Alpine RS-SB12 R-Series sealed enclosure with 12" 2-ohm shallow-mount subwoofer

Name: Alpine RS-SB12
Brand: Alpine
SKU: 500RSSB12
Price: 999.95 USD
Availability: InStock
Rating: 5.0 (7 reviews)

Item # 500RSSB12

This versatile box gives you Alpine quality in a box that'll fit in smaller spaces.

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This versatile box gives you Alpine quality in a box that'll fit in smaller spaces.

Item # 500RSSB12

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Shallow-mount option

Alpine's R-Series of subwoofer enclosures deliver sound and style in preloaded sub boxes. Now the RS-SB12 12” subwoofer joins their lineup of space-saving shallow-mount solutions.

The little sub that could

The enclosure contains an RS-W12D2 subwoofer dual-voice coil subwoofer wired to provide a 2-ohm load. This shallow sub features a cast aluminum frame, polypropylene cone, and butyl rubber surround, and handles up to 600 watts RMS (1800 watts peak) so you'll get the big bass you're looking for.

Built road tough

The rugged medium-density fiberboard enclosure is only 5.38” tall, and is covered in tough and attractive black carpet. The included rubber feet can be installed on the top or bottom, so the enclosure can be installed as a downward- or upward-firing enclosure for maximum flexibility. A steel mesh grille protects your speaker from accidental damage.

Product highlights:

sealed enclosure with one 12" subwoofer — can be used as upward- or downward-firing enclosure
3/4" medium-density fiberboard construction covered with carpet
2-ohm total impedance
frequency range: 26-200 Hz
power handling: 600 watts RMS (1800 watts peak power)
sensitivity: 81 dB
steel mesh grille included
dimensions: 26.63"W x 5.38"H x 17.13"D (without feet)
warranty: 1 year
MFR # RS-SB12
Item # 500RSSB12

What's in the box:

Alpine RS-SB12 owner's manual

Subwoofer enclosure loaded with one RS-W12D4 12" subwoofer
8 Rubber feet
4 Plastic spacers
Eight M5x15mm screws (installed)
Four M5x25mm screws
Four M5x45mm screws
4 Flat-washers
Installation guide
Parts list
Warranty information
Registration information
Important notice

Researched by Crutchfield's Pat M.

Features & specs

General
Woofer Size (inches)	12
Speakers Per Box	1
Woofer Material	Kevlar reinforced pulp
Enclosure Type	Sealed
Color	Black
Pieces in System	1
Width (inches)	26-11/16
Height (inches)	5-7/16
Depth (inches)	17-3/16
Connector Type	Spring post
Frequency Response	26-200 Hz
Power Handling (Watts RMS)	600
Power Handling (Watts Peak)	1800
Sensitivity	81 dB
Impedance	2 ohms
Parts Warranty	1 Year
Labor Warranty	1 Year

Product Research

Features

Overview: The Alpine RS-SB12 subwoofer enclosure features a single Alpine R-Series Shallow-Mount subwoofer mounted in an ultra-compact enclosure. This combination provides deep, clear bass while taking up minimal space in your vehicle.

Enclosure: The sealed enclosure is made of heavy-duty MDF (Medium Density Fiberboard), providing exceptional acoustic efficiency and deep powerful bass. The enclosure is covered in sleek black carpeting with the Alpine logo embroidered in white on one side for a refined look and added protection.

Mounting: The RS-SB12 subwoofer enclosure includes rubber feet for installation in each corner of the enclosure. Eight rubber feet and four spacers let you vary the mounting height and allow for placing the enclosure on uneven surfaces. A single rubber foot can be installed, providing 1/2" of mounting height. If two feet and a spacer are used, the enclosure will sit 1-1/4" above the mounting surface. The RS-SB12 is optimized for mounting in a down-firing orientation, but includes mounting holes on both sides of the enclosure, allowing for up-firing foot placement as well.

Note: The embroidered Alpine logo will be upside-down if the enclosure is mounted in the up-firing position.

Speaker Terminals: A single pair of spring-posts are mounted on one side of the enclosure in a recessed terminal cup, accepting pin connectors, single banana plugs, or bare wire up to 10-gauge. The subwoofer's dual 4Ω voice coils are internally wired to present a 2Ω load at the spring posts.

Power: The Alpine RS-SB12 enclosed subwoofer can handle 600W RMS (1800W peak).

Dual Voice-Coil Driver: The pre-installed Alpine RS-W12D4 features the same motor movement (20mm of 1-way excursion) as the full-size R2-Series subwoofers, providing extreme output in a shallow woofer design. A powerful neodymium magnet and 4" voice coil allow for up to 600W RMS of output, while Alpine's Gen2 DD-Linear Magnetic Circuit technology provides exceptional control over the motor, resulting in precise bass control and lower distortion. Integrated cooling fins located in the core of the driver along with Alpine's Unique CoolMountT Dual-Panel motor-mount help dissipate heat and enhance cooling.

Specifications:

Driver: 12" Shallow-mount
Power:
- RMS: 600W
- Peak: 1800W
Impedance: 2Ω (dual 4Ω voice coils, internally wired in parallel)
Frequency Response: 26Hz - 200Hz
Enclosure Type: Sealed, down- or up-firing
Enclosure Materials: 3/4" MDF, black automotive carpet
Dimensions:
- Width: 26.63"
- Height:
  - Enclosure w/o feet: 5.38"
  - Enclosure w/ one rubber foot: 5.88"
  - Enclosure w/ both feet and spacer: 6.63"
- Depth: 17.13"

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2 questions already asked

Is a single 12 inch sub enough for a sedan? I am currently running a single 10 inch and it falls short.

pancho Mar 09, 2025

1 answer

That is a good question! It is also a question whose answer will vary depending on the personal preferences of the listener. I recommend contacting a product advisor by calling 1-800-324-9695 to get a personal check if this subwoofer is expected to meet your goals

jason Mar 10, 2025 (Staff)

Do you have a sub enclosures that will fit an â??06 ford extended cab?

mikey Aug 06, 2023

1 answer

We sure do have some subwoofer enclosures that can be installed into a 2006 Ford pickup. I recommend contacting an advisor by calling 1-800-324-9695 to discuss your goals and get a personal recommendation on one.

jason Aug 06, 2023 (Staff)

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