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Boston Acoustics® CS 26 II Black Bookshelf Loudspeaker-CS26IIB-0XX00

Model #: CS26IIB-0XX00
Boston Acoustics
At a Glance

Offering exceptional sound at an affordable price, the Boston Acoustics CS 26 II Two-Way 6-1/2-Inch Bookshelf Speaker is an ideal addition to your home theater or music system.

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Get to know this product.

2-Way 6-1/2 " Bookshelf Speaker that features:. Boston Kortec® soft dome tweeters for crystalline high-frequency sound.


Offering exceptional sound at an affordable price, the Boston Acoustics CS 26 II Two-Way 6-1/2-Inch Bookshelf Speaker is an ideal addition to your home theater or music system. It has been engineered with high-grade components to ensure stunning audio reproduction across a wide range of frequencies. A Kortec soft-dome tweeter offers crisp, high frequencies, while graphite-injected woofers deliver more bass response from less amplifier power.

Bookshelf Speaker Provides Immersive Sound

With the CS 26 II Bookshelf Speaker, you can enjoy your favorite media in richly detailed stereo sound. The speaker features a traditional square cabinet engineered for optimal acoustics. Pair it with other speakers from the Classic II series to create an expansive, cinematic soundstage.

Audio Technologies Deliver Stunning Performance

Each speaker in the CS 26 II is outfitted with Boston Acoustics' best audio technologies. The system incorporates Boston's Deep Channel Design: the polymer woofers are injected with graphite, allowing them to produce a more resonant bass sound without bottoming out. The tweeters feature a soft-dome design and have been treated with a stiffening agent to eliminate the high-frequency feedback that usually accompanies metal tweeters.

Together, the tweeters and woofers are able to reproduce frequencies ranging from 120 Hz to 25 KHz, ensuring faithful playback of your movie's audio track.

Smart Design Enhances Audio Experience

The CS 26 II also incorporates other smart audio-enhancing features. The speaker wires are equipped with five-way gold-plated binding posts, which ensure a secure and reliable wire connection. The gold plates also help preserve signal transfer, minimizing frequency losses and gaps. Additionally, the speaker features MagnaGuard magnetic shielding, which helps prevent video interference when the speaker is placed close to your screen.

Easy, Flexible Installation Options

The CS 26 II is designed for a quick and flexible installation. The speaker features a tower design and can be mounted on a wall or simply placed on the floor. Keyhole wall brackets are built into the speaker to ease wall-mounting. The speaker's wires are extra pliable, allowing you to place it wherever you choose.

Stylish Wooden Finish

The CS 26 II matches its exceptional audio quality with equally exceptional style. The speaker boasts two finish options; each complements a variety of furniture styles. It also features a traditional box cabinet, giving it a classic, balanced aesthetic.

The Goal of the Classic II Series

Boston's Classic II Series was designed to offer consumers an affordable, entry-level speaker solution without sacrificing sound quality. The series continues Boston's tradition of creating stylish, high-performance box speakers.

Boston Acoustics creates all of its speakers following the Play Smart approach to product design--sensible, useful, smart design features combined with contemporary styling. The Classic II series is no exception: each speaker in the series has been engineered using Boston's finest technologies to deliver outstanding performance.

The CS 26 II 6-1/2-Inch Bookshelf Speaker is backed by a five-year manufacturer's warranty, subject to the full warranty terms and conditions.

What's in the Box

  • CS 26 II Bookshelf Speaker
  • User's manual
  • Registration card

Product Features

  • 6-1/2" bookshelf speaker delivers crisp, detailed audio playback
  • Deep Channel Design woofers produce deep, resonant bass
  • Soft-dome tweeters for faithful reproduction of high frequencies
  • MagnaGuard shielding prevents video interference
  • Cabinet design lets you mount speakers on wall or place on surface
  • Five-year warranty

Additional Specifications

Frequency Range (±3dB)52Hz – 25kHz
Recommended Amplifier10 – 150 watts
Sensitivity89dB [SPL/2.8V at 1m]
Nominal Impedance8 ohms
Crossover Frequency2,400Hz
Woofers6 1/2” (165mm) DCDGraphite injected polymer woofer
High-Frequency Driver1” (25mm) Kortec Soft Dome
Dimensions (H x W x D)12-1/4 x 9-3/4” x 7-11/16”
Weight10 lbs (4.45kg)

Misc. Specs

Product Weight10
Depth (in.)7.69
Width (in.)9.75
Height (in.)12.25
Impedance8 ohms
Woofer Size6.5"
Speaker TypeBookshelf Speakers
Number of Speakers1
Manufacturer Warranty5 Year
Sensitivity89 dB
WarningProposition 65 Warning for California Residents