Focal RSB-300 Auditor 12" Dual 4-Ohm Voice Coil Subwoofer

Model: RSB-300 UPC: 3544053750569 Item: 170892

$209.99 OR

Regular Price: $270.00

Save: $60.01 (22%)

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754 Route 309 (Bethlehem Pike) Montgomeryville, PA 18936
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  • Tues, Wed, Fri, Sat: 10AM - 5PM
  • Thurs: 10AM - 8PM
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(215) 368-8343
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38 Greenfield Avenue, Ardmore, PA 19003
  • Mon: CLOSED
  • Tues, Wed, Fri, Sat: 10AM - 5PM
  • Thurs: 10AM - 8PM
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(610) 649-7002
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Focal RSB 300 Overview

Focal’s RSB 300 12” car subwoofer proudly carries the craftsmanship and produces the sound quality that Focal is known for. Dual 4-ohm voice coils allow different wiring configurations while the sturdy polypropylene woofer cone belts out bass response with stunning clarity. Best of all, it’s quite affordable, too!

Product Information

RSB-300 Auditor 12" Dual 4-Ohm Voice Coil Subwoofer

12″ Subwoofer for Sealed Enclosures

  • Butyl surround, High resistance
  • Steel basket, Rigid and compact
  • Spider decompression, Voice coil ventilation
  • 2″ (50mm) voice coil, Kapton former
  • High power handling
  • Ported or sealed enclosure

Product highlights

  • 12” subwoofer
  • Polypropylene woofer cone for clean bass response
  • Rubber surround for long-lasting performance
  • Dual 4-ohm voice coils for different wiring configurations
  • Up to 300 watts of continuous power handling
  • Peak power handling: 600 watts
  • Frequency response range: 25Hz – 1000Hz
  • Sensitivity: 90dB
  • Mounting depth: 5-5/8”
  • Sealed box volume: 1.0 cubic ft.
  • Ported box volume: 1.5 cubic ft.
  • Warranty: 1 year (World Wide Stereo is an authorized dealer for all brands we sell)
  • World Wide Stereo 60-day guarantee and product support

Add Bass to Your System

By adding the Focal RSB 300 12” subwoofer (with an amplifier, of course) to your existing audio system, you’re going to receive the bass response that you crave. It doesn’t matter if you listen to classical music, heavy metal, or hip hop – it all sounds so much better with a subwoofer in the mix.

Perfect Sound for a System on a Budget

The RSB 300 car subwoofer was designed to enhance your listening experience; not destroy your budget. Focal’s sound engineers make some of the finest-sounding car subwoofers on the market – and that’s across all of the price points. The RSB 300 doesn’t require a ton of power (it can continuously handle up to 300 watts) and doesn’t require a large sealed enclosure (only 1.0 cubic foot!). So, what are you waiting for?

Dual Voice Coil Design

Focal opted to use a dual voice coil design in the RSB 300. What does this mean? It means that instead of one voice coil, there are two. This allows you to wire the subwoofer in different ways to achieve the final impedance that you desire. In the case of a single RSB 300 being used and the voice coils are wired in parallel (meaning the positive of voice coil 1 is connected to the positive of voice coil 2 and the negative of voice coil 1 is connected to the negative of voice coil 2), that final impedance is 2 ohms, which your monoblock amplifier will love.

Allow Us to Suggest…

To properly power this subwoofer (assuming you are using only a single RSB 300 in your setup and the subwoofer’s voice coils are wired together in a parallel fashion), we would recommend a single-channel (or monoblock) amplifier that is stable at 2 ohms. Ideally, the power output of this amplifier at 2 ohms would fall around 300 watts.



  • Diameter: 12" (300mm)
  • Dual Voice Coil: 4 ohms per coil
  • Voice-Coil Diameter: 2" (50mm)
  • Cone: Polypropylene
  • Max Power: 600W
  • Nominal Power: 300W
  • Sensitivity (2.83V/1m): 90dB
  • Frequency Response: 35Hz - 500Hz

What's in the Box

What's in the Box:

  • One RSB-300 subwoofer
  • Mounting hardware
  • Owner's manual


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