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2003 BMW 330xi

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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.

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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)
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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)
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W6 v3 Series (15)
35 Series (14)
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Punch P3 Shallow Mount Series (14)
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RS Series (4)
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TB Series (4)
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ES Series (2)
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MicroSub Series (2)
Mille Legend Series (2)
Polk Audio MM1 Series (2)
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S65 Series (1)
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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.
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Sundown Audio E8 v.6 D4 8" (E8V6D4)

800W Peak (400W RMS) 8" E Series Dual 4-ohm Car Subwoofer (SW-EV68D4)

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Sundown Audio E8 v.6 D4 8" (E8V6D4)

800W Peak (400W RMS) 8" E Series Dual 4-ohm Car Subwoofer (SW-EV68D4)

• Peak Power: 800 watts
• RMS Power: 400 watts
• Impedance: Dual 4 ohm
• Pressed Paper Cone
• Pressed Foam Surround
• Mount depth: 4.98"
• Sensitivity: 81.3 dB

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List price $203.99
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AudioControl SPC-W10

600W Peak (400W RMS) Loaded Single 10" Sealed Truck Enclosure

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AudioControl SPC-W10

600W Peak (400W RMS) Loaded Single 10" Sealed Truck Enclosure

• Sealed truck enclosure with 1 10" Space Series Subwoofer
• 400 watts RMS (600 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 19.10" L x 12.36" H x 4.095" W x 6.276" W2

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Deaf Bonce Machete ML-12S D2

600W Peak (300W RMS) 12” Machete Series Dual 2-ohm Car Subwoofer

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Deaf Bonce Machete ML-12S D2

600W Peak (300W RMS) 12” Machete Series Dual 2-ohm Car Subwoofer

• Peak Power: 600 watts
• RMS Power: 300 watts
• Pressed Paper Cone
• Foam Surround
• Impedance: Dual 2 ohm
• Mount depth: 5.06"
• Sensitivity: 88.90 dB

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Atrend 10SVN

Empty Single 10" Vented Enclosure for Alpine E-S-R-X Series Subwoofers

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Atrend 10SVN

Empty Single 10" Vented Enclosure for Alpine E-S-R-X Series Subwoofers

• 10" 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: 1.2 cubic feet

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Kicker Comp 15 (43C154)

500W Peak (250W RMS) 15" Comp Series Single 4-ohm Subwoofer

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Kicker Comp 15 (43C154)

500W Peak (250W RMS) 15" Comp Series Single 4-ohm Subwoofer

• Peak Power: 500 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Injection Molded Polypropylene cone
• Foam surround
• Mount depth: 7-7/16"
• Sensitivity: 90.3 dB

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American Bass TITAN-1544

3000W Peak (1500W RMS) 15" Titan Series Dual 4-ohm Car Subwoofer

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American Bass TITAN-1544

3000W Peak (1500W RMS) 15" Titan Series Dual 4-ohm Car Subwoofer

• Peak Power: 3000 watts
• RMS Power: 1500 watts
• Impedance: Dual 4 ohm
• Kevlar Fiber-Enforced Non-Pressed Paper cone
• Foam surround
• Mount depth: 7.63"
• Sensitivity: 87.9 dB

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DS18 SLC8S

400W Peak (200W RMS) 8" SELECT Series Single 4-ohm Car Subwoofer

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DS18 SLC8S

400W Peak (200W RMS) 8" SELECT Series Single 4-ohm Car Subwoofer

• Peak Power: 400 watts
• RMS Power: 200 watts
• Impedance: Single 4 ohm
• Paper Cone
• Foam Surround
• Mount depth: 3.85"
• Sensitivity: 84 dB

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Cerwin Vega ST124D

2000W Peak (1000W RMS) 12" Stroker Series Dual 4-ohm Subwoofer

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Cerwin Vega ST124D

2000W Peak (1000W RMS) 12" Stroker Series Dual 4-ohm Subwoofer

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 4 ohm
• Treated Semi-Pressed Pulped cone
• Treated Foam surround
• Mount depth: 8.1"
• Sensitivity: 84.8 dB

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Sundown Audio Z-12 v.6 D1 12" (Z12V6D1)

6500W Peak (3250W RMS) 12" Z Series Dual 1-ohm Car Subwoofer (SW-ZV612D1)

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Sundown Audio Z-12 v.6 D1 12" (Z12V6D1)

6500W Peak (3250W RMS) 12" Z Series Dual 1-ohm Car Subwoofer (SW-ZV612D1)

• Peak Power: 6500 watts
• RMS Power: 3250 watts
• Impedance: Dual 1 ohm
• Treated Paper Cone
• Mega Roll V2 Surround
• Mount depth: 11.75"
• Sensitivity: 83.73 dB

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Massive Audio GTR64

600W Peak (400W RMS) 6.5" GTR Series Dual 4-ohm Car Subwoofer

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Massive Audio GTR64

600W Peak (400W RMS) 6.5" GTR Series Dual 4-ohm Car Subwoofer

• Peak Power: 600 watts
• RMS Power: 400 watts
• Impedance: Dual 4 ohm
• Textured Non-Pressed Pulp with Resin cone
• High Roll Foam surround
• Sensitivity: 79.5 dB

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List price $112.45
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Hifonics Elite 8" (HEW8D4S)

