Summit Audio MPC-100A Mic Preamp Compressor - Manual (Page 8)

Further Notes……
Linking: use a 1/4" mono patch cord with tip~signal and sleeve~ground; the MPC-
100A which is set for more compression will act as the master controller for both units;
slope and threshold are the only controls effected [note: an MPC-100A can also be linked
to a TLA-100A]
Side Chain Insertion: use a 1/4" stereo patch cord with tip~send, ring~return, and
sleeve~ground; to execute "ducking" (compression of principle audio signal, triggered
by an external audio signal) tie tip and sleeve to ground, and bring the triggering signal in
on the ring; to execute "de-essing" (engaging a frequency dependence in the compression
of the principle signal) send to the outboard equalizer on the tip, return from the EQ to
the compressor on the ring and tie the sleeve to ground - then boost the frequency you
want to compress and roll off the frequencies you want uncompressed; this can be
particularly useful in removing sibilance from vocal tracks.
Sleeve Ring Tip
Side Chain connections are unbalanced
Unbalanced Connection: to go into the line input XLR jack of the MPC-100A
unbalanced, it is necessary to connect the signal to pin 3 and tie pin 2 and pin 1 to
ground; unbalanced out has its own dedicated 1/4" mono jack
Tonality: because there are two stages of vacuum tube gain in the MPC-100A as well as
a discrete, solid state gain stage, the range of tonality in the unit is significantly wide; we
recommend that you experiment with moderately overdriving either or both of the tubes
and compensating for desired output level using the discrete gain control; be aware that
when one of the yellow LED's comes on, it is indicating that the signal is reaching soft
clipping "saturation" in the vacuum tube; for the most transparent signal tone set the solid
state gain to maximum and adjust the tube gains only as high as your necessary output
level requires.
Ground
Side Chain EQ
Input Output