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 (263)

400–799.99 watts (415)

800–1,199.99 watts (154)

1,200–1,999.99 watts (72)

2,000 watts or more (202)

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 (55)

500–799.99 watts (163)

800–1,199.99 watts (189)

1,200–1,599.99 watts (178)

1,600–2,399.99 watts (174)

2,400 watts or more (259)

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.

Apocalypse Series (21)

W7 Anniversary Edition Series (12)

Prime Series (11)

R2 Series (11)

Solo-Baric L7T Series (11)

Punch P3 Series (10)

Reference Series (10)

Solo-Baric L7S Series (10)

TW3 Shallow Mount Series (9)

Diamond Elite Series (8)

Hippo Series (8)

Level 4 Series (8)

Mille Pro Series (8)

Nightshade (NS) Series (8)

SA Classic Series (8)

W1 v3 Series (8)

XL Series (8)

ZXI Series (8)

Hifonics Elite Series (7)

Hooligan Series (7)

IXS Shallow Series (7)

Level 3 Series (7)

Level 6 Series (7)

SML Series (7)

Solo-Baric L7R 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)

Mille Legend Series (2)

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 (920)

Yes (205)

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) (876)

Single (1 voice coil) (266)

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 (1,086)

Square (61)

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 (247)

1–1.99 cubic feet (105)

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 (85)

1–1.99 cubic feet (140)

2 cubic feet or more (125)

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 (1,044)

Sealed (859)

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

Brand New (994)

Like New & Used (156)

Availability

In Stock (872)

Out of stock (131)

In stock. Ships from manufacturer (147)

Available to order (104)

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JL Audio 12TW1-4

300W RMS 12" TW1 Series Single 4-ohm Shallow Subwoofer

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JL Audio 12TW1-4

300W RMS 12" TW1 Series Single 4-ohm Shallow Subwoofer

• RMS Power: 300 watts
• Impedance: Single 4 ohm
• Mica Injected Polypropylene - MIPP Cone
• Rubber Surround
• Mount depth: 4.62"
• Sensitivity: 85.15 dB

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Polk Audio MM842 SVC (MM842SVC)

900W Peak (300W RMS) 8" MM1 Series SIngle 4-ohm Car Subwoofer

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Polk Audio MM842 SVC (MM842SVC)

900W Peak (300W RMS) 8" MM1 Series SIngle 4-ohm Car Subwoofer

• Peak Power: 900 watts
• RMS Power: 300 watts
• Impedance: Single 4 ohm
• Composite Polypropylene Cone - CPPC
• Santoprene Rubber surround
• Mount depth: 4"
• Sensitivity: 85 dB

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Sundown Audio U-15 v.2 D4 15" (U15V2D4)

4000W Peak (2000W RMS) 15" U Series Dual 4-ohm Car Subwoofer (SW-UV215D4)

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Sundown Audio U-15 v.2 D4 15" (U15V2D4)

4000W Peak (2000W RMS) 15" U Series Dual 4-ohm Car Subwoofer (SW-UV215D4)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 4 ohm
• Pressed Paper Cone
• Double-Stitched Surround
• Mount depth: 9"
• Sensitivity: 87.31 dB

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Pioneer TS-A301D4

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

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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

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American Bass VFL 8" (VFL-844)

1200W Peak (600W RMS) 8" VFL Series Dual 4-ohm Subwoofer

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American Bass VFL 8" (VFL-844)

1200W Peak (600W RMS) 8" VFL Series Dual 4-ohm Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Kevlar Fiber-Enforced Non-Pressed Paper cone
• High Roll Foam surround
• Mount depth: 5.43"
• Sensitivity: 80.5 dB

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List price $272.84

-39% $166.32

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DC Audio Level 3 12M4D4 (M4LV312D4)

2000W Peak (1000W RMS) 12" Level 3 Series M4 Version Dual 4-ohm Subwoofer

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DC Audio Level 3 12M4D4 (M4LV312D4)

2000W Peak (1000W RMS) 12" Level 3 Series M4 Version Dual 4-ohm Subwoofer

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 4 ohm
• Non-Pressed Paper Cone
• Multi-layered Polymer Foam Surround
• Mount depth: 6.75"
• Sensitivity: 82.97 dB

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DC Audio Level 5 18M4D1.4 (M4LV518D1.4)

7000W Peak (3500W RMS) 18" Level 5 Series M4 Version Dual 1.4-ohm Car Subwoofer

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DC Audio Level 5 18M4D1.4 (M4LV518D1.4)