500W Peak (250W RMS) 8" Hifonics Elite Series Dual 4-ohm Shallow Subwoofer

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Hifonics Elite 8" (HEW8D4S)

500W Peak (250W RMS) 8" Hifonics Elite Series Dual 4-ohm Shallow Subwoofer

• Peak Power: 500 watts
• RMS Power: 250 watts
• Impedance: Dual 4 ohm
• Woven Fiber Cone
• UV Treated Foam Surround
• Mount depth: 2.63"
• Sensitivity: 82 dB

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Rockford Fosgate Prime R2 R2SD4-12

500W Peak (250W RMS) 12" Prime Series Dual 4-ohm Shallow Car Subwoofer

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Rockford Fosgate Prime R2 R2SD4-12

500W Peak (250W RMS) 12" Prime Series Dual 4-ohm Shallow Car Subwoofer

• Peak Power: 500 watts
• RMS Power: 250 watts
• Impedance: Dual 4 ohm
• Mica Injected Polypropylene - MIPP Cone
• Poly-Foam Surround
• Mount depth: 3.602"
• Sensitivity: 85 dB

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AudioControl SPK-12S2

700W RMS 12" Spike Series Single 2-ohm High-Performance Car Subwoofer

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AudioControl SPK-12S2

700W RMS 12" Spike Series Single 2-ohm High-Performance Car Subwoofer

• RMS Power: 700 watts
• Impedance: Single 2 ohm
• Paper Fiber with Mica Coating Cone
• Rubber Surround
• Mount depth: 6.14"
• Sensitivity: 84.6196 dB

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Atrend 12KS

Empty Single 12" Sealed Enclosure for Kicker L7R and L7S Series Subwoofers

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Atrend 12KS

Empty Single 12" Sealed Enclosure for Kicker L7R and L7S Series Subwoofers

• 12" Single Sealed Subwoofer Enclosure
• Fits Kicker L7R and L7S 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: 1.75 cubic feet

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Bazooka WF1242DV

600W RMS 12" Dual 4-ohm Replacement Woofer for BT1224DVC

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Bazooka WF1242DV

600W RMS 12" Dual 4-ohm Replacement Woofer for BT1224DVC

• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• Compressed Foam Surround
• Sensitivity: 106 dB

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• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• Compressed Foam Surround
• Sensitivity: 106 dB

Pioneer TS-A30S4

1400W Peak (400W RMS) 12" A-Series Single 4-ohm Car Subwoofer

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Pioneer TS-A30S4

1400W Peak (400W RMS) 12" A-Series Single 4-ohm Car Subwoofer

• Peak Power: 1400 watts
• RMS Power: 400 watts
• Impedance: Single 4 ohm
• Injection Molded Polypropylene Cone
• Rubber Surround
• Mount depth: 5-3/8"
• Sensitivity: 87 dB

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Rockford Fosgate Prime R2 R2-2X10

2000W Peak (1000W RMS) 10" Prime R2 Series Dual 2-Ohm Sealed Subwoofer Enclosure

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Rockford Fosgate Prime R2 R2-2X10

2000W Peak (1000W RMS) 10" Prime R2 Series Dual 2-Ohm Sealed Subwoofer Enclosure

• 1000 watts Dual 10" Sealed Subwoofer Enclosure
• Dual 2 ohm Impedance
• Spring-loaded Terminal Posts
• Enclosure Dimensions: 12.5" TD x 7.5" BD x 30.12" W x 12.20" H

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Deaf Bonce Machete ML-10S D2

600W Peak (300W RMS) 10” Machete Series Dual 2-ohm Car Subwoofer

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Deaf Bonce Machete ML-10S D2

600W Peak (300W RMS) 10” Machete Series Dual 2-ohm Car Subwoofer

• Peak Power: 600 watts
• RMS Power: 300 watts
• Pressed Paper Cone
• Foam Surround
• Impedance: Dual 2 ohm
• Mount depth: 4.57"
• Sensitivity: 85.9 dB

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• Peak Power: 600 watts
• RMS Power: 300 watts
• Pressed Paper Cone
• Foam Surround
• Impedance: Dual 2 ohm
• Mount depth: 4.57"
• Sensitivity: 85.9 dB

Kicker CVR12 (52CVR122)

900W Peak (450W RMS) 12" CompVR Series Dual 2-ohm Car Subwoofer

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Kicker CVR12 (52CVR122)

900W Peak (450W RMS) 12" CompVR Series Dual 2-ohm Car Subwoofer

• Peak Power: 900 watts
• RMS Power: 450 watts
• Impedance: Dual 2 ohm
• Injection Molded Polypropylene Cone
• ISD (Inverted Structural Dome)
• Santoprene Rubber Surround
• Mount depth: 6-3/8"
• Sensitivity: 86.9 dB

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Diamond Audio DES102

800W Peak (400W RMS) 10" DES Series Dual 2-ohm Car Subwoofer

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Diamond Audio DES102

800W Peak (400W RMS) 10" DES Series Dual 2-ohm Car Subwoofer

• Peak Power: 800 watts
• RMS Power: 400 watts
• Fiber-Reinforced High Strength Paper Cone
• Impedance: Dual 2 ohm
• Sensitivity: 80.6 dB

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    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.

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