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

2003 BMW 330xi

Change vehicle | Remove vehicle

Subwoofers and enclosures, specifically designed for your 2003 330xi, as well as universal fit solutions

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

Subwoofers and Boxes for 2003 BMW 330xi

A subwoofer that works with, or is designed for, your 2003 BMW 330xi will add bass, clarity and depth to your music and system. A quality subwoofer will give realism and an overall rich, complete sound that you otherwise would not get with a factory car sound system.

Subwoofer bass packages

Universal Subwoofer Bass Packages

These packages include an amp, sub(s), an enclosure and amplifier wiring. They should fit your BMW 330xi, but verify your trunk/rear vehicle area.

Universal Subwoofers

Universal Subwoofers

These sub(s) are perfect for adding to a empty box or custom built enclosure. They should work with your BMW 330xi, but verify your trunk/rear vehicle area.

Universal-fit loaded and powered sub boxes

Universal-fit Loaded Subwoofer Boxes

These boxes include sub(s) and some include an amp. They should fit your BMW 330xi, but verify your trunk/rear vehicle area.

Universal-fit empty unloaded sub boxes

Empty Universal-fit Sub Box Enclosures

These boxes are ready for you to add a sub and amp. They should fit your ride, but verify your trunk/rear vehicle area.

Dads & Grads Sale

Dads & Grads Sale

Free Gear / Open-Box Deals / Huge Discounts up to 40% off Car / Marine / ATV Audio

Filters
Reset Done
Product Type
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 (72)
S Series (43)
CompRT Series (42)
CompR Series (40)
W3 v3 Series (39)
CompC Series (37)
SA Series (35)
VC Series (32)
Prime Series (30)
CompVR Series (28)
E-Series (28)
X Series (28)
Y-Series (28)
CompVX Series (27)
Prime R2 Series (24)
HED Series (23)
R2 Series (23)
CompQ Series (22)
Power Series (22)
Apocalypse Series (21)
Comp Series (21)
VMAX Series (21)
CompVT Series (20)
SoloX Series (20)
W1 v3 Series (20)
Power T1 Series (19)
SML Series (19)
VEGA Series (19)
VS Series (19)
Z Series (19)
N-Series (18)
Solo-Baric L7T Series (18)
Type-R Series (18)
U Series (18)
W0 v3 Series (18)
Reference Series (17)
TW3 Shallow Mount Series (16)
Punch P3 Series (15)
W6 v3 Series (15)
35 Series (14)
NEO Series (14)
Punch P3 Shallow Mount Series (14)
Solo-Baric L7S Series (14)
Status Series (14)
N Series (13)
Stage Series (13)
55 Series (12)
Level 5 Series (12)
M2 Series (12)
Machete Series (12)
Solo-Baric L7R Series (12)
W7 Anniversary Edition Series (12)
T1 Slim Series (11)
W7 Series (11)
ZR Series (11)
Bass Series (10)
Club Series (10)
M Series (10)
Mille Pro Series (10)
SA Classic Series (10)
Terminator Series (10)
ZXI Series (10)
A Series (9)
EPICX Series (9)
EXL Series (9)
HD Series (9)
IXS Shallow Series (9)
Spike Series (9)
Diamond Elite Series (8)
Hippo Series (8)
L Series (8)
Level 4 Series (8)
Nightshade (NS) Series (8)
Punch P2 Series (8)
R Series (8)
REVO Series (8)
Space Series (8)
XL Series (8)
D Series (7)
Gen-X (7)
Hifonics Elite Series (7)
Hooligan Series (7)
LCS Series (7)
Level 3 Series (7)
Level 6 Series (7)
Punch P1 Series (7)
Solo-Baric L7 Series (7)
SRW Series (7)
XED Series (7)
Zero Series (7)
DMD Series (6)
Godfather Series (6)
HCCA Series (6)
HEX Series (6)
Kappa Series (6)
M1 Series (6)
SWT Series (6)
TW1 Series (6)
TW5 Shallow Mount Series (6)
VFL Comp Series (6)
75 Series (5)
BassLine Series (5)
Cento Series (5)
DES Series (5)
Excelon Reference Series (5)
MW Series (5)
SoloXS L7XS Series (5)
SQ Series (5)
XR Series (5)
BT Series (4)
CVP Series (4)
DMD-SH Series (4)
eXcelon Series (4)
EXL-X Series (4)
Godzilla Series (4)
GTR Series (4)
Hawk Series (4)
HED Slim Series (4)
King Series (4)
KM Subwoofer Series (4)
RS Series (4)
Stroker Series (4)
TB Series (4)
Tremor-X Series (4)
Arena X Series (3)
Atom Series (3)
C6 Series (3)
DB+ Series (3)
Discus Series (3)
EQ Series (3)
Gen-XX (3)
GTX Series (3)
Level 1 Series (3)
Level 2 Series (3)
Primus Series (3)
PRO-X Series (3)
Select Series (3)
StowAway Series (3)
Summo Series (3)
SWS Series (3)
TITAN Series (3)
Titanium Series (3)
TNT Series (3)
VFL Series (3)
Arena Series (2)
Champion Series (2)
DBA Series (2)
DBX Series (2)
Dieci Series (2)
DX Series (2)
Earthquake DBXI Series (2)
Elite Series (2)
ES Series (2)
GTS Series (2)
GTX Series (2)
Hannibal Series (2)
HEX PRO Series (2)
HoleeS Series (2)
Hydro Series (2)
KM Series (2)
Magma Series (2)
MicroSub Series (2)
Mille Legend Series (2)
Polk Audio MM1 Series (2)
Power T2 Series (2)
Power T3 Series (2)
R-Series (2)
SL Series (2)
SPL Show Series (2)
Stadium Series (2)
Street Reference (2)
Stroker Pro Series (2)
Subzero Series (2)
TS Series (2)
XFL Series (2)
XMAXX Series (2)
XMAXXX Monster Series (2)
XS-Series (2)
Black Air Series (1)
BOA-N Series (1)
CRW Series (1)
Diamond Shallow Series (1)
DST Series (1)
Fuse Series (1)
GT Series (1)
HF Series (1)
JackHammer Series (1)
JVC DRVN Series (1)
M4 Series (1)
M6 Series (1)
MOJO Pro Series (1)
MotorSport Series (1)
P1 Series (1)
PRO-NEO Series (1)
S65 Series (1)
SPL Monster Series (1)
Tarantula T5 Series (1)
TKO Series (1)
UFO Series (1)
Uno 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

