Peavey CS 400x - Channel B Connections and Crossover; PL-2 Selector Switch; Transformer Receptacle; Crossover Inputs

PL-2 SELECTOR SWITCH(12)
The function of this switch is identical to that of channel A function. The “OUT" position of
this switch selects the QUASI-BALANCED mode of operation for the LOW Z INPUT (XLR
jack) and routes this input signal directly to the HI Z INPUT jacks if these jacks are not in use.
Since this signal is also routed to the CROSSOVER INPUT jacks, now these jacks may be
used as outputs after the LOW Z INPUT to allow patching this signal to another input on this
amplifier.
Similarly, the “IN" position of the switch routes the input signals from the XLR jack through
the (PL-2) line-balancing transformer thus selecting the TRANSFORMER-BALANCED
mode of operation for the LOW Z INPUT. In this position the CROSSOVER INPUTS may
be used as outputs after the line-balancing transformer to patch the signal to another input
jack on this amplifier or other amps/equipment. Again selecting the “IN" position without a
(PL-2) line-balancing transformer IN the receptacle will render the LOW Z INPUT inoperable,
and this switch can be used to test the “effectiveness” of TRANSFORMER BALANCING.
TRANSFORMER RECEPTACLE(13)
This receptacle only receives the optional (PL-2) line-balancing transformer. When conditions
exist that demand the usage of a TRANSFORMER-BALANCED XLR INPUT at the input of
channel “B*\ or at the input of the PL-MODULE ELECTRONIC CROSSOVER when
BIAMPING then the <PL-2) transformer must be put here, and the selector switch must be in
the “IN" position.
CROSSOVER INPUTS (14)
These arc the HI Z INPUTS for the ELECTRONIC CROSSOVER when installed. Two
parallel input jacks are again provided at this point, allowing the flexibility of the Y-cord
capability here as well. These jacks are also not chassis grounded and will provide a QUASI-
BALANCED input capability to minimize potential groundloops. Again, this feature is
automatic. As mentioned, the output of the low Z input circuitry of channel B is always con¬
nected to these inputs, which allow the LOW Z INPUT to be used as the ELECTRONIC
CROSSOVER input if desired. These inputs then can be used as the FULL RANGE outputs
allowing additional patching capability.
CAUTION: When a full range signal is patched into either the XLR input or the crossover
inputs on channel B to feed the crossover module itself this full range signal is also routed to
the channel B input. The final patching from the crossover output to the channel B input
disconnects this full range signal feed to the channel B input and instead is patched to the
appropriate crossed-over signal. This occurs because the channel B input jacks arc switching
type. If you were to inadvertently disconnect the cable which is routing the crossed-over
signal to the channel B input, the switching arrangement will feed a full range signal to that
channel and could possibly destroy the transducer that is connected to this channel output.
Always reduce levels before attempting to make any patching changes.