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.

Up to 199.99 watts (39)

200–399.99 watts (261)

400–799.99 watts (407)

800–1,199.99 watts (153)

1,200–1,999.99 watts (69)

2,000 watts or more (203)

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.

Up to 299.99 watts (6)

300–499.99 watts (56)

500–799.99 watts (162)

800–1,199.99 watts (184)

1,200–1,599.99 watts (176)

1,600–2,399.99 watts (172)

2,400 watts or more (257)

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 (24)

Power Series (22)

Apocalypse Series (21)

W7 Anniversary Edition Series (12)

Prime Series (11)

Reference Series (11)

Solo-Baric L7S Series (11)

Solo-Baric L7T Series (11)

Nightshade (NS) Series (9)

Power T1 Series (9)

Prime R2 Series (9)

TW3 Shallow Mount Series (9)

Diamond Elite Series (8)

Hifonics Elite Series (8)

Hippo Series (8)

Level 4 Series (8)

Mille Pro Series (8)

SA Classic Series (8)

Solo-Baric L7R Series (8)

IXS Shallow Series (7)

SoloXS L7XS Series (5)

Space Series (5)

Stage Series (5)

Terminator Series (5)

Punch P3 Shallow Mount Series (4)

TW5 Shallow Mount Series (4)

Solo-Baric L7 Series (3)

Earthquake DBXI Series (2)

Elite Series (2)

ES Series (2)

Excelon Reference Series (2)

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Polk Audio MM1 Series (2)

Stroker Pro Series (2)

XMAXXX Monster Series (2)

Diamond Shallow Series (1)

GT Series (1)

HF Series (1)

JackHammer Series (1)

SPL Monster Series (1)

Tarantula T5 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.

No (910)

Yes (202)

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.

Dual (2 voice coils) (864)

Single (1 voice coil) (265)

Triple (3 voice coils) (4)

Quad (4 voice coils) (1)

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.

Sort Impedance (Per Voice Coil) alphanumerically

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.

Round (1,070)

Square (63)

Oval (1)

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.

Up to 0.99 cubic feet (242)

1–1.99 cubic feet (108)

2 cubic feet or more (18)

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.

Up to 0.99 cubic feet (83)

1–1.99 cubic feet (138)

2 cubic feet or more (127)

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.

Bandpass (17)

Ported / Vented (1,033)

Sealed (847)

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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Condition

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Like New & Used (141)

Availability

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In stock. Ships from manufacturer (147)

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Massive Audio UFO10V2

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

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Massive Audio UFO10V2

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

• Peak Power: 600 watts
• RMS Power: 300 watts
• Impedance: Dual 4 ohm
• Injection Molded Polypropylene Cone
• Foam Surround
• Mount depth: 2.95"
• Sensitivity: 86 dB

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Rockford Fosgate Power T2 T2S2-16

5000W Peak (2500W RMS) 16" Power Series Single 2-ohm Car Subwoofer

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Rockford Fosgate Power T2 T2S2-16

5000W Peak (2500W RMS) 16" Power Series Single 2-ohm Car Subwoofer

• Peak Power: 5000 watts
• RMS Power: 2500 watts
• Impedance: Single 2 ohm
• Glass Fiber Cone
• Injection molded foam Surround
• Mount depth: 10.47"
• Sensitivity: 90 dB

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Massive Audio SUMMOXL104

3000W Peak (1500W RMS) 10" SUMMO Series Dual 4-ohm Car Subwoofer

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Massive Audio SUMMOXL104

3000W Peak (1500W RMS) 10" 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: 6.81"
• Sensitivity: 90.3 dB

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Sundown Audio M-10 D2 10" (M10D2)

4000W Peak (2000W RMS) 10" M Series Dual 2-ohm Car Subwoofer (SW-M10D2)

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Sundown Audio M-10 D2 10" (M10D2)

4000W Peak (2000W RMS) 10" M Series Dual 2-ohm Car Subwoofer (SW-M10D2)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Polypropylene cone
• High Roll Foam surround
• Mount depth: 10.09"
• Sensitivity: 79.14 dB

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Kicker CompC CWCS124 (44CWCS124) (Open Box, Great)

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

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Kicker CompC CWCS124 (44CWCS124) (Open Box, Great)

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

• Peak Power: 600 watts
• RMS Power: 300 watts
• Injection Molded Polypropylene Cone
• Polyurethane Surround
• Impedance: Single 4 ohm
• Mount depth: 5-3/8"
• Sensitivity: 88.3 dB

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• Peak Power: 600 watts
• RMS Power: 300 watts
• Injection Molded Polypropylene Cone
• Polyurethane Surround
• Impedance: Single 4 ohm
• Mount depth: 5-3/8"
• Sensitivity: 88.3 dB

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Kicker CWR82 (48CWR82)

