Lexicon CP-3 Plus Owner's Manual page 21

Connection
Connecting the CP-3
in a Tape Monitor Loop
16
PLUS
If you have a receiver with no external access to the preamplifier outputs,
you can use a tape output or external processor loop to the CP-3
However, any change in the receiver's volume control after the system is
adjusted will upset the balance between the main and auxiliary speakers.
* In this configuration, use a Y-connector to hook the VCR to Video 1 as well if its tuner is
used instead of the TV tuner.
** In this configuration, select the TV's video input to see the CP-3
Lexicon
.
PLUS
PLUS 's on-screen display.