Ashly Keyboard Input Processor SC-44 - Manual (Page 2)

I. INTRODUCTION
The Ashly Audio model SC-44 Keyboard Input Processor was
designed to help solve some of the problems associated with today's
electronic keyboard instruments. In particular, it provides
a means of performing the critical first stage of amplification
for a wide variety of musical instruments with an absolute
minimum of noise and signal loss, has provision for the connection
of studio type line-level effects devices, operates with either
line-level power amplifiers or musical instrument amps, and
includes a direct output with a separate level control for
connection to studio or PA console microphone inputs. Individual
tone controls for each channel are low and high shelving type.
Master tone control is accomplished using a sophisticated 3-band
tunable equalizer making possible a wide range of voicings.
A "peak" indicator warns of approaching overload anywhere
in the unit and the overload characteristic is one of "clean"
clipping free from spikes or transients.
II. INPUT, OUTPUT, AND POWER CONNECTIONS
The preamp should be connected to a 3-wire grounded outlet
supplying 120 Volts, 50-60 Hz. Power consumption is 12 watts.
Inputs are high-impedance, unbalanced on a standard 1/4" mono
phone jack mating with a standard mono phone plug such as a
Switchcra*ft //280.
Return connectors are all balanced inputs on a standard 1/4"
stereo phone jack. The high side is on the tip, the low side
on the ring. Unbalanced sources may also be connected to the
returns by simply using a mono phone plug.
Except for the mic-level PA output, all output connections
are unbalanced on standard 1/4" phone jacks which mate with
a standard phone plug such as a Switchcraft model 280. The
mic-level PA output is a 3-pin male XLR connector and is
wired as follows:
Pin 1 Ground
Pin 2 Signal
Pin 3 Signal