600W Peak (300W RMS) 8” CompRT Series Dual 2-ohm Subwoofer

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Kicker CWR82 (48CWR82)

600W Peak (300W RMS) 8” CompRT Series Dual 2-ohm Subwoofer

• Peak Power: 600 watts
• RMS Power: 150-300 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• Santoprene Rubber Surround
• Mount depth: 4 1/8"
• Sensitivity: 82.1 dB

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Soundstream T5.122

2000W Peak (1000W RMS) 12" Tarantula T5 Series Dual 2-ohm Car Subwoofer

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Soundstream T5.122

2000W Peak (1000W RMS) 12" Tarantula T5 Series Dual 2-ohm Car Subwoofer

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 2 ohm
• Spruce Pulp cone
• Polyether Foam surround
• Mount depth: 7"
• Sensitivity: 86 dB

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2) Rockford Fosgate R2 R2SD4-10

800W Peak (400W RMS) 10" Prime R2 Series Shallow-mount Dual 4-ohm Subwoofer (Pair)

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2) Rockford Fosgate R2 R2SD4-10

800W Peak (400W RMS) 10" Prime R2 Series Shallow-mount Dual 4-ohm Subwoofer (Pair)

• Peak Power: 400 watts
• RMS Power: 200 watts
• Impedance: Dual 4 ohm
• Mica Injected Polypropylene - MIPP Cone
• Foam Surround
• Mount depth: 3.417"
• Sensitivity: 82 dB

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• Peak Power: 400 watts
• RMS Power: 200 watts
• Impedance: Dual 4 ohm
• Mica Injected Polypropylene - MIPP Cone
• Foam Surround
• Mount depth: 3.417"
• Sensitivity: 82 dB

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Kicker CWR122 (48CWR122)

1000W Peak (500W RMS) 12” CompR Series Dual 2-ohm Subwoofer

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Kicker CWR122 (48CWR122)

1000W Peak (500W RMS) 12” CompR Series Dual 2-ohm Subwoofer

• Peak Power: 1000 watts
• RMS Power: 250-500 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• Santoprene Rubber Surround
• Mount depth: 5-3/4"
• Sensitivity: 86.9 dB

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List price $209.99

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NVX YSW152

1600W Peak (800W RMS) 15" Y-Series Dual 2-ohm Car Subwoofer

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NVX YSW152

1600W Peak (800W RMS) 15" Y-Series Dual 2-ohm Car Subwoofer

• Peak Power: 1600 watts
• RMS Power: 800 watts
• Impedance: Dual 2 ohm
• Enhanced Pressed Paper Cone
• High Roll Foam Surround
• Mount depth: 7.47"
• Sensitivity: 85 dB

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List price $167.99

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Kicker L7S102 (44L7S102)

1200W Peak (600W RMS) 10” Solo-Baric L7S Series Dual 2-ohm Subwoofer

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Kicker L7S102 (44L7S102)

1200W Peak (600W RMS) 10” Solo-Baric L7S Series Dual 2-ohm Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 2 ohm
• Injection Molded Polypropylene Cone
• Santoprene Rubber Surround
• Mount depth: 6-1/4"
• Sensitivity: 85.87 dB

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List price $329.99

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Sundown Audio M-15 D2 15" (M15D2)

4000W Peak (2000W RMS) 15" M Series Dual 2-ohm Car Subwoofer (SW-M15D2)

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Sundown Audio M-15 D2 15" (M15D2)

4000W Peak (2000W RMS) 15" M Series Dual 2-ohm Car Subwoofer (SW-M15D2)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• High Roll Foam Surround
• Mount depth: 12.06"
• Sensitivity: 83.30 dB

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Deaf Bonce Apocalypse DB-SA305 D2

4000W Peak (2000W RMS) 15” Apocalypse Series Dual 2-ohm Car Subwoofer

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Deaf Bonce Apocalypse DB-SA305 D2

4000W Peak (2000W RMS) 15” Apocalypse Series Dual 2-ohm Car Subwoofer

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Pressed Paper Cone
• Foam Surround
• Impedance: Dual 2 ohm
• Mount depth: 7.85"
• Sensitivity: 88.60 dB

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NVX XCW121

4000W Peak (2000W RMS) 12" X-Series Dual 1-ohm SPL Subwoofer

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NVX XCW121

4000W Peak (2000W RMS) 12" X-Series Dual 1-ohm SPL Subwoofer

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 1 ohm
• Enhanced Woven Fiber Paper Composite Cone
• Custom High Roll Foam Surround
• 30 mm Xmax (One Way)
• Sensitivity: 85.6 dB

