Basic Connections: Speaker Cables  Speaker cables connect the
outputs of the power amplifier or the amplifier section of the
receiver to the speaker. These cables carry the high-powered
electrical currents required to move the internal components of
the speaker (the magnets that move the drivers).  You need one
pair of speaker cables for each speaker in your home theater
(except the subwoofer, if it's an active system that uses an
analog audio interconnect cable). Some expensive speaker systems
can use two pairs of speaker wires per speaker. These systems
are either biwired or biamped:    • Biwired: Two sets of speaker
wire connect to the same output on the receiver or power
amplifier, and you plug them into two sets of terminals on the
speaker itself. In most cases, this setup is not worth the
expense of the extra set of speaker cables.    • Biamped: The
speaker uses two separate amplifiers — one for the low-frequency
drivers and one for the high-frequency drivers.  Because they
typically go for longer dista