automatically at checkout.
Select your other item
See all 8 special offers

Sundown Audio SFB-1000D (A-SFBV21000)

1000W RMS Class D SFB Series Monoblock Car Amplifier

A-SFBV21000 big
Go to item page Right Arrow Icon of Right Arrow

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

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

VIP Product Get $24.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
List price $287.99
-17% $239.99

In stock

Only 3 Left!

Add to Cart
See all 5 special offers

Kicker LX1200.5 (51LX12005)

1500W Peak (1200W RMS) Class D LX Series 5-Channel Full Range Car Amplifier (with Bass Remote and Control Center)

51LX12005 big
Go to item page Right Arrow Icon of Right Arrow

Kicker LX1200.5 (51LX12005)

1500W Peak (1200W RMS) Class D LX Series 5-Channel Full Range Car Amplifier (with Bass Remote and Control Center)

• 125 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 175 watts x 4 channel + 550 watts x 1 channel @ 2 ohm
• 700 watts x 1 channel @ 1 ohm
• Bridged: 350 watts x 2 channel @ 4 ohm + 550 watts x 1 channel @ 2 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable 5-Channel Amplifier

2+ offers available
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $85.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
List price $949.99
-11% $849.99

In stock

Add to Cart
Continue to cart
Available Offers (2) for Kicker LX1200.5 (51LX12005)
FREE Belva Amp Kit at Checkout!
Add both to cart
Save 30% off an NVX XKIT06 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT06 Amp Kit! No code needed — discount applies automatically at checkout.
Select your other item

Deaf Bonce Machete MLA-100.4

600W RMS Class D Machete Series 4-Channel Car Amplifier

MLA-100.4 big
Go to item page Right Arrow Icon of Right Arrow

Deaf Bonce Machete MLA-100.4

600W RMS Class D Machete Series 4-Channel Car Amplifier

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

2+ offers available
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $16.99 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

$169.90

In stock

Add to Cart
Continue to cart
Available Offers (2) for Deaf Bonce Machete MLA-100.4
FREE Belva Amp Kit at Checkout!
Add both to cart
Save 30% off an NVX XKIT44 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT44 Amp Kit! No code needed — discount applies automatically at checkout.
Select your other item
Limited time!

Stinger SPX1000X5

1100W RMS Class D 5-Channel Marine and Powersport Amplifier with Bluetooth and Bass Remote

SPX1000X5 big
Go to item page Right Arrow Icon of Right Arrow

Stinger SPX1000X5

1100W RMS Class D 5-Channel Marine and Powersport Amplifier with Bluetooth and Bass Remote

• 95 watts x 4 channel + 275 watts x 1 channel @ 4 ohm
• 150 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 1100 watts
• Class D 2 ohm Stable 5-Channel Amplifier

FREE NVX Amp Kit at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $47.90 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $759.00
-37% $479.00

Available

Ships in 10-14 days

Add to Cart
Limited time!

Sundown Audio SALT-6

6000W RMS Class D SALT Series Competition Monoblock Car Amplifier with Bass Remote (A-SALT6)

SALT-6 big
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio SALT-6

6000W RMS Class D SALT Series Competition Monoblock Car Amplifier with Bass Remote (A-SALT6)

• 1500 watts x 1 channel @ 4 ohm
• 3000 watts x 1 channel @ 2 ohm
• 6000 watts x 1 channel @ 1 ohm
• 12000 watts x 1 channel @ 2 ohm Bridged
• Total RMS Power: 6000 watts
• Class D 1 ohm Stable Monoblock Amplifier

Save 30% off an NVX XKIT02 Amp Kit at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $190.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $2279.99
-17% $1,899.99

In stock

Only 2 Left!

Add to Cart
Available Deal
SALT-6 main
Offer may end without notice
Continue Shopping Continue to checkout
Eligible items

Shop items below for 30% off up to $100 discount on Save 30% off an NVX Amp Kit!

NVX XKIT02

NVX XKIT02

$179.99

$125.99

$54 Savings!

Add to cart
See all 5 special offers

JL Audio VX1000/5i

1000W RMS Class D VXi Series 5 Channel Car Amplifier with Built-in DSP

VX1000/5i big
Go to item page Right Arrow Icon of Right Arrow

JL Audio VX1000/5i

1000W RMS Class D VXi Series 5 Channel Car Amplifier with Built-in DSP

• 75 watts x 4 channel + 400 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 600 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable 5-Channel Amplifier
• Includes integrated DSP

2+ offers available
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $165.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
$1,649.99

In stock

Only 3 Left!

Add to Cart
Continue to cart
Available Offers (2) for JL Audio VX1000/5i
FREE NVX Amp Kit at Checkout!
Add both to cart
Save 30% off an NVX XKIT46 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT46 Amp Kit! No code needed — discount applies automatically at checkout.
Select your other item
Limited time!

