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

2003 Audi A6

Change vehicle | Remove vehicle

Universal gear includes car amplifiers, subs, and other products that do not install in a specific location or require fitment to integrate with a vehicle.

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

Universal-Fit Audio for 2003 Audi A6

When thinking of universal gear, we consider products like a car amp that gives more power to your speakers or subs, cell phone chargers, equalizers and sound processors, rear-seat entertainment and video monitors, as well as dash cameras.

Better sound with your factory radio

Better sound with a factory radio

Love your factory look or can't replace the stereo? We got you covered.

Filters
Subwoofers ✕
Clear Filters
Reset Done
Product Type
Subwoofers,
You Recently Chose:
Amplifiers (936)
Line-out converters (90)
Subwoofers (1,132)
Subwoofers with a box (778)
Amplifiers with a wiring kit (436)
RCA cables and accessories (264)
Subwoofer enclosures (212)
Subwoofers with an amplifier and box (192)
Lighting accessories (176)
Subwoofer grilles (162)
Tweeters (Pro and special-fit) (151)
Amplifier wiring kits (143)
Speaker clamps and brackets (138)
Power and ground wire (130)
Batteries (129)
Fuses (123)
Backup cameras (119)
Speaker grilles (118)
Sound damping (107)
Subwoofers with an amplifier (101)
Alarm remote transmitters (96)
Handlebar and bar-mount speakers (94)
Fuse holders (80)
Speaker wire (73)
Replacement antennas (62)
Ring terminals (62)
Distribution blocks (58)
Light bars (58)
Connectors (55)
Bluetooth adapters and transmitters (52)
Speaker enclosures (51)
Speaker spacers and rings (50)
Bass remotes (49)
Cables and interconnects (48)
Dash cameras (39)
Trim rings and universal mounts (38)
Sound processors (37)
Alarms (34)
Stereo remote controls (33)
Recone kits (31)
Rocker and Button switches (31)
Circuit breakers (30)
Primary/Remote wire (29)
Battery isolators and relays (27)
Battery terminals (27)
Exterior lighting (26)
Audio test equipment (25)
Installation accessories (25)
Trigger output and bypass modules (24)
Alarm accessories (23)
Antenna extension cables (23)
Capacitors (22)
Split loom and heat shrink (22)
Tweeters (22)
Diodes and resistors (20)
Speaker baffles (19)
Knockout panels (18)
Equalizers (16)
Noise filters (14)
Terminal cups (14)
Battery terminal posts (13)
Rearview monitor and mirrors (13)
Adapters (12)
Headlight bulbs (12)
Radar and laser detectors (11)
Video adapters and switchers (11)
Speaker diaphragms (10)
Bass booster enhancers and processors (8)
Battery chargers (8)
Power inverters (8)
2-way and CB radios (7)
Amplifier mounting hardware (7)
Carpet (7)
Panel and clip removal tools (7)
Voltmeters (7)
Blindspot cameras and sensors (6)
Gauge adapters (6)
Grommets and firewall bushings (6)
Headlights (6)
Passive crossovers (6)
Sensors (6)
Box ports (5)
Knockout panel mount hardware (5)
Line drivers (5)
Power supplies (5)
Steering wheel adapters (5)
Active Crossovers (4)
Bass Blockers (4)
Big 3 upgrade kits (4)
License plates and frames (4)
Parking sensors (4)
Amplifier cooling fans (3)
Door panel clips (3)
In-motion video/navigation bypass (3)
Subwoofer (3)
Door actuators and poppers (2)
Radar detector mounts (2)
Rearview mirror mounts (2)
Video amplifiers (2)
Alarms with remote start (1)
Backup batteries (1)
Cable management (1)
Connector sets (1)
FM modulators and transmitters (1)
Multi-camera and DVR systems (1)
Overhead monitors (1)
Remote mount media players (1)
Price Range
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
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)
W3 v3 Series (25)
Power Series (22)
