SoundCraft Spirit Folio 4 - Manual (Page 11)

Normally the Monitor and Phones outputs receive
either the Mix signal or the 2 Track Return signal,
depending on the position of the MIX/2TK switch.
STEREO LISTEN provides a further choice of
sources from Aux Sends 5-8, Groups 1-4 or
Stereo Returns PFL. The switches are
non-interlocking to allow several sources to be
monitored simultaneously. The PPM meters
monitor the selected signal.
This control sets the output level to the
MONITOR LEFT & RIGHT outputs. If
HEADPHONES are plugged into the
PHONES jack the Monitor outputs are
cut off, and the knob then sets the
headphone listening level. When the
PHONES are unplugged the Monitor
output is restored.
Press this switch to route the TAPE RETURN signal direct to the mix
outputs. Adjust the input level with the TAPE RETURN LEVEL control.
The Tape Return signal will now be present at the Mix outputs, at a level
set by the Master Faders, and the meters will display this same signal.
DO NOT press this switch if recording via the Mix output to the same tape
machine or oscillation may occur.
Press this switch to route the TAPE RETURN
signal to the MONITOR and PHONES outputs.
Adjust the input level with the TAPE RETURN
LEVEL control. The PPM meters will now be
directly reading the level of the Tape Return.
The TAPE RETURN jacks are an ideal place to connect the playback of
a tape machine, without using up any of the LINE inputs. This pot sets
the level of playback signal fed either to the MIX (when MIX is pressed)
or MONITOR, when MIX/2TK is pressed. The inputs accept signals
from either 100mV semi-professional equipment or +4dBu professional
machines.
The TAPE RETURN is also the best way of connecting a tape or CD
player to feed pre-show music to a PA rig, since this leaves all input
settings unaltered. It can also serve as the return from an Effects unit
to save using up Line Inputs.