Sundown Audio SA-18 v.2 D4 18" (SA18V2D4)

2500W Peak (1250W RMS) 18" SA Series Dual 4-ohm Car Subwoofer (SW-SAV218D4)

SW-SAV218D4 big
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio SA-18 v.2 D4 18" (SA18V2D4)

2500W Peak (1250W RMS) 18" SA Series Dual 4-ohm Car Subwoofer (SW-SAV218D4)

• Peak Power: 2500 watts
• RMS Power: 1250 watts
• Impedance: Dual 4 ohm
• Competition Grade Paper cone
• Foam surround
• Mount depth: 10.125"
• Sensitivity: 90.7 dB

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

VIP Product Get $50.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $599.99
-17% $499.99

In stock

Add to Cart

Kicker CWTB84 (46CWTB84)

600W Peak (300W RMS) Loaded Dual 8" Subwoofer and Passive Radiator Tube Enclosure

CWTB84 big
Go to item page Right Arrow Icon of Right Arrow

Kicker CWTB84 (46CWTB84)

600W Peak (300W RMS) Loaded Dual 8" Subwoofer and Passive Radiator Tube Enclosure

• Enclosure with 2 8" TB Series Subwoofer
• Loaded with active CompR woofer and passive Reflex sub
• 300 watts RMS (600 watts Peak)
• Final Impedance: 4-ohm
• Dimensions: 8-1/2" L x 17-1/16 H1 x 10-3/4 H2 x 12-7/8" W2

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 $329.99
-9% $299.99

In stock

Only 2 Left!