VC Series (21)
CompC Series (20)
CompRT Series (20)
SoloX Series (20)
Y-Series (20)
Apocalypse Series (19)
S Series (18)
Z Series (18)
CompR Series (17)
VEGA Series (17)
VMAX Series (17)
E-Series (16)
SA Series (16)
HED Series (15)
X Series (15)
NEO Series (14)
CompVX Series (13)
35 Series (12)
CompQ Series (12)
CompVR Series (12)
Level 5 Series (12)
Machete Series (12)
R2 Series (12)
U Series (12)
W7 Anniversary Edition Series (12)
N-Series (11)
Prime Series (11)
Solo-Baric L7S Series (11)
Solo-Baric L7T Series (11)
Punch P3 Series (10)
EXL Series (9)
HD Series (9)
M Series (9)
Power T1 Series (9)
Prime R2 Series (9)
Reference Series (9)
TW3 Shallow Mount Series (9)
ZR Series (9)
55 Series (8)
CompVT Series (8)
Diamond Elite Series (8)
IXS Shallow Series (8)
Level 4 Series (8)
Mille Pro Series (8)
Nightshade (NS) Series (8)
SA Classic Series (8)
SML Series (8)
Solo-Baric L7R Series (8)
W1 v3 Series (8)
XL Series (8)
ZXI Series (8)
A Series (7)
Comp Series (7)
Hifonics Elite Series (7)
Hippo Series (7)
Hooligan Series (7)
Level 3 Series (7)
Level 6 Series (7)
SRW Series (7)
VS Series (7)
W0 v3 Series (7)
EPICX Series (6)
Godfather Series (6)
HCCA Series (6)
HEX Series (6)
R Series (6)
Spike Series (6)
TW1 Series (6)
VFL Comp Series (6)
W6 v3 Series (6)
Cento Series (5)
D Series (5)
eXcelon Series (5)
SoloXS L7XS Series (5)
Stage Series (5)
Terminator Series (5)
XR Series (5)
75 Series (4)
CVP Series (4)
DMD Series (4)
DMD-SH Series (4)
EXL-X Series (4)
Godzilla Series (4)
GTR Series (4)
Hawk Series (4)
HED Slim Series (4)
Kappa Series (4)
King Series (4)
L Series (4)
N Series (4)
Punch P3 Shallow Mount Series (4)
RS Series (4)
Select Series (4)
Space Series (4)
Status Series (4)
Stroker Series (4)
SWT Series (4)
T1 Slim Series (4)
Tremor-X Series (4)
TW5 Shallow Mount Series (4)
Type-R Series (4)
Atom Series (3)
Club Series (3)
DB+ Series (3)
Discus Series (3)
EQ Series (3)
Gen-XX (3)
GTX Series (3)
LCS Series (3)
Level 1 Series (3)
Level 2 Series (3)
PRO-X Series (3)
Solo-Baric L7 Series (3)
Summo Series (3)
SWS Series (3)
TITAN Series (3)
Titanium Series (3)
TNT Series (3)
VFL Series (3)
XED Series (3)
Arena Series (2)
Bass Series (2)
BassLine Series (2)
C6 Series (2)
Champion Series (2)
Dieci Series (2)
DX Series (2)
Earthquake DBXI Series (2)
Elite Series (2)
ES Series (2)
Excelon Reference Series (2)
Gen-X (2)
GTS Series (2)
Hannibal Series (2)
HEX PRO Series (2)
HoleeS Series (2)
Magma Series (2)
Mille Legend Series (2)
Polk Audio MM1 Series (2)
Power T2 Series (2)
Power T3 Series (2)
Punch P1 Series (2)
SL Series (2)
SPL Show Series (2)
SQ Series (2)
Stadium Series (2)
Street Reference (2)
Stroker Pro Series (2)
Subzero Series (2)
W7 Series (2)
XFL Series (2)
XMAXX Series (2)
XMAXXX Monster Series (2)
XS-Series (2)
Arena X Series (1)
BOA-N Series (1)
CRW Series (1)
Diamond Shallow Series (1)
GT Series (1)
GTX Series (1)
HF Series (1)
JackHammer Series (1)
M2 Series (1)
M4 Series (1)
M6 Series (1)
MOJO Pro Series (1)
Performance Series (1)
Primus Series (1)
Punch P2 Series (1)
S65 Series (1)
SPL Monster Series (1)
Tarantula T5 Series (1)
TKO Series (1)
UFO Series (1)
W0 v2 Series (1)
XD Series (1)
XO Series (1)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.
Top-Mount Depth (Mounting Depth)
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Minimum Sealed Box Volume
This value indicates the minimum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
Maximum Sealed Box Volume
This value indicates the maximum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
  Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
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

