Boston Acoustics CS 23

Single compact bookshelf speaker (Black)

  • Boston Acoustics CS 23


  • Boston Acoustics CS 23

    Back (Black)

Item #: 065CS23B

Review Summary

This item is no longer available to purchase.
Contact us for other options
Call   Email  
Original price $69.99
We recommend this similar item, or shop all Bookshelf Speakers

Our take on the Boston Acoustics CS 23

by Chris Egner
Boston Acoustics

Why choose bookshelf speakers?

Bookshelf speakers may be small in size, but they can deliver surprisingly big sound. Some ultra-compact models even fit on a desktop. Most are right at home in tight spaces like shelves, so they're usually good choices for your home theater's rear channels. For the best performance, try placing bookshelf speakers on solid speaker stands to help the sound really "open up." If you want full bass impact, add a powered subwoofer and enjoy punchy sound that's as deeply satisfying as that of floor-standing speakers.

This compact bookshelf speaker from Boston Acoustics fits just about anywhere. Team up a pair of CS 23s with a matching powered subwoofer for crisp, full stereo sound, or use up to seven of these speakers and a sub for home theater sound that immerses you in the action on your TV screen. You'll hear precise, crystal-clear highs thanks to this speaker's 1" soft dome tweeter. And the 3-1/2" graphite-injected polymer woofer brings home detailed, dynamic mids.

You can also build a complete Classic Series speaker system by combining the CS 23s and a sub with floor-standing front speakers and a center channel speaker.

See more info on this item


  • video-shielded
  • bass-reflex (ported) design
  • frequency response 120-20,000 Hz (±3dB)
  • handles up to 150 watts
  • 1" Kortec® soft dome tweeter
  • 3-1/2" Deep Channel® Design graphite-injected polymer woofer
  • impedance: 8 ohms
  • sensitivity: 89 dB
  • 5-way binding posts
  • 5-1/16"W x 7-11/16"H x 5-1/2"D
  • weight: 4 lbs.
  • warranty: 5 years
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Bass Reflex
Video Shielded
Tweeter Type
Tweeter Size (inches)
Midrange Size (inches)
Woofer Size (inches)
Woofer Composition
Graphite inj poly
Woofer Surround
Power Range
89 dB
Impedance (Ohms)
Frequency Response
120-20k Hz
Connector Type
5-way post
Bi-amp Inputs
Height (inches)
Width (inches)
Depth (inches)
Weight (pounds)
Mounting Bracket Included
Recommended Stand Height (inches)
Parts Warranty
5 Years
Labor Warranty
5 Years
Product Research
What's in the box?

Download owner's manual

  • Black CS 23 2-way bookshelf speaker
  • Black cloth grille (attached)
  • 4 Short adhesive backed rubber feet
  • 2 Tall adhesive backed rubber feet
  • Owner's Manual (English/ Spanish/ French)

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 open the box, verify contents, 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.

Driver Technology
Mounting Options

Driver Technology

Tweeter: The CS 23 uses a 1" Kortec soft dome tweeter for clear high frequencies. 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.

Woofer: The CS 23 has a 3-1/2" graphite injected polymer woofer with a phase plug. The speaker features Boston's Deep Channel Design technology to give you more bass with less amplifier power. Rubber surrounds are used for added durability. The enclosure is ported on the back panel.

MagnaGuard: The speaker features MagnaGuard magnetic shielding which ensures the speaker's magnetic field does not interfere with a CRT television's picture.

Bass Management Recommendation: When setting bass management parameters on your home theater receiver, the outputs for this speaker should be set to Small with the subwoofer's crossover point between 80 Hz and 120 Hz.


Gold-plated Binding Posts: The wire terminals are gold-plated, 5-way binding posts, allowing you to connect the speaker wire using dual banana plugs, single banana plugs, pin connectors, spade terminals, or bare wire. Bare wire up to 10 gauge fits through the binding posts.

Mounting Options

Mounting: A keyhole bracket mounted on the back of the speaker allows wall mounting without purchasing an additional bracket. When wall mounting, affix the included tall rubber feet to the back of the speaker along the bottom. The bracket holds the speaker approximately 3/8" from the wall.

Review this product
Great Gear Giveaway rewards card

Submit a review and then enter to win a $500 rewards card

Boston Acoustics CS 23 Reviews

Average Customer Review:

1 people say:

Review this product:

Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

Your email won't be visible. Please use the email address that is associated with your order.
(e.g., JohnD) Your review will be signed using the display name and location
(e.g., Charlottesville, VA)

Click on a star to rate the overall product on a scale of 1-5
1500 characters left
Attach a YouTube Review
Crutchfield Video Review Guidelines
  • Only submit videos that you made or are authorized to use.
  • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
  • Please see our Review Guidelines for more information.
500 characters left
500 characters left
Filter by rating:
5 out of 5

excellent speakers within this price.

Written By sajjad, owings mills on Monday, February 28, 2011
Crutchfield Customer Review (What's this?)
I bought 5 of these small speakers and one center channel speaker from crutchfield a
week ago. I was not sure about the performance of the speakers but when i hooked
them up with my denon receiver i was surprised to see the performance of these tiny
speakers. If you have a good subwoofer, just put in your receiver system as a small
speaker and it will give you a good bass sound and performance. Another reason i
bought them from crutchfield is because they are very trustworthy people. In these days
you might get a better deal but its hard to trust most of them. So i recommend crutchfield
and these CS23 speakers. They are an excellent deal within this price. Their packaging
performance is excellent. Whoever works in that department is doing an excellent job.
Thank You.
3 out of 3 people found this helpful
Was this review helpful?    Yes | No

Add accessories for the Boston Acoustics CS 23

Add connectors to your bulk speaker wire for a neater, easier, and more reliable installation. See all categories & accessories

9 people say
Your Price: $13.95
Add to Cart
Original Monster Cable With gold pin connectors (15-foot pair)
34 people say
Your Price: $39.99
Add to Cart
Monster Cable SuperFlat™ Mini Decor-friendly speaker cable with gold pin connectors (50-foot spool)
24 people say
Your Price: $34.95
Add to Cart
AudioQuest Type 4 Speaker cables with pre-attached banana connectors (10-foot pair)
22 people say
Your Price: $248.99
Add to Cart
Sanus BF31B Speaker Stands Basic Foundations® — 31"
48 people say
Your Price: $49.99
Add to Cart
Sanus NF36 Speaker Stands Natural Foundations Series IV — 36" (Black lacquer)
30 people say
Your Price: $99.99
Add to Cart
Sanus NF30 Speaker Stands Natural Foundations Series IV — 30" (Black lacquer)
32 people say
Your Price: $89.99
Add to Cart
Bell'O SP-300 30" speaker stands
1 person says
Your Price: $139.99
Add to Cart
Bell'O SP-200 36" speaker stands
5 people say
Your Price: $149.99
Add to Cart

Why choose SquareTrade?

The #1-Rated Protection Plan

Thousands of people have reviewed SquareTrade Protection Plans — and made us #1.

5-Day Service Guarantee & Free Shipping

We'll repair or replace your item in five business days or less after we've received it, or your plan is free. And, as always, we pay for all shipping.

Protection from Normal, Everyday Use

Repairing your average mechanical or electrical failure can cost as much as buying a new device. With SquareTrade, you're covered — including parts and labor.

For a more in-depth review and enhanced detailed information on the Boston Acoustics CS 23, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_065CS23B/Boston-Acoustics-CS-23-Black.html ).