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PRINCETON CHORUS FRONT PANEL FUNCTIONS
A. INPUT 1-A high impedance, high sensitivity plug-in connection for instruments,
B. INPUT 2-Plug-in connection for instruments. This input exhibits a lower input impedance and sensitivity than INPUT 1
and is useful with active preamp guitars, and will provide a darker tone with passive guitars. Both inputs are identical when
used simultaneously.
C. VOLUME-Adjusts the overall loudness when not in the OVERDRIVE mode. (SEE: M. SELECT and S. FOOTSWITCH).
D. TREBLE-Adjusts the amount of boost (accentuation) or cut (attenuation) in the high frequency range.
E. MID-Adjusts the amount of boost or cut in the mid frequency range.
F. BASS-Adjusts the amount of boost or cut in the low frequency range.
G. REVERB-Adjusts the overall amount of reverberated signal mixed with the original dry signal.
H. GAIN-Adjusts the amount of preamp amplification while in the OVERDRIVE mode. Cleaner sound is achieved at lower gain
settings, high gain settings will produce more sustain and distortion. This control works in conjunction with the N.
OVERDRIVE-VOLUME control to set the overall loudness at the output.
I. MID-BOOST-Activates a special pre-emphasis filter which accentuates mid-range frequencies.
J. LIMITER-Adjusts the amount of compression at high GAIN settings. The compression is activated by distortion in
the preamp, therefore it is not as noticeable at low gain settings.
K. OVERDRIVE INDICATOR-This LED is illuminated when in the overdrive mode.
L. PRESENCE -Adjusts the amount of boost or cut in the upper high frequency range while in the OVERDRIVE mode. This
control occurs post preamp distortion and is useful in adjusting the distortion characteristic from brash, to smooth.
M. SELECT-Activates the OVERDRIVE Mode. NOTE: This switch disables the Channel Select Footswitch and the C.
VOLUME control.
N. VOLUME-Adjusts the overall loudness while in the OVERDRIVE mode.
O. RATE-Adjusts the sweep rate of the chorus generating circuitry. A lower number corresponds to a slower rate of sweep.
P. SELECT- Activates the stereo CHORUS mode. NOTE: This switch disables the Chorus Select Footswitch.
Q. DEPTH-Adjusts the intensity of the chorus effect. A lower setting will introduce a subtle yet distinct effect whereas a higher
setting will create a more dramatic effect. With both the 0. RATE and DEPTH controls set midway or higher, a variety of
vibrato/tremolo type effects can be achieved.
R. CHORUS INDICATOR-This LED is illuminated when the stereo chorus is active. The intensity of the LED is modulated
by the chorus sweep LFO to give a visual indication of the sweep rate.
S. FOOTSWITCH- Plug-in connection for remote footswitch to activate the OVERDRIVE mode and to switch the stereo
CHORUS on and off. For proper operation of the footswitch, both M. OVERDRIVE SELECT and P. CHORUS SELECT
switches should be out. NOTE: Any good quality patch cord will work with the remote footswitch, however a
speaker grade cord is preferable to a coax guitar cord when it’s available.