DC Audio NEO 18 D2 (NEO18D2)

4400W Peak (2200W RMS) 18" NEO Series Dual 2-ohm Tight Gapped Car Subwoofer

NEO 18 D2 big
Go to item page Right Arrow Icon of Right Arrow

DC Audio NEO 18 D2 (NEO18D2)

4400W Peak (2200W RMS) 18" NEO Series Dual 2-ohm Tight Gapped Car Subwoofer

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Paper cone
• Multi-layered Polymer Foam surround
• Mount depth: 11"

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

VIP Product Get $122.50 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $1275.00
$1,225.00

Available

Ships in 10-14 days

Add to Cart

Polk Audio DB 1042 DVC (DB1042DVC)

1050W Peak (350W RMS) 10" DB+ Series Single 4-ohm Car, UTV and Marine Subwoofer

DB 1042 DVC big
Go to item page Right Arrow Icon of Right Arrow

Polk Audio DB 1042 DVC (DB1042DVC)

1050W Peak (350W RMS) 10" DB+ Series Single 4-ohm Car, UTV and Marine Subwoofer

• Peak Power: 1050 watts
• RMS Power: 350 watts
• Impedance: Dual 4 ohm
• Polypropylene cone
• Santoprene Rubber surround
• Mount depth: 4.34"
• Sensitivity: 85 dB

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

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

12
List price $119.99
-8% $110.00

Available

Ships in 10-14 days

Add to Cart
NVX - Worth the Envy - Direct to Consumer Car Audio

Sundown Audio M-18 D2 18" (M18D2)

4000W Peak (2000W RMS) 18" M Series Dual 2-ohm Car Subwoofer (SW-MD18D2)

SW-MD18D2 big
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio M-18 D2 18" (M18D2)

4000W Peak (2000W RMS) 18" M Series Dual 2-ohm Car Subwoofer (SW-MD18D2)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• High Roll Foam Surround
• Mount depth: 14.05"
• Sensitivity: 86.102 dB

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

VIP Product Get $70.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $719.99
$699.99

Available

Ships in 10-14 days

Add to Cart

DS18 EXL-TR15.4D

5000W Peak (2500W RMS) 15" EXL Series Dual 4-ohm Car Subwoofer

EXL-TR15.4D big
Go to item page Right Arrow Icon of Right Arrow

DS18 EXL-TR15.4D

5000W Peak (2500W RMS) 15" EXL Series Dual 4-ohm Car Subwoofer

• Peak Power: 5000 watts
• RMS Power: 2500 watts
• Impedance: Dual 4 ohm
• Non-Pressed Paper with Epoxy Coating cone
• Foam surround
• Mount depth: 9.2"
• Sensitivity: 84 dB

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

VIP Product Get $54.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $647.99
-17% $539.95

In stock.

Add to Cart

American Bass XO-1044v2

600W Peak (300W RMS) 10" XO Series Dual 4-ohm Car Subwoofer

XO-1044v2 big
Go to item page Right Arrow Icon of Right Arrow

American Bass XO-1044v2

600W Peak (300W RMS) 10" XO Series Dual 4-ohm Car Subwoofer

• Peak Power: 600 watts
• RMS Power: 300 watts
• Impedance: Dual 4 ohm
• Non-Pressed Paper Cone
• Over-sized 1.4" 3-layer Foam Surround
• Mount depth: 5.1"
• Sensitivity: 86.4 dB

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 $139.91
-41% $81.85

In stock.