Add to Cart

Atrend E8DV

Empty Dual 8" Ported Enclosure

E8DV big
Go to item page Right Arrow Icon of Right Arrow

Atrend E8DV

Empty Dual 8" Ported Enclosure

• 8" Dual Ported Subwoofer Enclosure
• 1" Medium Density Fiberboard (MDF) construction
• Total box volume: 1.62 cubic feet
• Premium carpeted finish
• Made in the USA

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
-22% $117.00

In stock

Only 1 Left!

Add to Cart

Cerwin-Vega H10DV4

1650W Peak (550W RMS) 10" HED Series Dual 4-ohm Subwoofer

H10DV4 big
Go to item page Right Arrow Icon of Right Arrow

Cerwin-Vega H10DV4

1650W Peak (550W RMS) 10" HED Series Dual 4-ohm Subwoofer

• Peak Power: 1650 watts
• RMS Power: 550 watts
• Impedance: Dual 4 ohm
• Hybrid Polypropylene-Treated Paper cone
• TPE Surround
• Mount depth: 5.41"
• 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

List price $167.99
-17% $139.99

In stock

Only 3 Left!

Add to Cart

DS18 EBM-FFPUNI-4X8

Empty Quad 8" Vented Enclosure

EBM-FFPUNI-4X8 big
Go to item page Right Arrow Icon of Right Arrow

DS18 EBM-FFPUNI-4X8

Empty Quad 8" Vented Enclosure

• Empty 8" Quad Ported Subwoofer Enclosure
• 3/4" medium density fiberboard construction with sprayliner finish
• Vented front-firing design enhances sound projection
• Under seat enclosure mounting

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

VIP Product Get $48.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

$479.95

In stock

Only 1 Left!

Add to Cart

Stinger EPICX V8

600W Peak (400W RMS) Loaded Single 8" Vented Subwoofer Enclosure

EPICX V8 big
Go to item page Right Arrow Icon of Right Arrow

Stinger EPICX V8

600W Peak (400W RMS) Loaded Single 8" Vented Subwoofer Enclosure

• Ported enclosure with 1 8" EPICX Series Subwoofer
• 400 watts RMS (600 watts Peak)
• Final Impedance: 1-ohm
• Dimensions: 13.11" L x 12.44" H x 10.6" W x 14.25" W2

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 $309.00
-23% $239.00

In stock

Only 1 Left!

Add to Cart

• Ported enclosure with 1 8" EPICX Series Subwoofer
• 400 watts RMS (600 watts Peak)
• Final Impedance: 1-ohm
• Dimensions: 13.11" L x 12.44" H x 10.6" W x 14.25" W2

Atrend 12SVN

Empty Single 12" Vented Enclosure for Alpine E-S-R-X Series Subwoofers

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

Atrend 12SVN

Empty Single 12" Vented Enclosure for Alpine E-S-R-X Series Subwoofers

• 12" Single Ported Subwoofer Enclosure
• Fits Alpine E, S, R, and X series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 1.4 cubic feet

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 $124.99
-12% $109.99

In stock

Only 2 Left!

Add to Cart
Lowest price in 30 days

Sundown Audio X-10 v.3 D1 10" (X10V3D1)

5000W Peak (2500W RMS) 10" X Series Dual 1-ohm Car Subwoofer (SW-XV310D1)

SW-XV310D1 big
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio X-10 v.3 D1 10" (X10V3D1)

5000W Peak (2500W RMS) 10" X Series Dual 1-ohm Car Subwoofer (SW-XV310D1)

• Peak Power: 5000 watts
• RMS Power: 2500 watts
• Impedance: Dual 1 ohm
• Pressed Paper Cone
• Mega Roll V2 Surround
• Mount depth: 9.4"
• Sensitivity: 83.8 dB

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

VIP Product Get $65.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $779.99
-17% $649.99

In stock

Add to Cart

Bazooka BT1214 (Open Box, Good)

250W Peak Loaded Single 10" Non-Amplified Ported Subwoofer Bass Tube Enclosure

BT1214-2 big
Go to item page Right Arrow Icon of Right Arrow

Bazooka BT1214 (Open Box, Good)

250W Peak Loaded Single 10" Non-Amplified Ported Subwoofer Bass Tube Enclosure

• Ported enclosure with 1 12" Subwoofer
• 250 watts Peak
• Final Impedance: 4-ohm
• Dimensions: 22.5" L x 14.4" H x 12.1" W

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 $299.99
-17% $249.99

In stock

Only 1 Left!

