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  3. Alpine Car Audio & Electronics
  4. Alpine Car Subwoofers
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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.
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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Alpine HDZ-SB12

2400W Peak (800W RMS) Loaded Single 12" Sealed Subwoofer Enclosure

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Alpine HDZ-SB12

2400W Peak (800W RMS) Loaded Single 12" Sealed Subwoofer Enclosure

• Sealed enclosure with 1 12" Status Series Subwoofer
• 800 watts RMS (2400 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 15.75" L x 15.75" H x 17.2" W

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List price $1870.00
-17% $1,559.95

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Alpine HDZ-SB10

2400W Peak (800W RMS) Loaded Single 10" Sealed Subwoofer Enclosure

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Alpine HDZ-SB10

2400W Peak (800W RMS) Loaded Single 10" Sealed Subwoofer Enclosure

• Sealed enclosure with 1 10" Status Series Subwoofer
• 800 watts RMS (2400 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 13.75" L x 13.75" H x 16.25" W

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Alpine PWE-S8 8" Amplified Subwoofer with Amplifier Wiring Kit

120W Compact Powered 8" Loaded Subwoofer Enclosure for Under or Behind the Seat

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Alpine PWE-S8 8" Amplified Subwoofer with Amplifier Wiring Kit

120W Compact Powered 8" Loaded Subwoofer Enclosure for Under or Behind the Seat

• Peak: 240 watts
• RMS: 120 watts
• 8" Woofer High-Excursion cone
• Built-in Class D Amplifier
• Frequency Response: 32-150 Hz
• Includes Belva 8 Gauge Amplifier Wiring Kit

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List price $529.99
-34% $349.94

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• Peak: 240 watts
• RMS: 120 watts
• 8" Woofer High-Excursion cone
• Built-in Class D Amplifier
• Frequency Response: 32-150 Hz
• Includes Belva 8 Gauge Amplifier Wiring Kit

Alpine S2-W8D4 (Open Box, Great)

900W Peak (300W RMS) 8" S-Series Dual 4-ohms Car Subwoofer

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Alpine S2-W8D4 (Open Box, Great)

900W Peak (300W RMS) 8" S-Series Dual 4-ohms Car Subwoofer

• Peak Power: 900 watts
• RMS Power: 300 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 3.71"
• Sensitivity: 82.7 dB

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-43% $146.96

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• Peak Power: 900 watts
• RMS Power: 300 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 3.71"
• Sensitivity: 82.7 dB

Alpine S2-W8D2 - Pair

900W Peak (300W RMS) 8" S-Series Dual 2-ohm Car Subwoofer

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Alpine S2-W8D2 - Pair

900W Peak (300W RMS) 8" S-Series Dual 2-ohm Car Subwoofer

• Peak Power: 900 watts
• RMS Power: 300 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Polypropylene Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 3.71"
• Sensitivity: 82.6 dB

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List price $500.00
-33% $335.90

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• Peak Power: 900 watts
• RMS Power: 300 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Polypropylene Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 3.71"
• Sensitivity: 82.6 dB

Alpine S2-W8D4 - Pair

900W Peak (300W RMS) 8" S-Series Dual 4-ohm Car Subwoofer

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Alpine S2-W8D4 - Pair

900W Peak (300W RMS) 8" S-Series Dual 4-ohm Car Subwoofer

• Peak Power: 900 watts
• RMS Power: 300 watts
• Impedance: Dual 4 ohm
• Carbon Fiber Polypropylene Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 3.71"
• Sensitivity: 82.7 dB

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-33% $335.90

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• Peak Power: 900 watts
• RMS Power: 300 watts
• Impedance: Dual 4 ohm
• Carbon Fiber Polypropylene Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 3.71"
• Sensitivity: 82.7 dB

Alpine R2-W12D4 2nd Gen (Pair, Two Subwoofers)

2250W Peak (750W RMS) 12" 750W R-Series Dual 4-Ohm Car Subwoofers

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Alpine R2-W12D4 2nd Gen (Pair, Two Subwoofers)

2250W Peak (750W RMS) 12" 750W R-Series Dual 4-Ohm Car Subwoofers

• Includes Two Subwoofers
• Peak Power: 2250 watts
• RMS Power: 750 watts
• Impedance: Dual 4 ohm
• Kevlar Reinforced Pulp Paper Cone
• High-Amplitude Multi-Roll (H.A.M.R) Surround
• Mount depth: 6.43"
• Sensitivity: 84.6 dB

