DSP STEREO EFFECTS - CONTROLS
REVERB/DELAY (FIG. A): Select from 5 TYPES of effects with the TYPE knob : DELAY/REVERB - A blend of delay and reverb DELAY - A multi-tap digital delay ROOM - A simulation of medium-size room acoustics HALL - A simulation of large-size hall acoustics PLATE - A simulation of studio plate reverb A range of preset REVERB/DELAY RATES can be selected within each TYPE (numbered in sets, FIG. A). The preset RATES get slower going clockwise within that TYPE (direction of arrows, FIG. A). For instance, presets numbered 1 in FIG. A, will have the fastest REVERB/DELAY RATES.

FIG. A

CHORUS/MODULATION (FIG. B): Select from 3 TYPES of effects with the TYPE knob: CHORUS 1 - A modern, lush chorus CHORUS 2 - A reproduction of the effect in the original Princeton Stereo Chorus amp FLANGE - An enhanced short-delay effect A range of preset CHORUS/MODULATION sweep DEPTHS can be selected within each TYPE (numbered in sets, FIG. B). The preset sweep DEPTHS get deeper going clockwise within that TYPE (direction of arrows, FIG. B). For instance, presets numbered 1 in FIG. B, will have the shallowest CHORUS/MODULATION sweep DEPTHS.
CHORUS/MODULATION (FIG. C): Adjust the sweep RATE with the RATE knob. The sweep RATES get faster going clockwise (direction of arrow in FIG. C). For instance, the RATE numbered 1 in FIG. C is the slowest sweep RATE.

FIG. B

FIG. C
PRINCETON CHORUS DSP - FRONT PANEL
A. INPUT 1 - A high-impedance plug-in connec tion for guitars or other instruments. B. INPUT 2 - A lower-impedance plug-in connection for guitars or other instruments with active pre-amps. NOTE: Both inputs have identical impedance when used simultaneously.
N. DEFEAT - Mutes the REVERB/DELAY type DSP Effects when this switch is pressed IN. This switch must be OUT to enable remote switching from the FOOTSWITCH. O. LEVEL Adjusts the amount of REVERB/DELAY type DSP Effects to be mixed in with the original dry signal. P. TYPE - This control selects one of sixteen various REVERB/DELAY DSP Effects. The {N}DEFEAT switch must be OUT, the {O}LEVEL control must be above 1, and REVERB/DELAY on the remote FOOTSWITCH (if used) must be active for this DSP Effect to be heard. NOTE: See DSP STEREO EFFECTS - CONTROLS, page 5. Q. DEFEAT - Mutes the CHORUS/MODULATION type DSP Effects when this switch is pressed IN. This switch must be OUT to enable remote switching from the FOOTSWITCH. R. LEVEL Adjusts the amount of CHORUS/MODULATION type DSP Effects to be mixed in with the original dry signal. S. TYPE - This control selects one of sixteen various CHORUS/MODULATION DSP Effects. The {Q}DEFEAT switch must be OUT, the {R}LEVEL control must be above 1, and CHORUS/MODULATION on the remote FOOTSWITCH (if used) must be active for this DSP Effect to be heard. NOTE: See DSP STEREO EFFECTS - CONTROLS, page 5. T. RATE - Adjusts the sweep rate of CHORUS/MODULATION type DSP Effects. A lower number corresponds to a slower rate of sweep. U. DSP PEAK - Flashing of this LED indicates possible clipping (distortion) in either of the DSP Effects circuits. Periodic flashing is normal. If the LED stays on and undesirable distortion is heard, try reducing: {O}LEVEL, {R}LEVEL or the amplifier VOLUME controls. V. POWER INDICATOR - This LED illuminates when the amplifier is ON. W. POWER SWITCH - Press IN the bottom of this switch to turn the amplifier ON. Press IN the top of this switch to turn the amplifier OFF.

