The LMC+ module is the latest incarnation of an analogue processor that started life as a very humble return talkback compressor (Listen Mic Compressor) in SSL’s earliest SL 4000 series consoles.
The SSL ‘Listen Mic’ Compressor was, throughout the 1980’s, the secret weapon in many producers’ sonic arsenal of recording techniques. Originally designed to prevent overloading the return feed from a studio communications mic, its fixed attack and release curves were eminently suitable for use on ambient drum mics. The console surgery required to gain access to the compressed output was performed on many early E Series consoles before it became a standard modification on later production systems.

This module has been specifically designed to operate in an
API 500 series rack such as the API lunchbox® or equivalent. In
common with many such modules, the nominal input/output level is
+4dBu.
Your new E Series EQ module is a re-implementation of two of the
classic SSL EQ circuits, dating back to the original E Series consoles. The module defaults to the original ‘Brown Knob’ circuit that
was standard on all early production E Series consoles but can be
switched to emulate the later ‘Black Knob’ circuit.

This module has been specifically designed to operate in a 500
format rack such as the API lunchbox® or equivalent. In common
with many such modules, the nominal input/output level is +4dBu.
The module is a stereo compressor, designed to provide flexible
control over a stereo mix. The compressor design is based around
the Bus Compressor found in the SL 4000 G Series console.