Boston Acoustics SP4 Specifications

SP4 and SP6
High performance speaker selectors
Boston Acoustics Speaker Selectors allow the easy orchestration
of sound throughout the whole house from just one power
amplifier. With a press of a button, sound is directed to
any room or combination of rooms, and up to six (SP6) or
four (SP4) pair of speakers.
The SP6 and SP4 make connecting multiple pairs of
speakers to any amplifier or receiver easy, efficient and safe.
Designed with high quality resistors, automatic impedance
matching and convenient, detachable connectors, they permit
maximum output and sound quality from your speakers while
maintaining abundant protection for your amplifier.
The SP6 and SP4 are the result of superior design and
engineering synonymous with every product bearing the
Boston name; products that set the standard for dynamic,
undistorted, room-filling sound. When used to control our
own award-winning speakers in a complete Boston system,
the sound is utterly stunning. Smooth, octave-to-octave tonal
balance without favoring one frequency over another. Greater
detail with no distortion from one end of the spectrum
to the other. Clear and uncolored. Pure and natural. The
true-to-the-original performance ™ known as The Boston Sound. ™