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Boston Acoustics' HSi-4830 is one of their best in-ceiling speakers to date. Its three-way driver setup will have guests wondering where the big speakers are. Movie dialogue comes through clearly and musical instruments have a rich, natural tone. Boston Acoustics also designs all their in-wall and in-ceiling speakers for simple do-it-yourself installation. The HSi-4830 mounts flush in the ceiling and comes with a magnetic grille that's paintable to blend seamlessly into your home.

Full, rich sound from on high
The HSi-4830 is one of the rare 3-way in-ceiling speakers, able to deliver impressively full-bodied sound. A 1" swiveling tweeter lets you direct the highs for great results in almost any room you choose. A 3-1/2" midrange speaker brings clarity to voice and instruments alike. The '4830 rounds out the package with a muscular 8" woofer for lows you don't often hear from an in-ceiling speaker.

An NCBR8 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 at the Crutchfield Learning Center.
Shop our selection of in-wall speaker wire.

Product Highlights:

  • sold individually
  • 1" swiveling soft-dome tweeter for flexible speaker placement
  • 3-1/2" midrange
  • 8" woofer
  • handles up to 100 watts
  • frequency response 48-20,000 Hz (±3dB)
  • sensitivity 88 dB
  • 8-ohm impedance
  • moisture resistant for bath and kitchen applications
  • paintable magnetic speaker grille
  • cutout dimensions: 10-7/8" diameter
  • mounting depth: 6"
  • warranty: 5 years
  • Our 60-day money-back guarantee

Boston Acoustics HSi-4830 Reviews

Hands-on research

What's in the box?

Download owner's manual

  • 1 Ceiling-mount speaker
  • 1 White metal grille
  • 3" Phillips head bit
  • Cardboard template
  • Plastic paint mask (speaker)
  • Wax paper paint shield (grille)
  • Instruction booklet (English/ Spanish/ French/ German)
  • Warranty information
  • Product registration card
  • Disposal note

Features and Specs

Enclosure Type In-ceiling
Video Shielded No
Tweeter Dome
Midrange Size 3.5
Woofer Size 8
Woofer Composition Copolymer
Woofer Surround Rubber
Power Range (Watts) 10-100
Sensitivity 88 dB
Impedance (Ohms) 8
Frequency Response 48-20kHz
Connector Type Spring Posts
Bi-Amp Inputs No
Parts Warranty 5 Years
Labor Warranty 5 Years

Product Research



Woofer: The Boston Acoustics HSi 4830 uses an 8" DCD (Deep Channel Design) copolymer woofer with a die-cast aluminum basket. The DCD woofer uses a deeply grooved pole plate that enables the voice coil to travel farther for greater output without bottoming.

Directional Midrange and Tweeter: The 3-1/2" copolymer midrange and 1" Kortec dome tweeter are mounted on an angled baffle, designed to face the listening area. The entire speaker will rotate almost 360° within the frame so the mid/tweeter baffle can be turned in any direction, even after the speaker is mounted.

Kortec: The tweeter is a 1" Kortec dome. Kortec is a silky fabric saturated on the underside with a proprietary stiffening agent. Because the inside surface of the dome is ultra stiff, the tweeter tracks the signal with ease and produces an excellent transient attack. Simultaneously, the soft, self-dampening top layer eliminates unwanted resonance, so the sound is smooth and articulate.

Moisture Resistant: The HSi 4830 is well suited for humid environments like the kitchen or bathroom. Make sure they are positioned so that moisture cannot collect inside them. They are not designed for locations where they will be submerged.

Inputs: Spring loaded posts will accept banana plugs (single or dual) or bare wire up to 12 gauge.


Installation: After a 10-7/8" diameter cutout is made the speaker is installed into the opening and held in place with four integral plastic mounting ears. The required depth to install the speaker is 6" 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 3/8" thick for the mounting ears to work.

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

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.

Optional Bracket: The NCBR8 new-construction bracket (item number 065NCBR8, 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.