Focal R-250S

Auditor Series 10" 4-ohm subwoofer

Item #: 091250S

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Bass rich

Focal's Auditor Series R-250S subwoofer is an excellent choice if you're upgrading your system on a budget. Paired with Auditor Series coaxial or component speakers, you won't spend too much cash, but your new listening experience will make you feel like a millionaire. 

Made to last

This sub's durable polypropylene cone and butyl rubber surround will endure the ravages of heavy bass output, while delivering powerfully precise low notes, thump after thickety-thump. Focal used a special design that maximizes ventilation inside the sub so that heat is properly dispersed during extended use. Match this sub with a sealed or ported enclosure, feed it up to 250 watts RMS, and you'll be bass rich for years to come.


To drive this single subwoofer, we recommend a mono amplifier rated between 200 and 375 watts RMS at 4 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.


  • 10" 4-ohm subwoofer
  • polypropylene cone with butyl rubber surround
  • 5-1/2" magnet
  • power range: 50-250 watts RMS (500 watts peak)
  • frequency response: 35-500 Hz
  • top-mount depth: 4-7/16"
  • sealed box volume: 0.71 cubic feet
  • ported box volume: 0.88 cubic feet
  • sensitivity: 88 dB
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's a component sub and why would I want one?

A component sub is simply a speaker that's designed to reproduce bass once it's installed in a compatible enclosure. Think about the impact of a movie soundtrack in a big theater or even in your own home HDTV setup. A component sub can add the same kind of power to the music in your car. And a car sub is not all about the boom that you hear on a street corner (although that's cool too) - you can pair a component sub with your choice of enclosure to get bass just the way you like it, from tight and punchy to fat and loose. And once you experience music in your car with a well-tuned subwoofer, you'll never go back.

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Hands-on research

What's in the box?

Download owner's manual

  • 10" Single voice coil woofer
  • Eight 1-3/8" Self-tapping screws
  • Owner's manual (English/ French/ German/ Spanish/ Italian/ Portuguese/ Chinese/ Russian)
  • Specifications printed on box

Product Research


Materials: The FOCAL R-250S features a polypropylene cone and butyl rubber surround to withstand the harsh automotive environment.

Binding Posts: The speaker terminals are threaded binding posts for easy connection of single banana plugs or bare wire up to 10 gauge.

Sealed Box Volume: FOCAL recommends a sealed enclosure with a volume of 20 liters (0.71 cubic feet).

Ported Box Volume: FOCAL recommends a ported enclosure with a volume of 25 liters (0.88 cubic feet) using a single port tube (port size not given).

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.