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Boston Acoustics builds their HSi-series for people who love great sound but want to avoid the clutter of speakers. Movie dialogue sounds clear and the notes of woodwinds, strings and brass have a natural tone. Boston Acoustics also designs all their in-wall and in-ceiling speakers for simple do-it-yourself installation. The HSi-275 mounts flush in the wall and comes with a magnetic grille that's paintable to blend seamlessly into your home.

An in wall mounting 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 at the Crutchfield Learning Center.
Shop our selection of in-wall speaker wire.

Product Highlights:

  • sold individually
  • 3/4" tweeter
  • 6-1/2" woofer
  • handles up to 90 watts
  • frequency response 65-20,000 Hz (±3dB)
  • sensitivity 90 dB
  • 8-ohm impedance
  • magnetic, paintable speaker grille
  • cutout dimensions: 10"H x 7-3/8"W
  • mounting depth: 3-1/4"
  • warranty: 5 years
  • Our 60-day money-back guarantee

Boston Acoustics HSi-275 Reviews

Hands-on research

What's in the box?

Download owner's manual

  • 1 In-wall speaker
  • 1 White metal grille
  • Plastic paint mask
  • Cardboard template
  • Installation instructions (English/ Spanish/ French/ German)
  • Product registration card
  • Disposal note

Product Research


Installation: After a 10" x 7-3/8" cutout is made (either vertically or horizontally) the speaker is installed into the opening and held in place with the integral plastic bracket. The required depth to install the speaker is 3-1/4" from the mounting surface (this includes the thickness of the drywall). Behind the mounting surface there must be a 1-1/2" clearance on both ends of the speaker (along the short sides). The mounting wall material must be at least 3/8" thick for the mounting bracket 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.

IR Sensor Knockout: The speaker has a knockout molded into the speaker baffle that will accommodate a standard 1/2" diameter infrared (IR) sensor for an optional remote IR remote control system.

Placement: The HSi 275s can be mounted either vertically or horizontally. If mounted horizontally, each speaker should be turned so the tweeters are in the inside. If mounted vertically and the bottom edge is more than 66" above the floor, invert the speaker so the tweeter is below the woofer. The speakers should be mounted at least 12" away from a tube-TV to avoid interference with the picture.

Magnetic Grille: The grille is magnetically mounted for easy installation.

Optional Bracket: The NCB6 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.