Add to Cart

Hertz CS 300 S2

700W Peak (350W RMS) 12" Cento Series Single 2-ohm Shallow Mount Car Subwoofer

CS 300 S2 big
Go to item page Right Arrow Icon of Right Arrow

Hertz CS 300 S2

700W Peak (350W RMS) 12" Cento Series Single 2-ohm Shallow Mount Car Subwoofer

• Peak Power: 700 watts
• RMS Power: 350 watts
• Impedance: Single 2 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 5.12"
• Sensitivity: 86.5 dB

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

VIP Product Get $33.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $340.00
$329.99

In stock

Only 1 Left!

Add to Cart
Limited time!

Kicker TCWRT672 (48TCWRT672)

300W Peak (150W RMS) Loaded Single 6.75" Sealed Truck Enclosure with Passive Radiator

TCWRT672 big
Go to item page Right Arrow Icon of Right Arrow

Kicker TCWRT672 (48TCWRT672)

300W Peak (150W RMS) Loaded Single 6.75" Sealed Truck Enclosure with Passive Radiator

• Sealed truck enclosure with 2 6.75" CompRT Series Subwoofer
• 150 watts RMS (300 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 15-1/4" L x 10" H x 3-5/16" W x 5-11/16" W2

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 $209.99
Save $58.03
-28% $151.96

In stock

Add to Cart

Hertz MPBX 250 S2

1000W Peak (500W RMS) Loaded Single 10" Shallow Sealed Enclosure

MPBX 250 S2 big
Go to item page Right Arrow Icon of Right Arrow

Hertz MPBX 250 S2

1000W Peak (500W RMS) Loaded Single 10" Shallow Sealed Enclosure

• Sealed enclosure with 1 10" Mille Pro Series Subwoofer
• 500 watts RMS (1000 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 20.9" L x 6.30" H x 14.21" W

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 $810.00
-14% $699.99

In stock

Only 3 Left!

Add to Cart

DS18 EXL-X6.2D

800W Peak (400W RMS) 6.5" EXL-X Series Dual 2-ohm Car Subwoofer

EXL-X6.2D big
Go to item page Right Arrow Icon of Right Arrow

DS18 EXL-X6.2D

800W Peak (400W RMS) 6.5" EXL-X Series Dual 2-ohm Car Subwoofer

• Peak Power: 800 watts
• RMS Power: 400 watts
• Impedance: Dual 2 ohm
• Non-Pressed Paper Cone
• Foam Surround
• Mount depth: 4.25"
• Sensitivity: 89.8 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

$119.95

In stock.

Add to Cart

• Peak Power: 800 watts
• RMS Power: 400 watts
• Impedance: Dual 2 ohm
• Non-Pressed Paper Cone
• Foam Surround
• Mount depth: 4.25"
• Sensitivity: 89.8 dB

Limited time!

Kicker CWCD124 (50CWCD124)

600W Peak (300W RMS) 12" CompC Series Dual 4-ohm Car Subwoofer

50CWCD124 big
Go to item page Right Arrow Icon of Right Arrow

Kicker CWCD124 (50CWCD124)

600W Peak (300W RMS) 12" CompC Series Dual 4-ohm Car Subwoofer

• Peak Power: 600 watts
• RMS Power: 150-300 watts
• Impedance: Dual 4 ohm
• Injection Molded Polypropylene Cone
• Ribbed Polyurethane Surround
• Mount depth: 5-3/4"
• Sensitivity: 87.1 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 $169.99
Save $50.03
-29% $119.96

In stock

Only 3 Left!

Add to Cart
Used from: $104.99

DC Audio 8M4D2

1600W Peak (800W RMS) 8" M4 Series Dual 2-ohm Car Subwoofer

M4-8 D2 big
Go to item page Right Arrow Icon of Right Arrow

DC Audio 8M4D2

1600W Peak (800W RMS) 8" M4 Series Dual 2-ohm Car Subwoofer

• Peak Power: 1600 watts
• RMS Power: 800 watts
• Impedance: Dual 2 ohm
• Non-Pressed Paper Cone
• Multi-layered Polymer Foam Surround
• Mount depth: 7.0"
• Sensitivity: 78.4 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 $399.99
-21% $314.99

In stock.