Add to Cart

• Peak Power: 600 watts
• RMS Power: 300 watts
• Impedance: Dual 4 ohm
• Non-Pressed Paper Cone
• Over-sized 1.4" 3-layer Foam Surround
• Mount depth: 5.1"
• Sensitivity: 86.4 dB

JBL Stadium 122SSI (JBLSUBSD122SSIAM)

1500W Peak (500W RMS) 12" Stadium Series Single 2-or 4-ohm Car Subwoofer

Stadium 122SSI big
Go to item page Right Arrow Icon of Right Arrow

JBL Stadium 122SSI (JBLSUBSD122SSIAM)

1500W Peak (500W RMS) 12" Stadium Series Single 2-or 4-ohm Car Subwoofer

• Peak Power: 1500 watts
• RMS Power: 500 watts
• Impedance: Single 2 or 4 ohm
• Glass Fiber and Pulp/Kevlar Cone
• Nitrile Butadiene Rubber NBR Surround
• Mount depth: 7"
• Sensitivity: 92 dB

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

6
List price $349.95
-14% $299.95

In stock

Add to Cart
Used from: $254.96

Pioneer TS-A301D4

1600W Peak (500W RMS) 12" Champion Series Dual 4-ohm Car Subwoofer

TS-A301D4 big
Go to item page Right Arrow Icon of Right Arrow

Pioneer TS-A301D4

1600W Peak (500W RMS) 12" Champion Series Dual 4-ohm Car Subwoofer

• Peak Power: 1600 watts
• RMS Power: 500 watts
• Impedance: Dual 4 ohm
• Injection Molded Polypropylene Composite Cone
• Elastic Polymer Surround
• Mount depth: 6.125"
• Sensitivity: 92 dB

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

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

2
List price $165.00
-15% $140.00

In stock

Only 3 Left!

Add to Cart

Cerwin-Vega V12DV2

3600W Peak (1200W RMS) 12" Vega Series Dual 2-ohm Subwoofer

V12DV2 big
Go to item page Right Arrow Icon of Right Arrow

Cerwin-Vega V12DV2

3600W Peak (1200W RMS) 12" Vega Series Dual 2-ohm Subwoofer

• Peak Power: 3600 watts
• RMS Power: 1200 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Polypropylene Cone
• Santoprene Rubber Surround
• Mount depth: 6.57"
• Sensitivity: 87 dB

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

6
List price $359.99
-17% $299.99

In stock.

Add to Cart

DC Audio NEO 18 D1.4 (NEO18D1.4)

4400W Peak (2200W RMS) 18" NEO Series Dual 1.4-ohm Tight Gapped Car Subwoofer

NEO 18 D1.4 big
Go to item page Right Arrow Icon of Right Arrow

DC Audio NEO 18 D1.4 (NEO18D1.4)

4400W Peak (2200W RMS) 18" NEO Series Dual 1.4-ohm Tight Gapped Car Subwoofer

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 1.4 ohm
• Paper cone
• Multi-layered Polymer Foam surround
• Mount depth: 11"

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

VIP Product Get $122.50 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $1275.00
$1,224.99

Available

Ships in 10-14 days

Add to Cart

JL Audio 12W7-3

12" Single 3 ohm W7 Series Car Subwoofer

12W7 big
Go to item page Right Arrow Icon of Right Arrow

JL Audio 12W7-3

12" Single 3 ohm W7 Series Car Subwoofer

• Overroll Surround
• W-Cone
• Forced-Air-Cooled Aluminum Alloy Frame
• Radially Cross-Drilled Pole Piece
• Dual Ultra-Long Voice Coils
• Black Powder-Coating

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

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

66
$1,449.99

In stock

Only 3 Left!