Wet Sounds SYN-DX4 (Open Box, Great)

800W Peak Class D SYN-DX Series 4 Channel Marine Amplifier

SYN-DX4 big
Go to item page Right Arrow Icon of Right Arrow

Wet Sounds SYN-DX4 (Open Box, Great)

800W Peak Class D SYN-DX Series 4 Channel Marine Amplifier

• @ 4 ohm
• @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power:
• Class D 2 ohm Stable 4-Channel Amplifier

10% Off Open Box!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $1199.99
-30% $839.99
$755.99 with coupon | Price details

In stock

Only 1 Left!

Add to Cart

• @ 4 ohm
• @ 2 ohm
• Bridged: @ 4 ohm
• Total RMS Power:
• Class D 2 ohm Stable 4-Channel Amplifier

Cerwin-Vega CVP1600.1D

1600W Peak (200W RMS) Class AB CVP Series Monoblock Car Amplifier with Bass Remote

CVP1600.1D big
Go to item page Right Arrow Icon of Right Arrow

Cerwin-Vega CVP1600.1D

1600W Peak (200W RMS) Class AB CVP Series Monoblock Car Amplifier with Bass Remote

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

2+ offers available
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $13.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

7
List price $155.99
-17% $129.99

In stock

Add to Cart
Continue to cart
Available Offers (2) for Cerwin-Vega CVP1600.1D
FREE Belva Amp Kit at Checkout!
Add both to cart
Save 30% off an NVX XKIT82 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT82 Amp Kit! No code needed — discount applies automatically at checkout.
Select your other item
See all 5 special offers
Limited time!

Kicker KXMA1500.1 (51KXMA15001)

2500W Peak (1500W RMS) Class D KXM Series Monoblock Marine Amplifier with Bass Remote

51KXMA15001 big
Go to item page Right Arrow Icon of Right Arrow

Kicker KXMA1500.1 (51KXMA15001)

2500W Peak (1500W RMS) Class D KXM Series Monoblock Marine Amplifier with Bass Remote

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

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

VIP Product Get $56.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $799.99
Save $240.03
-30% $559.96

In stock

Add to Cart

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

Limited time!

NVX XCA3K

3000W RMS Class D XC-Series Monoblock Korean Competition Amplifier with Bass Remote

XCA3K big
Go to item page Right Arrow Icon of Right Arrow

NVX XCA3K

3000W RMS Class D XC-Series Monoblock Korean Competition Amplifier with Bass Remote

• 1000 watts x 1 channel @ 4 ohm
• 2000 watts x 1 channel @ 2 ohm
• 3000 watts x 1 channel @ 1 ohm
• Total RMS Power: 3000 watts
• Class D 1 ohm Stable Monoblock Amplifier

Save 30% off an NVX XKIT02 Amp Kit at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $80.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

2
List price $1079.99
-26% $799.99

In stock

Add to Cart
Available Deal
XCA3K main
Offer may end without notice
Continue Shopping Continue to checkout
Eligible items

Shop items below for 30% off up to $100 discount on Save 30% off an NVX Amp Kit!

NVX XKIT02

NVX XKIT02

$179.99

$125.99

$54 Savings!

Add to cart
See all 5 special offers

Diamond Audio MICRO4V2

600W RMS Class D MicroV2 Series 4-Channel Compact Amplifier with Bluetooth

MICRO4V2 big
Go to item page Right Arrow Icon of Right Arrow

Diamond Audio MICRO4V2

600W RMS Class D MicroV2 Series 4-Channel Compact Amplifier with Bluetooth

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

2+ offers available
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $40.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
List price $499.99
-20% $399.99

In stock

Add to Cart
Continue to cart
Available Offers (2) for Diamond Audio MICRO4V2
FREE Belva Amp Kit at Checkout!
Add both to cart
Save 30% off an NVX XKIT84 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT84 Amp Kit! No code needed — discount applies automatically at checkout.
Select your other item
See all 4 special offers
Limited time!

Kicker KXMA800.4 (48KXMA8004)

1100W Peak (800W RMS) Class D KXM Series 4-Channel Marine Amplifier

KXMA800.4 big
Go to item page Right Arrow Icon of Right Arrow

Kicker KXMA800.4 (48KXMA8004)

1100W Peak (800W RMS) Class D KXM Series 4-Channel Marine Amplifier

• 100 watts x 4 channel @ 4 ohm
• 200 watts x 4 channel @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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

VIP Product Get $45.60 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $619.99
Save $164.03
-26% $455.96

In stock

Only 3 Left!

Add to Cart

Sundown Audio SAEv.4-1500.1D

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

SAEv.4-1500.1D big
Go to item page Right Arrow Icon of Right Arrow

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

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

VIP Product Get $43.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $515.99
-17% $429.99

In stock

Add to Cart
See all 5 special offers
Limited time!

