Input Connections - Sherwood XA-5450 Operation Manual

Input Connections
This amplifier will accept low level inputs only. Low level
is the same as line level or preamp level. Low level signal
is carried through RCA cables. Be sure that the head unit
is equipped with the Low Level outputs.
1. Low level/line input-Connect RCA cables from head
unit, or other signal processor, to the line level input on
the amplifier. See Fig. 3. Low level input Connections.
If the amplifier is to be used to drive one speaker in the
bridged mode, both inputs must be used.