Add to Cart

• Overroll Surround
• W-Cone
• Forced-Air-Cooled Aluminum Alloy Frame
• Radially Cross-Drilled Pole Piece
• Dual Ultra-Long Voice Coils
• Black Powder-Coating

Memphis MJP1244

1500W Peak (750W RMS) 12" MOJO Pro Series Dual 4-ohm Car Subwoofer

MJP1244 big
Go to item page Right Arrow Icon of Right Arrow

Memphis MJP1244

1500W Peak (750W RMS) 12" MOJO Pro Series Dual 4-ohm Car Subwoofer

• Peak Power: 1500 watts
• RMS Power: 750 watts
• Paper Cone
• Double-Stitched Surround
• Impedance: Dual 4 ohm
• Mount depth: 6.23"
• Sensitivity: 85.68 dB

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

VIP Product Get $26.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $339.95
-24% $259.95

In stock.

Add to Cart

DC Audio XL18 M4 D2 (M4XL18D2)

4400W Peak (2200W RMS) 18" XL Series M4 Version Dual 2-Ohm Car Subwoofer

M4XL18D2 big
Go to item page Right Arrow Icon of Right Arrow

DC Audio XL18 M4 D2 (M4XL18D2)

4400W Peak (2200W RMS) 18" XL Series M4 Version Dual 2-Ohm Car Subwoofer

• Peak Power: 4400 watts
• RMS Power: 2200 watts
• Impedance: Dual 1 ohm
• Non-Pressed Paper cone
• Multi-layered Polymer Foam surround
• Mount depth: 11.25"
• Sensitivity: 91.3 dB

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

VIP Product Get $77.50 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

2
List price $845.99
-8% $775.00

Available

Ships in 10-14 days

Add to Cart

DS18 ZXI15.2D

2000W Peak (1000W RMS) 15" ZXI Series Dual 4-ohm High Excursion Subwoofer

ZXI15.2D big
Go to item page Right Arrow Icon of Right Arrow

DS18 ZXI15.2D

2000W Peak (1000W RMS) 15" ZXI Series Dual 4-ohm High Excursion Subwoofer

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 2 ohm
• Non-Pressed Paper Cone
• Foam Surround
• Mount depth: 8.72"
• Sensitivity: 89 dB

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

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

$299.95

In stock.

Add to Cart

JBL Stage 122D (JBLSUBST122DAM)

1000W Peak (250W RMS) 12" Stage Series Dual 4-ohm Car Subwoofer

Stage 122D big
Go to item page Right Arrow Icon of Right Arrow

JBL Stage 122D (JBLSUBST122DAM)

1000W Peak (250W RMS) 12" Stage Series Dual 4-ohm Car Subwoofer

• Peak Power: 1000 watts
• RMS Power: 250 watts
• Impedance: Dual 4 ohm
• Polypropylene Subwoofer Cone material
• Rubber Subwoofer Surround material
• Mount depth: 6"
• Sensitivity: 91 dB

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

VIP Product Get $11.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $129.95
-15% $109.95

In stock

Add to Cart

DC Audio Level 6 18M5D1 (M5LV618D1)

8000W Peak (4500W RMS) 18" Level 6 Series M5 Version Dual 1-ohm Car Subwoofer

m5lv618d1 big
Go to item page Right Arrow Icon of Right Arrow

DC Audio Level 6 18M5D1 (M5LV618D1)

8000W Peak (4500W RMS) 18" Level 6 Series M5 Version Dual 1-ohm Car Subwoofer

• Peak Power: 8000 watts
• RMS Power: 4500 watts
• Impedance: Dual 1 ohm
• Kraft Pulp Cone
• Wide Foam Surround
• Mount depth: 13"
• Sensitivity: 88.7 dB

