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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.
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S Series (43)
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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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Soundstream RSW.152

2600W Peak (1300W RMS) 15" Reserve Series Dual 2-ohm Car Subwoofer

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Soundstream RSW.152

2600W Peak (1300W RMS) 15" Reserve Series Dual 2-ohm Car Subwoofer

• Peak Power: 2600 watts
• RMS Power: 1300 watts
• Spruce Pulp cone
• Polyether Foam surround
• Impedance: Dual 2 ohm
• Mount depth: 8-5/6"
• Sensitivity: 83.5 dB

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Kicker CWCS124 (50CWCS124)

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

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Kicker CWCS124 (50CWCS124)

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

• Peak Power: 600 watts
• RMS Power: 150-300 watts
• Impedance: Single 4 ohm
• Injection Molded Polypropylene Cone
• Ribbed Polyurethane Surround
• Mount depth: 5-3/4"
• Sensitivity: 87.3 dB

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JBL CLUB1200P (JBLSUBCB1200P)

1200W Peak (400W RMS) Loaded Single 12" Vented Enclosure

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JBL CLUB1200P (JBLSUBCB1200P)

1200W Peak (400W RMS) Loaded Single 12" Vented Enclosure

• Ported enclosure with 1 12" Club Series Subwoofer
• 400 watts RMS (1200 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 21.88" L x 14.88" H x 17.13" W

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Rockford Fosgate Power T3 T3S2-19

6000W Peak (3000W RMS) 19" Power Series Single 2-ohm Super Car Subwoofer

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Rockford Fosgate Power T3 T3S2-19

6000W Peak (3000W RMS) 19" Power Series Single 2-ohm Super Car Subwoofer

• Peak Power: 6000 watts
• RMS Power: 3000 watts
• Impedance: Single 2 ohm
• Glass Fiber Cone
• Injection molded foam Surround
• Mount depth: 15.62"
• Sensitivity: 90 dB

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Massive Audio SUMMOXL154

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

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Massive Audio SUMMOXL154

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

• Peak Power: 3000 watts
• RMS Power: 1500 watts
• Impedance: Dual 4 ohm
• Non-Pressed Paper Cone
• Foam Surround
• Mount depth: 8.58"
• Sensitivity: 93.8 dB

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Kenwood eXcelon KFC-XW1041

1300W Peak (300W RMS) 10" eXcelon Series Single 4-ohm Car Subwoofer

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Kenwood eXcelon KFC-XW1041

1300W Peak (300W RMS) 10" eXcelon Series Single 4-ohm Car Subwoofer

• Peak Power: 1300 watts
• RMS Power: 300 watts
• Impedance: Single 4 ohm
• Injection Molded Polypropylene Cone
• Urethane Surround
• Mount depth: 4-7/8"
• Sensitivity: 84 dB

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Kicker CWCS104 (50CWCS104)

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

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Kicker CWCS104 (50CWCS104)

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

• Peak Power: 500 watts
• RMS Power: 125-250 watts
• Impedance: Single 4 ohm
• Injection Molded Polypropylene Cone
• Ribbed Polyurethane Surround
• Mount depth: 5-3/16"
• Sensitivity: 85.9 dB

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Sundown Audio NS v.6 D1 10" (NSV610D1)

7000W Peak (3500W RMS) 10" Nightshade Series Dual 1-ohm Car Subwoofer (SW-NSV610D1)

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Sundown Audio NS v.6 D1 10" (NSV610D1)

7000W Peak (3500W RMS) 10" Nightshade Series Dual 1-ohm Car Subwoofer (SW-NSV610D1)

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Treated Paper Cone
• Mega Roll V2 Surround
• Sensitivity: 81.77 dB

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MTX 5512-44

800W Peak (400W RMS) 12" 55 Series Dual 4-ohm Car Subwoofer

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MTX 5512-44

800W Peak (400W RMS) 12" 55 Series Dual 4-ohm Car Subwoofer

• Peak Power: 800 watts
• RMS Power: 400 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 6.188"
• Sensitivity: 85.7 dB

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Belva BPKGW122

600W Peak 12" Single 2-Ohm Car Audio Subwoofer

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Belva BPKGW122

600W Peak 12" Single 2-Ohm Car Audio Subwoofer

• 600 Watts Max
• Polypropylene Cone
• Durable Rubber Surround
• 1.5" black aluminum voice coil
• 37 oz. ferrite magnet motor structure

