THRESHOLD:The amount of compression is adjustable over
a wide range of signal levels (off to -20dB), to allow compression
of +4dBu and -10 dBV source material.
RATIO: The compression ratio is continuously variable
from light compression to limiting (1.5:1 to 15:1).
OUTPUT: The tube line stage will supply up to +20dB
of gain make-up after compression.
METER: The VU meter can indicate input level, output
level, or gain reduction. Input and output levels are referenced
to +4dBu. The meter Zero trim for gain reduction is located below
the selector switch.
IN/BYPASS: 'Hard' bypass switches for comparing the
processed sound directly with the original source.
LINK/SPLIT: Links the two channels for stereo operation.
When linked, the threshold and dynamics processing (fast, preset
and manual modes) are controlled entirely by Channel 1. The ratio
and output controls for the two channels should be set to the
MODE: Selects the three sidechain operating modes for
FAST: The optical element operates with very fast attack
and release times, which are peak-averaged by the rapid operation
of the optical cell.
Presets: These six attack/release time settings are
identical to the presets on the classic Fairchild 670 limiter.
Presets 5 and 6 are program-dependent.
Manual: The attack and release times are continuously
variable from 1-40ms and 0.1-2s respectively.
SIDECHAIN INSERTS: TRS 1/4" jacks for inserting
an outboard EQ into the sidechain. Use for frequency-dependent
compression or de-essing. Tip is send, and Ring is return. In
Link mode, both inserts are active.
INPUTS and OUTPUTS: The XLR and 1/4" connectors
for each channel are wired in parallel. Pin 2 (Tip) is positive
phase and Pin 3 (Ring) is negative phase. Input impedance is
10kohms. Output impedance is 600 ohms.