7000W Peak (3500W RMS) 18" Level 5 Series M4 Version Dual 1.4-ohm Car Subwoofer

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1.4 ohm
• Kraft Pulp cone
• Wide Foam surround
• Mount depth: 12.75"

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List price $1539.99

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Sundown Audio NS v.6 D1 12" (NSV612D1)

7000W Peak (3500W RMS) 12" Nightshade Series Dual 1-ohm Car Subwoofer (SW-NSV612D1)

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Sundown Audio NS v.6 D1 12" (NSV612D1)

7000W Peak (3500W RMS) 12" Nightshade Series Dual 1-ohm Car Subwoofer (SW-NSV612D1)

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Polypropylene Cone
• Mega Roll V2 Surround
• Sensitivity: 83.02 dB

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-18% $1,029.99

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Rockford Fosgate Power T3S1-19 (Open Box, Great)

6000W Peak (3000W RMS) 19" Power Series Single 1-ohm Super Car Subwoofer

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Rockford Fosgate Power T3S1-19 (Open Box, Great)

6000W Peak (3000W RMS) 19" Power Series Single 1-ohm Super Car Subwoofer

• Peak Power: 6000 watts
• RMS Power: 3000 watts
• Impedance: Single 1 ohm
• Glass Fiber Cone
• Injection molded foam Surround
• Mount depth: 15.62"
• Sensitivity: 91 dB

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• Peak Power: 6000 watts
• RMS Power: 3000 watts
• Impedance: Single 1 ohm
• Glass Fiber Cone
• Injection molded foam Surround
• Mount depth: 15.62"
• Sensitivity: 91 dB

Earthquake Sound TNT-10S

1000W Peak 10" TNT Series Single 4-ohm Car Subwoofer

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Earthquake Sound TNT-10S

1000W Peak 10" TNT Series Single 4-ohm Car Subwoofer

• 1000W Peak
• 300W RMS
• Polypropylene Cone Body
• High Roll Surround
• Spring Loaded Terminals
• Triple Voice Coil Vents

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DC Audio XL18 M4 D2 (M4XL18D2)

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

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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

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List price $845.99

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Alpine S2-W10D2

1800W Peak (600W RMS) 10" S-Series Dual 2-ohm Car Subwoofer

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Alpine S2-W10D2

1800W Peak (600W RMS) 10" S-Series Dual 2-ohm Car Subwoofer

• Peak Power: 1800 watts
• RMS Power: 600 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Polypropylene Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 4.54"
• Sensitivity: 84.7 dB

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2026-07-15 23:59:00

List price $290.00

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-34% $191.95

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DS18 Hooligan X 12" (HOOL-X12.1DHE)

6000W Peak (4000W RMS) 12" Hooligan Series Dual 1-ohm Car Subwoofer

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DS18 Hooligan X 12" (HOOL-X12.1DHE)

6000W Peak (4000W RMS) 12" Hooligan Series Dual 1-ohm Car Subwoofer

• Peak Power: 6000 watts
• RMS Power: 4000 watts
• Impedance: Dual 1 ohm
• Non-Pressed Paper cone
• Foam surround
• Mount depth: 10"
• Sensitivity: 87 dB

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DC Audio Level 3 18M2D2 (M2LV318D2)

2000W Peak (1000W RMS) 18" Level 3 Series M2 Version Dual 2-Ohm Car Subwoofer

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DC Audio Level 3 18M2D2 (M2LV318D2)

2000W Peak (1000W RMS) 18" Level 3 Series M2 Version Dual 2-Ohm Car Subwoofer

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 2 ohm
• Non-Pressed Paper cone
• Multi-layered Polymer Foam surround
• Mount depth: 9.5"
• Sensitivity: 90.4 dB

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List price $653.38

-33% $439.99

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Hertz MP 250 D2.3

1200W Peak (600W RMS) 10" Mille Pro Series Dual 2-ohm Car Subwoofer

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Hertz MP 250 D2.3

1200W Peak (600W RMS) 10" Mille Pro Series Dual 2-ohm Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 2 ohm
• Pressed Pulp Fiber cone
• Butyl Rubber surround
• Mount depth: 5.55"
• Sensitivity: 83.5 dB

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$549.99

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Sundown Audio SA-18 v.2 D2 18" (SA18V2D2)

2500W Peak (1250W RMS) 18" SA Series Dual 2-ohm Car Subwoofer (SW-SAV218D2)

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Sundown Audio SA-18 v.2 D2 18" (SA18V2D2)

2500W Peak (1250W RMS) 18" SA Series Dual 2-ohm Car Subwoofer (SW-SAV218D2)

