Alpine Type-R 8 (SWR-8D2, 4) Enclosure System - SBR-S8-4

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Loud, Clean Bass That Fits Anywhere

The SBR-S8-4 8 Enclosed Subwoofer lets you add deep, accurate bass to your sound system without taking up much space in your vehicle.

Speaker Rating:

Max RMS Power Capacity: 350W

Peak Power Capacity: 1000W

Type-R Technology

The SBR-S8-4 uses the same 8 subwoofer available in the Type-R component subwoofer lineup, so you get high excursion combined with high power handling. This advanced Type-R motor structure converts your amplifier s output to low bass you can feel.

More bass, less space

The SBR-S8-4 is compact and very shallow (only 11 1/2 wide x 19 1/4 long x 5 1/2 deep) allowing it to be mounted in virtually any vehicle. This compact subwoofer system works well under or behind the seat of a pickup truck, in a sedan trunk, or in the hatch of an SUV. /p>

Tuned to rock

In order to play low with minimal power input requirements, the SBR-S8-4 is ported. A low tuning frequency combined with an efficient, large cross-section port allows the system to play down to the lowest octaves while still maintaining excellent control and power handling characteristics.

Killer cosmetics

High-quality carpeting and sleek laminate combine to give the SBR-S8-4 great looks. A strong, attractive Type-R grille protects the woofer s cone from damage, and the flush-mount spring-loaded terminals make connecting large-gauge wire a snap.

Durable construction

Unlike many low-cost enclosures, the SBR-S8-4 is constructed from the best materials. High-quality MDF is used for all structural components, and it is internally braced to add stiffness and durability.

Amp it up

350 watts of RMS power handling make the SBR-S8-4 compatible with a wide range of mono and multi-channel amplifiers. For example, hook it to the subwoofer channel on the 5-channel Alpine MRX-V60, or connect it to two bridged channels on an Alpine MRX-F30 either way you ll get great low-bass performance.

Features and Specification

Power Handling

  • Power Range: 150W - 350W
  • RMS Power Handling: 350W
  • Peak Power Handling: 1000W


  • Height: 483mm (19")
  • Width: 283mm (11-1/8")
  • Depth [including Grill]: 135mm (5-5/16") [160mm (6-3/8")]


  • Frequency Response: 30Hz - 200Hz


  • Model: SBR-S8-4


  • Model: SWR-S8D-2D (wired in parallel, 4Ohm)


  • Model: KTE-8G

Enclosure Type

  • Material: 3/8" MDF (3/4" Front Baffle), Carpeted w/ Brushed Aluminum Trim
  • Design: Ported


  • Frequency: 30Hz

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