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.

1,200–1,999.99 watts (2)

2,000 watts or more (14)

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.

2,400 watts or more (16)

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.

Z Series (4)

M Series (3)

Nightshade (NS) Series (3)

SA Series (2)

U Series (2)

X Series (2)

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 (16)

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.

7" or more (14)

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) (16)

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.

2 (8)

1 (6)

4 (2)

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 (16)

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".

85–89.99 dB (12)

90–94.99 dB (4)

Main Cone Color

This is the color of the speaker's or subwoofer's cone.

Black (16)

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 (2)

Ported / Vented (16)

Sealed (4)

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.

15 mm or more (16)

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Sundown Audio X-18 v.3 D1 18" (X12V3D1)

5000W Peak (2500W RMS) 18" X Series Dual 1-ohm Car Subwoofer (SW-XV318D1)

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Sundown Audio X-18 v.3 D1 18" (X12V3D1)

5000W Peak (2500W RMS) 18" X Series Dual 1-ohm Car Subwoofer (SW-XV318D1)

• Peak Power: 5000 watts
• RMS Power: 2500 watts
• Impedance: Dual 1 ohm
• Pressed Paper Cone
• Mega Roll V2 Surround
• Mount depth: 13.6"
• Sensitivity: 88.6 dB

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Sundown Audio NS v.6 D1 18" (NSV618D1) (Open Box, Great)

7000W Peak (3500W RMS) 18" Nightshade Series Dual 1-ohm Car Subwoofer (SW-NSV618D1)

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Sundown Audio NS v.6 D1 18" (NSV618D1) (Open Box, Great)

7000W Peak (3500W RMS) 18" Nightshade Series Dual 1-ohm Car Subwoofer (SW-NSV618D1)

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Polypropylene Cone
• Mega Roll V2 Surround
• Sensitivity: 87.47 dB

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• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Polypropylene Cone
• Mega Roll V2 Surround
• Sensitivity: 87.47 dB

Sundown Audio X-18 v.3 D2 18" (X12V3D2)

5000W Peak (2500W RMS) 18" X Series Dual 2-ohm Car Subwoofer (SW-XV318D2)

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Sundown Audio X-18 v.3 D2 18" (X12V3D2)

5000W Peak (2500W RMS) 18" X Series Dual 2-ohm Car Subwoofer (SW-XV318D2)

• Peak Power: 5000 watts
• RMS Power: 2500 watts
• Impedance: Dual 2 ohm
• Pressed Paper Cone
• Mega Roll V2 Surround
• Mount depth: 13.6"
• Sensitivity: 87.6 dB

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Sundown Audio Z-18 v.7 D2 18" (Z18V7D2)

7000W Peak (3500W RMS) 18" Z Series Dual 2-ohm Car Subwoofer (SW-ZV718D2)

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Sundown Audio Z-18 v.7 D2 18" (Z18V7D2)

7000W Peak (3500W RMS) 18" Z Series Dual 2-ohm Car Subwoofer (SW-ZV718D2)

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 2 ohm
• Treated Paper Cone
• Treated Foam Surround
• Sensitivity: 91.07 dB

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Sundown Audio M-18 D1 18" (M18D1)

4000W Peak (2000W RMS) 18" M Series Dual 1-ohm Car Subwoofer (SW-M18D1)

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Sundown Audio M-18 D1 18" (M18D1)

4000W Peak (2000W RMS) 18" M Series Dual 1-ohm Car Subwoofer (SW-M18D1)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 1 ohm
• Polypropylene Cone
• High Roll Foam Surround
• Mount depth: 14.05"
• Sensitivity: 85.83 dB

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Sundown Audio M-18 D2 18" (M18D2)

4000W Peak (2000W RMS) 18" M Series Dual 2-ohm Car Subwoofer (SW-M18D2)

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Sundown Audio M-18 D2 18" (M18D2)

4000W Peak (2000W RMS) 18" M Series Dual 2-ohm Car Subwoofer (SW-M18D2)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Treated Paper Cone
• Mega Roll V2 Surround
• Mount depth: 14.05"
• Sensitivity: 86.10 dB

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Sundown Audio NS v.6 D1 18" (NSV618D1)

7000W Peak (3500W RMS) 18" Nightshade Series Dual 1-ohm Car Subwoofer (SW-NSV618D1)

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Sundown Audio NS v.6 D1 18" (NSV618D1)

7000W Peak (3500W RMS) 18" Nightshade Series Dual 1-ohm Car Subwoofer (SW-NSV618D1)

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Polypropylene Cone
• Mega Roll V2 Surround
• Sensitivity: 87.47 dB

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

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

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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

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Sundown Audio Z-18 v.6 D1 18" (Z18V6D1)