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Alpine RS-W10D2

1800W Peak (600W RMS) 10” R-Series Dual 2-ohm Shallow Car Subwoofer

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Alpine RS-W10D2

1800W Peak (600W RMS) 10” R-Series Dual 2-ohm Shallow Car Subwoofer

• Peak Power: 1800 watts
• RMS Power: 600 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• Butyl Rubber Surround
• Mount depth: 3.25"
• Sensitivity: 79 dB

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Precision Power AW-12D2

1200W Peak (600W RMS) 12" ATOM Series Dual 2-Ohm Car Subwoofer

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Precision Power AW-12D2

1200W Peak (600W RMS) 12" ATOM Series Dual 2-Ohm Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 2 ohm
• Non-Transfer Spruce Pulp cone
• surround
• Mount depth: 6.25"
• Sensitivity: 84 dB

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Kicker CWQ154 (51CWQ154)

2400W Peak (1200W RMS) 15" CompQ Series Dual 4-ohm Subwoofer

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Kicker CWQ154 (51CWQ154)

2400W Peak (1200W RMS) 15" CompQ Series Dual 4-ohm Subwoofer

• Peak Power: 2400 watts
• RMS Power: 1200 watts
• Impedance: Dual 4 ohm
• SoloKon Polypropylene Cone
• Blue-stitched Santoprene Rubber Surround
• Mount depth: 8-15/1"
• Sensitivity: 88 dB

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Sundown Audio U-10 v.2 D2 10" (U10V2D2)

4000W Peak (2000W RMS) 10" U Series Dual 2-ohm Car Subwoofer (SW-UV210D2)

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Sundown Audio U-10 v.2 D2 10" (U10V2D2)

4000W Peak (2000W RMS) 10" U Series Dual 2-ohm Car Subwoofer (SW-UV210D2)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Pressed Paper Cone
• Double-Stitched Surround
• Mount depth: 8.15"
• Sensitivity: 82.95 dB

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Sundown Audio NS v.6 D2 18" (NSV618D2)

7000W Peak (3500W RM)S 18" Nightshade Series Dual 2-ohm Car Subwoofer (SW-NSV618D2)

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Sundown Audio NS v.6 D2 18" (NSV618D2)

7000W Peak (3500W RM)S 18" Nightshade Series Dual 2-ohm Car Subwoofer (SW-NSV618D2)

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• Mega Roll V2 Surround
• Sensitivity: 87.57 dB

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DS18 ZR6.4D

600W Peak (300W RMS) 6.5" ZR Series Dual 4-ohm Car Subwoofer

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DS18 ZR6.4D

600W Peak (300W RMS) 6.5" ZR Series Dual 4-ohm Car Subwoofer

• Peak Power: 600 watts
• RMS Power: 300 watts
• Non-Pressed Paper Cone
• Foam Surround
• Impedance: Dual 4 ohm
• Mount depth: 3.49"
• Sensitivity: 82 dB

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Cerwin Vega HS122D

1200W Peak (250W RMS) 12" HED Series Dual 2-ohm Shallow Subwoofer

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Cerwin Vega HS122D

1200W Peak (250W RMS) 12" HED Series Dual 2-ohm Shallow Subwoofer

• Peak Power: 1200 watts
• RMS Power: 250 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Polypropylene Cone
• Treated Foam Surround
• Mount depth: 3.81"
• Sensitivity: 85 dB

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Atrend 12DVN

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

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Atrend 12DVN

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

• 12" Dual 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: 2.8 cubic feet

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Kicker CWTB82 (46CWTB82)

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

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Kicker CWTB82 (46CWTB82)

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: 2-ohm
• Dimensions: 8-1/2" L x 17-1/16 H1 x 10-3/4 H2 x 12-7/8 W2

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Infinity Reference 123WSL (INFSUBRF123WSL)

1200W Peak (400W RMS) 12” Reference Series Dual 2-or 4-ohm Shallow Car Subwoofer

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Infinity Reference 123WSL (INFSUBRF123WSL)

1200W Peak (400W RMS) 12” Reference Series Dual 2-or 4-ohm Shallow Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 400 watts
• Impedance: Dual 2 or 4 ohm
• Aluminum Cone
• Hi-Roll Rubber Surround
• Mount depth: 3-1/4"
• Sensitivity: 84 dB

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List price $319.95
-9% $289.95

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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?

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