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

VIP Product Get $134.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

3
List price $1814.99
-26% $1,339.99

Available

Ships in 10-14 days

Add to Cart

American Bass XMAXXX Monster 15" (XMAXXX-1522)

8000W Peak (4000W RMS) 15" XMAX Series Dual 2-ohm Car Subwoofer

XMAXXX-1522 big
Go to item page Right Arrow Icon of Right Arrow

American Bass XMAXXX Monster 15" (XMAXXX-1522)

8000W Peak (4000W RMS) 15" XMAX Series Dual 2-ohm Car Subwoofer

• Peak Power: 6000 watts
• RMS Power: 3000 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Reinforced Non-Pressed Paper cone
• Foam surround
• Mount depth: 10.8"
• Sensitivity: 87.5 dB

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

VIP Product Get $88.07 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $1440.61
-39% $880.69

In stock.

Add to Cart

Sundown Audio U-18 v.2 D2 18" (U18V2D2)

4000W Peak (2000W RMS) 18" U Series Dual 2-ohm Car Subwoofer (SW-UV218D2)

SW-UV218D2 big
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio U-18 v.2 D2 18" (U18V2D2)

4000W Peak (2000W RMS) 18" U Series Dual 2-ohm Car Subwoofer (SW-UV218D2)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Pressed Paper Cone
• Double-Stitched Surround
• Mount depth: 10"
• Sensitivity: 89.41 dB

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

VIP Product Get $72.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $863.99
-17% $719.99

Available

Ships in 10-14 days

Add to Cart

Earthquake Sound HoLeeS-15

15000W 15" HoLeeS Series Competition Level Dual 1 Ohm Subwoofer

HoLeeS-15 big
Go to item page Right Arrow Icon of Right Arrow

Earthquake Sound HoLeeS-15

15000W 15" HoLeeS Series Competition Level Dual 1 Ohm Subwoofer

• 15,000W Peak
• 7,000W RMS
• Poly-ether Wide Edge Surround
• Triangular Lattice Design
• Spider Ring Design for Increased Linear Spider Position
• PSP Terminal for Easy and Quick Wiring
• Aluminum Bobbin Voice Coil

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

VIP Product Get $292.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

4
$2,919.99

In stock.

Add to Cart

American Bass Godzilla 15" (GODZILLA-1522)

12000W Peak (4700 RMS) 15" Godzilla Series Dual 2-ohm Subwoofer

GODZILLA-1522 big
Go to item page Right Arrow Icon of Right Arrow

American Bass Godzilla 15" (GODZILLA-1522)

12000W Peak (4700 RMS) 15" Godzilla Series Dual 2-ohm Subwoofer

• Peak Power: 12000 watts
• RMS Power: 4700 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Cone
• High Roll Foam Surround
• Mount depth: 11.02"
• Sensitivity: 80.7 dB

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

VIP Product Get $83.93 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $1187.94
-29% $839.33

In stock.

Add to Cart

MTX 3510-04

500W Peak (250W RMS) 10" 35 Series Single 4-ohm Car Subwoofer

3510-04 big
Go to item page Right Arrow Icon of Right Arrow

MTX 3510-04

500W Peak (250W RMS) 10" 35 Series Single 4-ohm Car Subwoofer

• Peak Power: 500 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Polypropylene Cone
• Nitrile Butadiene Rubber NBR Surround
• Mount depth: 4.625"
• Sensitivity: 83 dB

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
$109.95

Available

Ships in 10-14 days

Add to Cart
NVX - Worth the Envy - Direct to Consumer Car Audio
Prev 26 27 28 29 30 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 Universal-Fit Audio & Electronics in 2003 A6

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2003 Audi A6?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your A6.

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

    2003 Audi A6

    2005 Scion xA

    1977 Ford Courier

    2007 Acura TSX

    2012 Jeep Liberty

    2021 Audi A6

    2025 Cadillac Escalade IQ

    2007 Audi A3

    2000 Mazda Millenia

    1979 Jeep Wagoneer

    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 2003 A6
    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