Hifonics ZD-750.4D Zeus Delta

750W Peak Class D Zeus Delta Series 4 Channel Car Amplifier

ZD-750.4D big
Go to item page Right Arrow Icon of Right Arrow

Hifonics ZD-750.4D Zeus Delta

750W Peak Class D Zeus Delta Series 4 Channel Car Amplifier

• 100 watts x 4 channel @ 4 ohm
• 175 watts x 4 channel @ 2 ohm
• Bridged: 375 watts x 2 channel @ 4 ohm
• Class D 2 ohm Stable 4-Channel Amplifier

Save 30% off an NVX XKIT44 Amp Kit 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

1
List price $149.99
-16% $125.99

In stock

Add to Cart
Available Deal
ZD-750.4D main
Offer may end without notice
Continue Shopping Continue to checkout
Eligible items

Shop items below for 30% off up to $100 discount on Save 30% off an NVX Amp Kit!

NVX XKIT44

NVX XKIT44

$119.99

$83.99

$36 Savings!

Add to cart

• 100 watts x 4 channel @ 4 ohm
• 175 watts x 4 channel @ 2 ohm
• Bridged: 375 watts x 2 channel @ 4 ohm
• Class D 2 ohm Stable 4-Channel Amplifier

Limited time!

NVX VADM5 v2 (VADM5v2)

1500W Peak (750W RMS) Class D V-Series 5-Channel Car/Marine/Powersports Amplifier with Bass Remote

VADM5v2 big
Go to item page Right Arrow Icon of Right Arrow

NVX VADM5 v2 (VADM5v2)

1500W Peak (750W RMS) Class D V-Series 5-Channel Car/Marine/Powersports Amplifier with Bass Remote

• 65 watts x 4 channel + 230 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 350 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 350 watts x 1 channel @ 2 ohm
• Total RMS Power: 750 watts
• Class D 2 ohm Stable 5-Channel Amplifier

Save 30% off an NVX XKIT86 Amp Kit at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $25.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
List price $347.99
-28% $249.99

In stock.

Add to Cart
Available Deal
VADM5v2 main
Offer may end without notice
Continue Shopping Continue to checkout
Eligible items

Shop items below for 30% off up to $100 discount on Save 30% off an NVX Amp Kit!

NVX XKIT86

NVX XKIT86

$84.99

$59.49

$25.50 Savings!

Add to cart

Kenwood eXcelon X303-4

600W Peak (300W RMS) Class D eXcelon Series 4 Channel Car Amplifier

X303-4 big
Go to item page Right Arrow Icon of Right Arrow

Kenwood eXcelon X303-4

600W Peak (300W RMS) Class D eXcelon Series 4 Channel Car Amplifier

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

2+ offers available
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $30.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
List price $400.00
-25% $299.99

In stock

Add to Cart
Continue to cart
Available Offers (2) for Kenwood eXcelon X303-4
FREE Belva Amp Kit at Checkout!
Add both to cart
Save 30% off an NVX XKIT44 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT44 Amp Kit! No code needed — discount applies automatically at checkout.
Select your other item
Like New from: $254.99

Kicker LX500.4 (51LX5004)

1100W Peak (900W RMS) Class D LX Series 4-Channel Full Range Car Amplifier (with Control Center)

51LX5004 big
Go to item page Right Arrow Icon of Right Arrow

Kicker LX500.4 (51LX5004)

1100W Peak (900W RMS) Class D LX Series 4-Channel Full Range Car Amplifier (with Control Center)

• 125 watts x 4 channel @ 4 ohm
• 225 watts x 4 channel @ 2 ohm
• Bridged: 450 watts x 2 channel @ 4 ohm
• Total RMS Power: 900 watts
• Class D 2 ohm Stable 4-Channel Amplifier

2+ offers available
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $60.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $649.99
-8% $599.99

In stock

Add to Cart
Continue to cart
Available Offers (2) for Kicker LX500.4 (51LX5004)
FREE NVX Amp Kit at Checkout!
Add both to cart
Save 30% off an NVX XKIT44 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT44 Amp Kit! No code needed — discount applies automatically at checkout.
Select your other item
Prev 7 8 9 10 11 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 Aftermarket amplifiers and amp accessories in 2011 A4

    Q: Can I upgrade or change the Aftermarket amplifiers and amp accessories in 2011 Audi A4?

    A: Yes this page includes all the best Aftermarket amplifiers and amp accessories that work in your A4.

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

    2010 Dodge Ram 4500

    1979 Porsche 928

    2011 Audi A4

    1994 Lexus SC300

    2004 Aston Martin DB7

    1995 GMC K2500

    2023 Audi A5 Quattro

    2025 Chevrolet Blazer EV

    1969 GMC C1500 Pickup

    1999 Dodge Ram 1500 Van

    Vehicle
    Store     Delete

    1952 Harley Davidson FL

    2000 Harley Davidson XLH883

    Vehicle
    Store     Delete

    2012 Can-Am Commander 1000 X

    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 2011 A4
    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.

    Additional information:

    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