C. VOLUME - Adjusts the overall loudness of the amplifier when the Overdrive Mode is not selected ( {I}DRIVE SELECT switch OUT ). NOTE: The Overdrive Mode must be selected ( {I}DRIVE SELECT switch IN ) for controls {D}GAIN through {J}VOLUME to function.
D. GAIN - Adjusts the amount of pre-amp gain (distortion). Use with {J}VOLUME to control the overall amplifier loudness. E. MID BOOST - Activates a special pre-emphasis filter which accentuates mid-range frequencies when this switch is pressed IN. F. LIMITER - Adjusts the amount of compression at high {D}GAIN settings. The compression is activated by distortion in the pre-amp, therefore is not as noticeable at low {D}GAIN settings.
G. OVERDRIVE INDICATOR - This LED illuminates when the amplifier is in the Overdrive Mode. H. PRESENCE - Adjusts the the post-distortion ultra-high frequency range. I. DRIVE SELECT - Activates the Overdrive Mode when this switch is pressed IN. NOTE: Both {C}VOLUME and the ChannelSelect FOOTSWITCH are disabled when this switch is pressed IN.
J. VOLUME - Adjusts the post-distortion volume. Use with {D}GAIN to control overall amplifier loudness. K. TREBLE - Adjusts the high-frequency range. L. MID - Adjusts the mid-frequency range. M. BASS - Adjusts the low-frequency range.
PRINCETON CHORUS DSP - REAR PANEL

PRINCETON CHORUS DSP

A PRODUCT OF:
A. IEC LINE CORD CONNECTOR - The line cord must be connected to a grounded AC receptacle in accordance with the voltage and frequency ratings as shown on the rear panel of the amplifier ( {B}INPUT POWER ). C. FOOTSWITCH - Plug-in connection for the FOOTSWITCH (P/N 0055592000) for remote switching of the Overdrive Mode, and both DSP Effects circuits. NOTE: For proper operation of the FOOTSWITCH, the DRIVE SELECT switch and both DSP Effects DEFEAT switches on the front panel must all be OUT. (A speaker grade cord is preferable to a coax guitar cord for connecting the FOOTSWITCH.) D. EFFECTS LOOP STEREO SEND - This jack provides a line-level stereo output from the preamp and both DSP Effects circuits of the Princeton Chorus DSP. This output can be used in conjunction with the {E}STEREO RETURN as a patch point for external stereo effects devices. (See EFFECTS LOOPS - CONNECTION DIAGRAMS, page 8) The EFFECTS LOOPSSTEREO jacks are standard 1/4-inch Tip-Ring-Sleeve types, with: Left channel signal on the Tip Right channel signal on the Ring This send can also be used to feed a stereo signal to two channels of a recording or sound reinforcement mixer. Additionally this output can be used to drive another Princeton Chorus DSP as a slave amplifier. This is done by connecting a shielded stereo cord from the {D}STEREO SEND jack of the master amplifier to the {E}STEREO RETURN jack of the slave amplifier.

E. EFFECTS LOOP STEREO RETURN - This stereo jack inputs signal directly to the left and right power-amps. It automatically disconnects the pre-amp and DSP Effects circuits when used. This is useful when using the Stereo Effects Loop option, or when using the Princeton Chorus DSP as a slave amplifier for a stereo signal source. F. EFFECTS LOOP MONO SEND - This jack provides an impedance-balanced mono output signal from the pre-amp at a point before the DSP Effects circuits. This output can be used in conjunction with the {G}MONO RETURN as a patch point for external mono effects devices. (See EFFECTS LOOPS - CONNECTION DIAGRAMS, page 8) The {F}MONO SEND can also be used to send recording and sound reinforcement mixers a dry signal. Additionally this output can be used to drive another Princeton Chorus DSP as a slave amplifier. This is done by connecting a standard guitar cord from the {F}MONO SEND jack of the master amplifier to the {G}MONO RETURN jack of the slave amplifier. G. EFFECT LOOP MONO RETURN - This balanced jack inputs signal to the stereo DSP Effects circuitry, which drives the stereo poweramp section. It automatically disconnects the pre-amp signal when used. This is useful when using the Mono Effects Loop option or when using the Princeton Chorus DSP as a slave amplifier for a mono signal source. The DSP Effects are active in the slave amplifier so that a true stereo image will be generated if the DSP Effects are used. NOTE: In order to function properly, a dummy plug or an extra guitar cord must be inserted into INPUT 2 on the front panel of the slave amplifier with its VOLUME controls turned down.

FCC COMPLIANCE NOTICE

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide a reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular 7 installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that of the receiver Consult the dealer or an experienced radio/TV technician for help
EFFECTS LOOPS - CONNECTION DIAGRAMS