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List price $599.99

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Massive Audio Hippo H84X

1600W Peak (800W RMS) 8" Hippo Series Dual 4-ohm Subwoofer

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Massive Audio Hippo H84X

1600W Peak (800W RMS) 8" Hippo Series Dual 4-ohm Subwoofer

• Peak Power: 1600 watts
• RMS Power: 800 watts
• Impedance: Dual 4 ohm
• Kevlar Fiber-Enforced Non-Pressed Paper Cone
• Tall and narrow Foam Surround
• Mount depth: 5.51"
• Sensitivity: 84 dB

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List price $285.95

-23% $219.99

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Sundown Audio PSE-6.5

250W RMS 6.5" Dual 4-ohm Powersports Car Subwoofer

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Sundown Audio PSE-6.5

250W RMS 6.5" Dual 4-ohm Powersports Car Subwoofer

• RMS Power: 250 watts
• Impedance: Dual 4 ohm
• Mount depth: 4.5"
• Compatible with powersports applications

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List price $179.99

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Massive Audio GTR84

800W Peak (600W RMS) 8" GTR Series Dual 4-ohm Subwoofer

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Massive Audio GTR84

800W Peak (600W RMS) 8" GTR Series Dual 4-ohm Subwoofer

• Peak Power: 800 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Textured Non-Pressed Pulp with Resin Cone
• High Roll Foam Surround
• Mount depth:
• Sensitivity: 82.5 dB

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List price $179.95

-28% $129.99

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Kicker L7S84 (44L7S84)

900W Peak (450W RMS) 8” Solo-Baric L7S Series Dual 4-ohm Subwoofer

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Kicker L7S84 (44L7S84)

900W Peak (450W RMS) 8” Solo-Baric L7S Series Dual 4-ohm Subwoofer

• Peak Power: 900 watts
• RMS Power: 450 watts
• Impedance: Dual 4 ohm
• Injection Molded Polypropylene Cone
• Ribbed Santoprene Surround
• Mount depth: 4-3/4"
• Sensitivity: 82.37 dB

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2026-06-28 23:59:00

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Alpine W10S4

750W Peak (250W RMS) 10" Bass Series Single 4-ohm Car Subwoofer

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Alpine W10S4

750W Peak (250W RMS) 10" Bass Series Single 4-ohm Car Subwoofer

• Peak Power: 750 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Mica Injected Polypropylene - MIPP Cone
• Poly-Foam Surround
• Mount depth: 5-1/16"
• Sensitivity: 86.6 dB

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List price $130.00

-15% $109.95

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Kicker CWR102 (48CWR102)

800W Peak (400W RMS) 10” CompR Series Dual 2-ohm Subwoofer

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Kicker CWR102 (48CWR102)

800W Peak (400W RMS) 10” CompR Series Dual 2-ohm Subwoofer

• Peak Power: 800 watts
• RMS Power: 200-400 watts
• Impedance: Dual 2 ohm
• Injection Molded Polypropylene cone
• Santoprene Rubber surround
• Mount depth: 5-1/4"
• Sensitivity: 84.6 dB

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2026-06-28 23:59:00

List price $189.99

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FAQ for Universal Subwoofers in 1998 A4 Quattro

Q: Can I upgrade or change the Universal Subwoofers in 1998 Audi A4 Quattro?

A: Yes this page includes all the best Universal Subwoofers that work in your A4 Quattro.

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Universal Subwoofers for 1998 Audi A4 Quattro

Massive Audio UFO10V2

Massive Audio UFO10V2

Rockford Fosgate Power T2 T2S2-16

Rockford Fosgate Power T2 T2S2-16

Massive Audio SUMMOXL104

Massive Audio SUMMOXL104

Sundown Audio M-10 D2 10" (M10D2)

Sundown Audio M-10 D2 10" (M10D2)

Kicker CompC CWCS124 (44CWCS124) (Open Box, Great)

Kicker CompC CWCS124 (44CWCS124) (Open Box, Great)

Kicker CWR82 (48CWR82)

Kicker CWR82 (48CWR82)

Soundstream T5.122

Soundstream T5.122

2) Rockford Fosgate R2 R2SD4-10

2) Rockford Fosgate R2 R2SD4-10

Kicker CWR122 (48CWR122)

Kicker CWR122 (48CWR122)

NVX YSW152

NVX YSW152

Kicker L7S102 (44L7S102)

Kicker L7S102 (44L7S102)

Sundown Audio M-15 D2 15" (M15D2)

Sundown Audio M-15 D2 15" (M15D2)

Deaf Bonce Apocalypse DB-SA305 D2

Deaf Bonce Apocalypse DB-SA305 D2

NVX XCW121

NVX XCW121

Massive Audio Hippo H84X

Massive Audio Hippo H84X

Sundown Audio PSE-6.5

Sundown Audio PSE-6.5

Massive Audio GTR84

Massive Audio GTR84

Kicker L7S84 (44L7S84)

Kicker L7S84 (44L7S84)

Alpine W10S4

Alpine W10S4

Kicker CWR102 (48CWR102)

Kicker CWR102 (48CWR102)

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