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-37% $683.90

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• Includes Two Subwoofers
• Peak Power: 2250 watts
• RMS Power: 750 watts
• Impedance: Dual 4 ohm
• Kevlar Reinforced Pulp Paper Cone
• High-Amplitude Multi-Roll (H.A.M.R) Surround
• Mount depth: 6.43"
• Sensitivity: 84.6 dB

Alpine S2-W12D2 - Pair

1800W Peak (600W RMS) 12" S-Series Dual 2-ohm Car Subwoofer

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Alpine S2-W12D2 - Pair

1800W Peak (600W RMS) 12" 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: 4.89"
• Sensitivity: 85.7 dB

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-33% $431.90

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• Peak Power: 1800 watts
• RMS Power: 600 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Polypropylene Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 4.89"
• Sensitivity: 85.7 dB

Alpine R2-W8D4 - Pair

1000W Peak (350W RMS) 8" R2-Series Dual 4-ohm Car Subwoofer

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Alpine R2-W8D4 - Pair

1000W Peak (350W RMS) 8" R2-Series Dual 4-ohm Car Subwoofer

• Peak Power: 1000 watts
• RMS Power: 350 watts
• Impedance: Dual 4 ohm
• Kevlar Reinforced Pulp Paper Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 4.56"
• Sensitivity: 83.7 dB

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List price $720.00
-33% $479.90

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• Peak Power: 1000 watts
• RMS Power: 350 watts
• Impedance: Dual 4 ohm
• Kevlar Reinforced Pulp Paper Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 4.56"
• Sensitivity: 83.7 dB

Alpine R2-W8D2 - Pair

1000W Peak (350W RMS) 8" R2-Series Dual 2-ohm Car Subwoofer

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Alpine R2-W8D2 - Pair

1000W Peak (350W RMS) 8" R2-Series Dual 2-ohm Car Subwoofer

• Peak Power: 1000 watts
• RMS Power: 350 watts
• Impedance: Dual 2 ohm
• Kevlar Reinforced Pulp Paper Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 4.56"
• Sensitivity: 83.6 dB

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List price $720.00
-33% $479.90

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• Peak Power: 1000 watts
• RMS Power: 350 watts
• Impedance: Dual 2 ohm
• Kevlar Reinforced Pulp Paper Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 4.56"
• Sensitivity: 83.6 dB

Alpine SWT-10S2 with Sealed Truck Enclosure

1000W Peak 10" SWT Series Single 2-ohm Shallow Mount Subwoofer

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Alpine SWT-10S2 with Sealed Truck Enclosure

1000W Peak 10" SWT Series Single 2-ohm Shallow Mount Subwoofer

• Peak Power: 1000W
• RMS Power: 350W
• Poly-Mica Dust Cap & Pulp-Kevlar
• Polyurethane Foam Surround w/ H.A.M.R. Surround Technology
• Includes Sealed Truck Enclosure

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List price $399.99
-24% $305.44

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Alpine R2-W12D2 with Sealed Enclosure

2250W Peak (750W RMS) 12" R-Series Dual 2-Ohm Car Subwoofer

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Alpine R2-W12D2 with Sealed Enclosure

2250W Peak (750W RMS) 12" R-Series Dual 2-Ohm Car Subwoofer

• Peak Power: 2250 watts
• RMS Power: 750 watts
• Kevlar Reinforced Pulp Paper Cone
• High-Amplitude Multi-Roll (H.A.M.R) Surround
• Impedance: Dual 2 ohm
• Sensitivity: 85 dB
• Includes Sealed Enclosure

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List price $609.99
-41% $359.95

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Alpine S2-W12D4 - Pair

1800W Peak (600W RMS) 12" S-Series Dual 4-ohm Car Subwoofer

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Alpine S2-W12D4 - Pair

1800W Peak (600W RMS) 12" S-Series Dual 4-ohm Car Subwoofer

• Peak Power: 1800 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Carbon Fiber Polypropylene Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 4.89"
• Sensitivity: 86.2 dB

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List price $640.00
-33% $431.90

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• Peak Power: 1800 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Carbon Fiber Polypropylene Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 4.89"
• Sensitivity: 86.2 dB

Alpine RS-W10D4 with Sealed Enclosure

1200W Peak (600W RMS) 10” R-Series Dual 4-Ohms Shallow Subwoofer

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Alpine RS-W10D4 with Sealed Enclosure