Add to Cart

Hifonics Elite 8" (HEW8D2)

1200W Peak (600W RMS) 8" Hifonics Elite Series Dual 2-ohm Subwoofer

HEW8D2 big
Go to item page Right Arrow Icon of Right Arrow

Hifonics Elite 8" (HEW8D2)

1200W Peak (600W RMS) 8" Hifonics Elite Series Dual 2-ohm Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• Double Stitched Foam Surround
• Mount depth: 5.66"
• Sensitivity: 81.2 dB

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

VIP Product Get $16.90 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

$169.00

In stock

Add to Cart

Kenwood eXcelon XR-W1204

2000W Peak (400W RMS) 12" eXcelon Reference Series Single 4-ohm Oversized Car Subwoofer

XR-W1204 big
Go to item page Right Arrow Icon of Right Arrow

Kenwood eXcelon XR-W1204

2000W Peak (400W RMS) 12" eXcelon Reference Series Single 4-ohm Oversized Car Subwoofer

• Peak Power: 2000 watts
• RMS Power: 400 watts
• Impedance: Single 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 5-5/8"
• Sensitivity: 83 dB

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

VIP Product Get $23.90 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $290.00
-18% $239.00

In stock

Only 1 Left!

Add to Cart

Hertz MPS 300 S2

1000W Peak (500W RMS) 12" Mille Pro Series Single 2-ohm Shallow Car Subwoofer

MPS 300 S2 big
Go to item page Right Arrow Icon of Right Arrow

Hertz MPS 300 S2

1000W Peak (500W RMS) 12" Mille Pro Series Single 2-ohm Shallow Car Subwoofer

• Peak Power: 1000 watts
• RMS Power: 500 watts
• Impedance: Single 2 ohm
• Polypropylene Cone material
• Rubber Surround material
• Mount depth: 3.46"
• Sensitivity: 84.5 dB

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

1
List price $695.00
-14% $599.99

In stock

Only 3 Left!

Add to Cart

JBL CLUB1000D (JBLSUBCB1000D)

2800W Peak (1400W RMS) Loaded Dual 10" Vented Enclosure

CLUB1000D big
Go to item page Right Arrow Icon of Right Arrow

JBL CLUB1000D (JBLSUBCB1000D)

2800W Peak (1400W RMS) Loaded Dual 10" Vented Enclosure

• Ported enclosure with 2 10" Club Series Subwoofer
• 700 watts RMS (1400 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 26" L x 14.13" H x 17" W

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

VIP Product Get $50.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $549.95
-9% $499.95

In stock

Add to Cart

DS18 IXS12.2D

1600W Peak (800W RMS) 12" IXS Series Dual 2-ohm Shallow Car Subwoofer

IXS12.2D big
Go to item page Right Arrow Icon of Right Arrow

DS18 IXS12.2D

1600W Peak (800W RMS) 12" IXS Series Dual 2-ohm Shallow Car Subwoofer

• Peak Power: 1600 watts
• RMS Power: 800 watts
• Impedance: Dual 2 ohm
• Paper Cone
• Rubber Surround
• Mount depth: 4.33"
• Sensitivity: 85 dB

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

VIP Product Get $26.40 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

2
$263.95

In stock

Add to Cart
Prev 24 25 26 27 28 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 Subwoofer and Sub Box Upgrades in 2003 330xi

    Q: Can I upgrade or change the Subwoofer and Sub Box Upgrades in 2003 BMW 330xi?

    A: Yes this page includes all the best Subwoofer and Sub Box Upgrades that work in your 330xi.

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

    1973 Mercury Cougar

    2008 Chrysler Pacifica

    2016 Maserati Ghibli

    2003 BMW 330xi

    1999 Saturn SL

    1990 Mitsubishi Mighty Max

    1999 Jeep Cherokee

    2006 Maserati Coupe

    2008 Toyota Solara

    2017 Dodge Journey

    Vehicle
    Store     Delete

    2004 Harley Davidson FLHT Electra Glide Standard

    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 330xi
    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