Owner`s manual

page 4
Features
• Elegantly simple, purist feedback design optical compressor for signal leveling with a minimum of
sonic artifacts
• Subtle dynamic control to heavy compression, the sonic character of the source remains intact
• Comprehensive control set includes input level, threshold, attack, release, ratio and makeup gain
• Bright, easy to read 10 segment LED gain reduction meters
• Bi-color output peak LED lights green with signal present and red 6dB before clipping
• Pin 7 & 9 connections to Radial Workhorse™ and Purple Sweet Ten™ auxiliary connectors
• Pin 11 unbalanced audio out connection to Radial Workhorse™ BussFeed
• Five year transferable warranty on parts and labor
• Made in the USA
Front Panel Controls / Features
COMP IN SWITCH - This switch
activates the compressor circuitry.
INPUT - This switch selects between
three input levels: -10dB, 0dB, and
+10dB.
LINK - This switch is to activate either
a) linking of two m502’s for use in
stereo compression scenarios, or b) to
activate external side chain control of
the compressor for ducking, de-essing
etc.
GR METER - This 10 segment meter
displays the amount of gain reduction
being applied to a signal in the
compression circuit.
PEAK INDICATOR - The LED peak
indicator, which monitors the signal
at the output of the compressor,
illuminates green at -10dBu and red at
+20dBu (6dB before clipping).
THRESHOLD - This knob sets the
minimum level at which the
compressor circuit is activated, with a
range of +15dB to -15dB.
ATTACK (milliseconds) - This knob sets
how quickly (or slowly) the compressor
circuit attenuates the incoming signal.
RELEASE (seconds) - This knob sets
how quickly (or slowly) the compressor
circuit releases its attenuation of the
incoming signal.
RATIO - The ratio control determines
the input/output ratio for signals
above the threshold level. Higher
ratios result in more aggressive gain
reduction while lower ratios will result
in more gentle gain reduction.
OUTPUT - The output control provides
20dB of variable level control at the
output of the m502, from -10dB to
+10dB. This control is useful for small
level adjustments during tracking or
for compression gain makeup.