1200W Peak (600W RMS) 10” R-Series Dual 4-Ohms Shallow Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Polypropylene with aluminum dust cap Cone
• Butyl Rubber Surround
• Impedance: Dual 4 ohm
• Sensitivity: 83 dB
• Includes Sealed truck Enclosure

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List price $939.99
-26% $699.95

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Alpine S2-SB10V Package

Two 600W 10” Loaded Subwoofer Enclosures with Linking Kit + 1200W Class-D Monoblock Amplifier with Bass Knob

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Alpine S2-SB10V Package

Two 600W 10” Loaded Subwoofer Enclosures with Linking Kit + 1200W Class-D Monoblock Amplifier with Bass Knob

• Includes preloaded Alpine S-W10D4 10” subwoofer
• Ported enclosure with 2 10" S Series Subwoofer
• 600 watts RMS (1800 watts Peak)
• Final Impedance: 2-ohm
• USA Designed for sound quality performance

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-21% $1,571.99

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• Includes preloaded Alpine S-W10D4 10” subwoofer
• Ported enclosure with 2 10" S Series Subwoofer
• 600 watts RMS (1800 watts Peak)
• Final Impedance: 2-ohm
• USA Designed for sound quality performance

Alpine R2-W12D2 - Pair

2250W Peak (750W RMS) 12" R2-Series Dual 2-ohm Car Subwoofer

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Alpine R2-W12D2 - Pair

2250W Peak (750W RMS) 12" R2-Series Dual 2-ohm Car Subwoofer

• Peak Power: 2250 watts
• RMS Power: 750 watts
• Impedance: Dual 2 ohm
• Kevlar Reinforced Pulp Paper Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 6.43"
• Sensitivity: 85 dB

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List price $1080.00
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• Peak Power: 2250 watts
• RMS Power: 750 watts
• Impedance: Dual 2 ohm
• Kevlar Reinforced Pulp Paper Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 6.43"
• Sensitivity: 85 dB

Alpine R2-W10D2 - Pair

2250W Peak (750W RMS) 10" R2-Series Dual 2-ohm Car Subwoofer

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Alpine R2-W10D2 - Pair

2250W Peak (750W RMS) 10" R2-Series Dual 2-ohm Car Subwoofer

• Peak Power: 2250 watts
• RMS Power: 750 watts
• Impedance: Dual 2 ohm
• Kevlar Reinforced Pulp Paper Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 5.92"
• Sensitivity: 82.3 dB

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List price $960.00
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• Peak Power: 2250 watts
• RMS Power: 750 watts
• Impedance: Dual 2 ohm
• Kevlar Reinforced Pulp Paper Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 5.92"
• Sensitivity: 82.3 dB

Alpine RS-W10D2 with Sealed Truck Enclosure

1200W Peak (600W RMS) 10” R-Series Dual 2-Ohms Shallow Subwoofer

RS-W10D2, 10TK big
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Alpine RS-W10D2 with Sealed Truck Enclosure

1200W Peak (600W RMS) 10” R-Series Dual 2-Ohms Shallow Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Polypropylene with aluminum dust cap Cone
• Butyl Rubber Surround
• Impedance: Dual 2 ohm
• Sensitivity: 83 dB
• Includes Sealed Truck Enclosure

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List price $939.99
-26% $699.95

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Alpine S2-W10D4 - Pair

1800W Peak (600W RMS) 10" S-Series Dual 4-ohm Car Subwoofer

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Alpine S2-W10D4 - Pair

1800W Peak (600W RMS) 10" S-Series Dual 4-ohm Car Subwoofer

• Peak Power: 1800 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Carbon Fiber Polypropylene Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 4.54"
• Sensitivity: 84.9 dB

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• Peak Power: 1800 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Carbon Fiber Polypropylene Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 4.54"
• Sensitivity: 84.9 dB

(2) Alpine W12S4 with Sealed Dual Enclosure

750W Max (250W RMS) 12" BassLine Series Single 4 ohm Car Subwoofer

MDFD12, W12S4, W12S4 big
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(2) Alpine W12S4 with Sealed Dual Enclosure

750W Max (250W RMS) 12" BassLine Series Single 4 ohm Car Subwoofer

• 750W Max
• 250W RMS
• Polypropylene-Mica cone
• High-excursion poly-foam surround
• High-strength custom steel frame
• Progressive Wavelit Ribs (P.W.R.) cone design
• Includes Sealed Dual Enclosure

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