Zapco C2K - Manual (Page 9)

9
SymbiLink™ Balanced System
The most natural configuration for an audio system in the automobile
places the signal source in the dash with the amplifiers located some
distance away, usually under the seat or in the trunk of the vehicle. The
reality of this arrangement dictates the necessity to make long runs of low
level signal cable usually from the front to the back of the car. The
electrical environment in an automobile is one that is inherently noisy and
filled with conditions that threaten to degrade signal fidelity at every turn.
Capacitive loading due to the long cable lengths, the potential for ground
loops, alternator charging currents or currents generated by the amplifiers
themselves are all factors that induce noise and distortion into the signal
cables. By no means is this an ideal situation. Thankfully, ZAPCO has
found the solution.
SymbiLink  components convert a standard unbalanced audio signal
into the fully balanced domain usually reserved for expensive professional
audio equipment found in recording studios or at your local concert venue.
After this conversion is made, the audio cabling becomes virtually immune
to electrical interference in the surrounding environment and is much less
susceptible to signal degradation over long cable runs. It is for this reason
that balanced signal cables are common in professional or industrial
applications. ZAPCO has made this technology available for your car.
ZAPCO engineers also discovered that the pulsating D.C. current in the
automobile chassis and amplifier power wiring caused a significant amount
of low frequency distortion. ZAPCO's balanced SymbiLink technology
completely eliminates this distortion.