Input And Outputs - PSB CWA-1 Installation Manual

Inputs and Outputs
For receiving and sending a signal back and forth between the rest of the system
the CWA-1 uses line level inputs and outputs. These are at the intermediate
levels found just prior to amplification to the power required to drive a
loudspeaker.
There are three inputs to the CWA-1: one stereo pair is marked simply "INPUT"
while a third jack is labeled "X'OVER BYPASS, LFE INPUT" The distinction
between these two input types are that signals connected to the X'OVER
(crossover) BYPASS input do not go through the CWA-1's variable filter. In the
case of using this input the front panel control labeled CROSSOVER
FREQUENCY is not in circuit. All other controls (PARAMETRIC EQUALIZER,
PHASE, etc.) are still in circuit. The X'OVER BYPASS input will only be used if
frequency filtering is in the preceding processor and you want that to be the only
filtering in circuit.
Signals sent to the other jacks (INPUT) will have any low frequency content
summed. That is, bass from the left and right channels of a stereo signal will be
combined for the one subwoofer. It is perfectly acceptable to connect a single
filtered subwoofer or LFE signal to these inputs in which case either the Left or
Right channel input can be used with exactly the same effect.
A final pair of line level jacks are marked "OUTPUT". These contain the Left and
Right Input signals but with the bass content filtered below a fixed crossover
frequency of 80Hz. Although the bass is mono combined, these outputs maintain
full stereo isolation. Note that if the X'OVER BYPASS input is used no signal will
be present at these outputs.
Toward the right side of the amplifier are the Subwoofer output 5-way binding
posts marked "SPEAKER". These binding posts are for the speaker level
connection to one or 2 subwoofers. The two red (+) and black(-) binding posts
are in parallel. The CWA-1 will drive down to 2 ohms so it is permissible to
connect two 4 Ohm subwoofers in parallel through these posts for a combined
impedance of 2 Ohm.
12