• Peak Power: 2500 watts
• RMS Power: 1250 watts
• Impedance: Dual 2 ohm
• Competition Grade Paper cone
• Foam surround
• Mount depth: 10.125"
• Sensitivity: 90.1 dB

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-17% $499.99

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Cerwin Vega V84DV2

750W Peak (250W RMS) 8" Vega Series Dual 4-ohm Subwoofer

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Cerwin Vega V84DV2

750W Peak (250W RMS) 8" Vega Series Dual 4-ohm Subwoofer

• Peak Power: 750 watts
• RMS Power: 250 watts
• Impedance: Dual 4 ohm
• Carbon Fiber Polypropylene cone
• Santoprene Rubber surround
• Mount depth: 4.4"
• Sensitivity: 81.5 dB

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List price $119.99

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American Bass DX-104

600W Peak (300W RMS) 10" DX Series Single 4-ohm Subwoofer

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American Bass DX-104

600W Peak (300W RMS) 10" DX Series Single 4-ohm Subwoofer

• Peak Power: 600 watts
• RMS Power: 300 watts
• Impedance: Single 4 ohm
• Non-Pressed Paper Cone
• Oversized 3-layer Foam Surround
• Mount depth: 5.1"
• Sensitivity: 86.2 dB

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List price $113.63

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Pioneer TS-A25S4

1200W Peak (300W RMS) 10" A-Series Single 4-ohm Car Subwoofer

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Pioneer TS-A25S4

1200W Peak (300W RMS) 10" A-Series Single 4-ohm Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 350 watts
• Interlaced Carbon-Glass Fiber Composite - IMPP Cone
• Rubber Surround
• Impedance: Single 4 ohm
• Mount depth: 5"
• Sensitivity: 85 dB

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List price $95.00

-16% $79.99

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Sundown Audio U-18 v.2 D4 18" (U18V2D4)

4000W Peak (2000W RMS) 18" U Series Dual 4-ohm Car Subwoofer (SW-UV218D4)

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Sundown Audio U-18 v.2 D4 18" (U18V2D4)

4000W Peak (2000W RMS) 18" U Series Dual 4-ohm Car Subwoofer (SW-UV218D4)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 4 ohm
• Pressed Paper Cone
• Double-Stitched Surround
• Mount depth: 10"
• Sensitivity: 88.87 dB

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List price $863.99

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FAQ for Universal Subwoofers in 2004 Forenza

Q: Can I upgrade or change the Universal Subwoofers in 2004 Suzuki Forenza?

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

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Universal Subwoofers for 2004 Suzuki Forenza

JL Audio 12TW1-4

JL Audio 12TW1-4

Polk Audio MM842 SVC (MM842SVC)

Polk Audio MM842 SVC (MM842SVC)

Sundown Audio U-15 v.2 D4 15" (U15V2D4)

Sundown Audio U-15 v.2 D4 15" (U15V2D4)

Pioneer TS-A301D4

Pioneer TS-A301D4

American Bass VFL 8" (VFL-844)

American Bass VFL 8" (VFL-844)

DC Audio Level 3 12M4D4 (M4LV312D4)

DC Audio Level 3 12M4D4 (M4LV312D4)

DC Audio Level 5 18M4D1.4 (M4LV518D1.4)

DC Audio Level 5 18M4D1.4 (M4LV518D1.4)

Sundown Audio NS v.6 D1 12" (NSV612D1)

Sundown Audio NS v.6 D1 12" (NSV612D1)

Rockford Fosgate Power T3S1-19 (Open Box, Great)

Rockford Fosgate Power T3S1-19 (Open Box, Great)

Earthquake Sound TNT-10S

Earthquake Sound TNT-10S

DC Audio XL18 M4 D2 (M4XL18D2)

DC Audio XL18 M4 D2 (M4XL18D2)

Alpine S2-W10D2

Alpine S2-W10D2

DS18 Hooligan X 12" (HOOL-X12.1DHE)

DS18 Hooligan X 12" (HOOL-X12.1DHE)

DC Audio Level 3 18M2D2 (M2LV318D2)

DC Audio Level 3 18M2D2 (M2LV318D2)

Hertz MP 250 D2.3

Hertz MP 250 D2.3

Sundown Audio SA-18 v.2 D2 18" (SA18V2D2)

Sundown Audio SA-18 v.2 D2 18" (SA18V2D2)

Cerwin Vega V84DV2

Cerwin Vega V84DV2

American Bass DX-104

American Bass DX-104

Pioneer TS-A25S4

Pioneer TS-A25S4

Sundown Audio U-18 v.2 D4 18" (U18V2D4)

Sundown Audio U-18 v.2 D4 18" (U18V2D4)

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