6500W Peak (3250W RMS) 18" Z Series Dual 1-ohm Car Subwoofer (SW-ZV618D1)

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Sundown Audio Z-18 v.6 D1 18" (Z18V6D1)

6500W Peak (3250W RMS) 18" Z Series Dual 1-ohm Car Subwoofer (SW-ZV618D1)

• Peak Power: 6500 watts
• RMS Power: 3250 watts
• Impedance: Dual 1 ohm
• Treated Paper Cone
• Mega Roll V2 Surround
• Mount depth: 14.92"
• Sensitivity: 87.51 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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Sundown Audio U-18 v.2 D2 18" (U18V2D2)

4000W Peak (2000W RMS) 18" U Series Dual 2-ohm Car Subwoofer (SW-UV218D2)

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Sundown Audio U-18 v.2 D2 18" (U18V2D2)

4000W Peak (2000W RMS) 18" U Series Dual 2-ohm Car Subwoofer (SW-UV218D2)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Pressed Paper Cone
• Double-Stitched Surround
• Mount depth: 10"
• Sensitivity: 89.41 dB

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Sundown Audio Z-18 v.6 D2 18" (Z18V6D2)

6500W Peak (3250W RMS) 18" Z Series Dual 2-ohm Car Subwoofer (SW-ZV618D2)

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Sundown Audio Z-18 v.6 D2 18" (Z18V6D2)

6500W Peak (3250W RMS) 18" Z Series Dual 2-ohm Car Subwoofer (SW-ZV618D2)

• Peak Power: 6500 watts
• RMS Power: 3250 watts
• Impedance: Dual 2 ohm
• Treated Paper Cone
• Mega Roll V2 Surround
• Mount depth: 14.92"
• Sensitivity: 87.58 dB

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Sundown Audio M-18 D2 18" (M18D2)

4000W Peak (2000W RMS) 18" M Series Dual 2-ohm Car Subwoofer (SW-MD18D2)

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Sundown Audio M-18 D2 18" (M18D2)

4000W Peak (2000W RMS) 18" M Series Dual 2-ohm Car Subwoofer (SW-MD18D2)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• High Roll Foam Surround
• Mount depth: 14.05"
• Sensitivity: 86.102 dB

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List price $719.99

$699.99

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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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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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List price $599.99

-17% $499.99

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Sundown Audio Z-18 v.7 D1 18" (Z18V7D1)

7000W Peak (3500W RMS) 18" Z Series V7 Dual 1-ohm Car Subwoofer (SW-ZV718D1)

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Sundown Audio Z-18 v.7 D1 18" (Z18V7D1)

7000W Peak (3500W RMS) 18" Z Series V7 Dual 1-ohm Car Subwoofer (SW-ZV718D1)

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Treated Paper Cone
• Treated Foam Surround
• Sensitivity: 92.111 dB

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• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Treated Paper Cone
• Treated Foam Surround
• Sensitivity: 92.111 dB

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Sundown Audio 18" Car Subwoofers

Shop the Category

Sundown Audio X-18 v.3 D1 18" (X12V3D1)

Sundown Audio X-18 v.3 D1 18" (X12V3D1)

Sundown Audio NS v.6 D1 18" (NSV618D1) (Open Box, Great)

Sundown Audio NS v.6 D1 18" (NSV618D1) (Open Box, Great)

Sundown Audio X-18 v.3 D2 18" (X12V3D2)

Sundown Audio X-18 v.3 D2 18" (X12V3D2)

Sundown Audio Z-18 v.7 D2 18" (Z18V7D2)

Sundown Audio Z-18 v.7 D2 18" (Z18V7D2)

Sundown Audio M-18 D1 18" (M18D1)

Sundown Audio M-18 D1 18" (M18D1)

Sundown Audio M-18 D2 18" (M18D2)

Sundown Audio M-18 D2 18" (M18D2)

Sundown Audio NS v.6 D1 18" (NSV618D1)

Sundown Audio NS v.6 D1 18" (NSV618D1)

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

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

Sundown Audio Z-18 v.6 D1 18" (Z18V6D1)

Sundown Audio Z-18 v.6 D1 18" (Z18V6D1)

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

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

Sundown Audio U-18 v.2 D2 18" (U18V2D2)

Sundown Audio U-18 v.2 D2 18" (U18V2D2)

Sundown Audio Z-18 v.6 D2 18" (Z18V6D2)

Sundown Audio Z-18 v.6 D2 18" (Z18V6D2)

Sundown Audio M-18 D2 18" (M18D2)

Sundown Audio M-18 D2 18" (M18D2)

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

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

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

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

Sundown Audio Z-18 v.7 D1 18" (Z18V7D1)

Sundown Audio Z-18 v.7 D1 18" (Z18V7D1)

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