TCL-2
TCL-2 FRONT PANEL
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1) THRESHOLD CONTROL “THRESHOLD”
Conductive plastic rotary potentiometer offering variable compression threshold. When fully
CCW, the compression threshold is least sensitive. Threshold range is approximately -20 dB to
+20 dB. Threshold is most sensitive when control is turned fully CW.
(2) ATTACK CONTROL “ATTACK”
Conductive plastic rotary potentiometer offering variable attack timing. When fully CCW the
fastest attack is achieved (2mS). When fully CW the slowest attack is achieved (lOOmS).
(3) RELEASE CONTROL “RELEASE”
Conductive plastic rotary potentiometer offering variable compression release timing. When fully
CCW the fastest release is achieved (lOOmS). When fully CW the slowest release is achieved (3
seconds).
(4) RATIO CONTROL “RATIO”
Conductive plastic rotary potentiometer offering variable compression ratio. When fully CCW
the lowest and most gentle ratio is achieved (1.4:1). When fully CW the highest and most pro-
nounced ratio is achieved (30:1). A compression ratio of approximately 10:1 (or higher) is typi-
cally called “limiting.” All TCL-2 controls are available optionally with “detented” action, offer-
ing loggable resetability for mastering recall. Contact the factory for details.
(5) CHANNEL IN SWITCH “CH IN”
Pushbutton switch which selects channel status. When switch is depressed and corresponding
LED is illuminated, audio signal will be processed by dynamics functions. When switch is not
depressed and LED is not illuminated, audio signal is not processed by dynamics functions. This
is not a “hard-wire” bypass. Audio signal is always in the active circuit path regardless of this
switch’s status.
(6) METER FUNCTION SELECT SWITCH “METER ON=GR”
Pushbutton switch which selects meter function. When switch is depressed and corresponding
LED is illuminated, meter indicates the amount of gain reduction. When switch is not depressed
and LED is not illuminated, meter indicates output level (0 VU = +4 dBu).
(7) TWIN TOPOLOGY SELECT SWITCH “TT”
Pushbutton switch which selects the corresponding channel as a complete vacuum tube compres-
sor or a complete solid state compressor. Not a gimmick. Twin Topology is designed around
two world-class, musically optimized Class-A amplifiers — one amplifier is based on twin triode
vacuum tubes, while the other is based upon all discrete J-FET servo amplifiers. Like having two
distinctly different compressors in one chassis. When switch is depressed and LED is illuminated,
the channel is operating as a solid state compressor. When the switch is not depressed, the chan-
nel is operating as a vacuum tube compressor. Because of the TCL-2’s unique shunt design, the
dynamic processing chain leaves little or no detectable signal path artifact when in-circuit.
