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Boston Acoustics extends the quality you expect to their in-ceiling speakers. You can enjoy home theater sound or music throughout the house without sacrificing fidelity. This speaker installs directly in your ceiling, making it a great choice for rooms without lots of space to spare. Pick up a pair for great stereo sound in the kitchen, laundry room, or den. Plus, you can paint the frame and grille to blend in with your décor.

An NCBR6 in-ceiling bracket is recommended for installing this speaker in a new home under construction or in a room that's undergoing major renovation. (Brackets sold as a pair.)

Got wire?
Most speakers don't include any. Learn more about in-wall wiring.
Shop our selection of in-wall speaker wire.

Product Highlights:

  • sold individually
  • 3/4" dome tweeter
  • 6-1/2" woofer
  • handles up to 90 watts
  • frequency response 65-20,000 Hz (±3dB)
  • sensitivity 90 dB
  • 8-ohm impedance
  • paintable speaker grille
  • cutout dimensions: 8-7/8" diameter
  • mounting depth: 4"
  • warranty: 5 years
  • Our 60-day money-back guarantee

Boston Acoustics CS270 Reviews

Average Customer Review:

1 Review

Boston Acoustics CS270

Written by: skygremlin from SoCal on October 24, 2012

Crutchfield Customer Review (What's this?)

I have only owned Boston acoustic speakers so I really cant say they are (pick your number) times better than say Yamaha, Polk, or Klipsch.. But I am very happy with these. I have them set up in a 7.1 config. These are my surrounds and rear surrounds. Bottom line is the speaker install was very easy and they sound great.

Pros: install and sound

Cons: none

Hands-on research

What's in the box?

Download owner's manual

  • 1 Ceiling-mount speaker
  • 1 White aluminum grille
  • Plastic paint mask
  • Instruction booklet (English/ Spanish/ French/ German)
  • Product registration card

Features and Specs

Enclosure Type In-ceiling
Video Shielded No
Tweeter Dome
Midrange Size ---
Woofer Size 6.5
Woofer Composition Laminate Film
Woofer Surround Rubber
Power Range (Watts) 10-90
Sensitivity 90 dB
Impedance (Ohms) 8
Frequency Response 65-20kHz
Connector Type Clip
Bi-Amp Inputs No
Parts Warranty 5 Years
Labor Warranty 5 Years

Product Research


Installation: After an 8-7/8" diameter cutout is made the speaker is installed into the opening and held into place with four integral plastic mounting ears. The required depth to install the speaker is 4" from the mounting surface (this includes the thickness of the drywall). Behind the opening there must be a 1" clearance around the speaker to accommodate the ears. The mounting wall material must be at least 1/4" thick for the mounting ears to work.

Paintable: Both the frame and grille can be painted to match the ceiling. A plastic paint mask is included to protect the speaker from being painted as well.

Inputs: The speaker clips will accept bare wire up to 14 gauge.

Optional Bracket: The NCBR6 new-construction bracket (sold separately) can be used to simplify installation in new construction.

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.