Boston Acoustics XB4 - Manual (Page 3)

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Description
Boston’s XB4 subwoofer delivers the dynamic bass foundation that is essential for lifelike reproduction of movie
soundtracks and music in the home. This attractive, powered subwoofer will complement any stereo or home theater
sound system with its impressive bass output and compact size.
This subwoofer utilizes our rugged Deep Channel ® Design (DCD) bass unit designed in Boston’s state-of-the-art
engineering facility in Peabody, Massachusetts. Every one is tested as it comes off the line to be within ±1dB of
the lab reference unit, an incredibly tight tolerance. The amplifier has a built-in variable crossover that makes it
easy to achieve a seamless blend with the main speakers, while a 24dB/octave lowpass filter prevents the
subwoofer from being easily localized by ear, increasing placement flexibility. A crossover bypass function is
provided for use with home theater electronics that perform their own bass management.
Because of its high-powered amplifier and computer-optimized tuning, the XB4 is capable of impressive deep bass
and high output from a remarkably compact enclosure. In addition, it features BassTrac
® , a proprietary Boston-
designed circuit that tracks the input signal to the subwoofer and prevents its amplifier from being driven into
audible distortion. The benefit: the bass stays clean and strong at any listening level.
Auto on-off amplifier switching and easily accessible controls make the XB4 subwoofer as convenient to use as it
is exciting to listen to.
Specifications*
Frequency Response (±3dB) 38–180Hz
Subwoofer Amplifier Power 400 watts dynamic power output
Nominal: 100 watts RMS @ 1% THD maximum
FTC Rated Power: 85 watts from 38-180Hz at less than 1% THD
Subwoofer Crossover 75–150Hz
24dB/octave lowpass
LFE Input Yes
Crossover Bypass Yes
Peak Power Level 400 watts
Bass Unit 10" (254mm) DCD
Enclosure Type Ported, Front Firing
Dimensions (HxWxD) 12.2 x 14.17 x 13.425"
(with feet and rear connectors) (310 x 360 x 341mm)
Weight 26 lbs (11.8kg)
*In keeping with our policy of continual product improvements, specifications are subject to change without notice.