Ashly INSTRUMENT PREAMP SC-40 - Manual (Page 3)

B. EFFECTS SEND-RETURN
These two jacks may be used to insert line-level effects
or signal processing devices into the signal path. Connect >
the EFFECT SEND to the device input and connect the device
output to the EFFECT RETURN. Low-level effects devices should
be connected between the instrument and the SC-40 front panel
input.
C. STAGE OUTPUTS
Use the HIGH-level output to directly drive a power
amplifier (Crown, BGW, Phase Linear, etc.) and use the LOV/-
level output to drive conventional musical instrument amps.
If you need more or less level and can't correct the problem
by adjustment, try the other output.
D. PA OUTPUTS
Use the mic-level PA output to directly connect the SC-40
to a studio or PA system mixing console microphone input, or
use the LINE-level output to drive a line input. The mic.
connection should be used for long cable runs because it is a
balanced line which helps to minimize noise. (This mic-level
output can be used with any console mic input including
balanced, unbalanced, and phantom powered types.)
IV. OTHER HOOKUPS
With the multitude of inputs and outputs available on
the SC-40, there are many possible variations in its use. A
few are presented here as an illustration. Experimentation viill
be necessary to exactly meet individual needs.
1. When not using the PA output as a direct feed, it may be
used to feed a second stage amplifier, with seperate level
control.
When taking a line-level feed from another amplifier of
preamp, connect it into the EFFECT return rather than the
front panel input thus bypassing the preamp section of
the SC-40, but still using the equalizer.
Smooth distortion may be produced by wiring (2) 1N914 diodes
paralleled in opposite directions between the tip and sleeve
of a phone plug and inserting it into the EFFECTS send.
A foot switch can be wired in series with the tip of the
plug to switch out the distortion.