Fender Princeton Chorus DSP User manual

ENGLISH - PAGES 4-9
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3

Based on the classic design
of the original Fender Princeton
Ste re o Cho rus ™ a m pl if ier, the
Princeton Chorus DSP is updated
with Digital Sig na l Pro c e s s i n g .
De v el o pe d in F e nd e r ’s o wn
Digital Laboratory, the Pr inceton
Chorus DSP features 32 studio-
quality Stereo Effects that utilize
t wi n p ow e r-a mpl if i er s to maintain
total s t e re o - s e p a r a t i o n . A selec-
table Overdrive Mode makes this
virtually a two-channel amplifier!
Th e O ve rd riv e Mo de fea tu re s
e x clu siv e F e n de r Pre - & D e-
Emp ha s is Dis tor ti on Ci rc uit ry
t hat p rod uces th e s e a r i n g
s m oo th h i g hs and d e e p p u n ch
like that of an overdriven stack
tube-amplifier.
The MID BOOST switch provides
another p r e- em p ha s i s v o i ce while
t he P RE S EN C E c on tr o l gi v es
continuous variation of the high-
fre q ue n c y c onte n t i n th e d e -
emphasis voicing. Three-Band
Eq ual iz ati on Ci rcu itr y located
p o s t - d i s t o rt i o n , serves to further
modify the overall sound of the
amplifier.
A unique LIMITER control is d is-
t o rt i o n - a c t i v a t e d and sets exact
limits to distortion without losing
the sustain usually produced by
high GAIN settings. A dynamic
effect can be achieved with both
the LIMITER and GAIN at high
settings; the harder the guitar is
p ick ed , t h e c l e a n e r t h e n ot e
becomes! H a rm o n i c - c o n t e n t will
also increase as the notes are
allowed to sustain.
The included 3-Button FOOTSWITCH
allows re mo te sw i tc h in g of the
Overdrive Mode and DSP Stereo
Effects. M u lt ip l ex e d over a stan-
dard 1 / 4- i nc h p a tc h co r d, th e
FOOTSWITCH is easily connect-
ed to remote pedal-boards.
The versatility of the Princeton
Chorus DSP is greatly expanded
with True-Stereo and Balanced-
M on o E FF E C TS LO OP S w h ic h
enable connection to a wide vari-
et y of equ ip m ent inc lud ing
re c o rd i n g / s o u n d - re i n f o rc e m e n t
m ixer s, slav e a m pl i fier s an d
effects devices.
4
PRINCETON CHORUS DSP - FEATURES

• 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 with-
in 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
DSP STEREO EFFECTS - CONTROLS
5

A. INPUT 1 - A high-impedance plug-in connec-
tion for guitars or other instruments.
B. INPUT 2 - A lower-impedance plug-in con-
nection for guitars or other instruments with
active pre-amps.
• NOTE: Both inputs have identical impedance
when used simultaneously.
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 select-
ed ( {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-empha-
sis filter which accentuates mid-range fre-
quencies when this switch is pressed IN.
F. LIMITER - Adjusts the amount of compres-
sion at high {D}GAIN settings. The compres-
sion is activated by distortion in the pre-amp,
therefore is not as noticeable at low {D}GAIN
settings.
G. OVERDRIVE INDICATOR - This LED illumi-
nates 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 Channel-
Select FOOTSWITCH are disabled when this
switch is pressed IN.
J. VOLUME - Adjusts the post-distortion vol-
ume. 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.
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 var-
ious REVERB/DELAY DSP Effects. The
{N}DEFEATswitch 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 var-
ious 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 nor-
mal. If the LED stays on and undesirable dis-
tortion 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.
6
PRINCETON CHORUS DSP - FRONT PANEL

PRINCETON CHORUS DSP - REAR PANEL
FCC COMPLIANCE NOTICE
A PRODUCT OF:
PRINCETON CHORUS DSP
A. IEC LINE CORD CONNECTOR - The line cord
must be connected to a grounded AC recepta-
cle in accordance with the voltage and frequen-
cy 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 opera-
tion 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 pre-
amp 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 DIA-
GRAMS,” page 8) The EFFECTS LOOPS-
STEREO 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 sig-
nal 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 con-
necting a shielded stereo cord from the
{D}STEREO SEND jack of the master ampli-
fier 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 pro-
vides an impedance-balanced mono output sig-
nal from the pre-amp at a point before the DSP
Effects circuits. This output can be used in con-
junction with the {G}MONO RETURN as a
patch point for external mono effects devices.
(See “EFFECTS LOOPS - CONNECTION DIA-
GRAMS,” page 8) The {F}MONO SEND can
also be used to send recording and sound rein-
forcement 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 bal-
anced jack inputs signal to the stereo DSP
Effects circuitry, which drives the stereo power-
amp 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.
7
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 rea-
sonable protection against harmful interference in a residen-
tial 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
installation. If this equipment does cause harmful interfer-
ence to radio or television reception, which can be deter-
mined 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 receiv-
ing antenna •Increase the separation between the equip-
ment and receiver •Connect the equipment into an outlet on
a circuit different from that of the receiver •Consult the deal-
er or an experienced radio/TV technician for help

EFFECTS LOOPS - CONNECTION DIAGRAMS
8

PRINCETON CHORUS DSP - SPECIFICATIONS
9
TYPE: PR 424
PART NUMBER: 022-5700-020 (120V)
022-5730-020 (240V) Aust
022-5740-020 (230V) UK
022-5760-020 (230V) Eur
022-5770-020 (100V)
POWER REQUIREMENTS: 100V AC, 50/60 Hz: 180W
120V AC, 60 Hz: 180W
230V AC, 50 Hz: 180W
240V AC, 50 Hz: 180W
POWER AMP POWER OUTPUT: 25W per channel, (50W Total) @ 5% THD
RATED LOAD IMPEDANCE: 8Ωper channel
SENSITIVITY: 1.4V RMS
PREAMP INPUT IMPEDANCE: INPUT 1: >1MΩ/ INPUT 2: >130kΩ
NOMINAL LEVEL: INPUT 1: 100mV / INPUT 2: 200mV
MONO EFFECTS LOOP: NOMINAL LEVEL: -10dBv
SEND OUTPUT IMPEDANCE: 1kΩ(Balanced)
RETURN INPUT IMPEDANCE: 22kΩ(Balanced)
STEREO EFFECTS LOOP: NOMINAL LEVEL: -10dBv
SEND OUTPUT IMPEDANCE: 1kΩ
RETURN INPUT IMPEDANCE: 18kΩ
(Specifications for each channel:
Left on Tip, Right on Ring)
_____________________________________________________________________________
SPEAKER COMPLEMENT: TWO FENDER SPECIAL DESIGN
10”, 8ΩSPEAKERS (P/N 0029753000)
DIMENSIONS: HEIGHT: 17 1/2 in 44 cm
WIDTH: 22 3/8 in 57 cm
DEPTH: 10 3/16 in 26 cm
WEIGHT: 40 lb 18 kg
Fender®, Tone-Master®, and Princeton Chorus® are
registered trademarks of FMIC
Product specifications are subject to change without notice

Basado en el diseño clásico del
amplificador [Fender Princeton
Stereo Chorus TM] original,
[Princeton Chorus DSP] se ha actual-
izado con [Digital Signal Processing]
procesamiento de señal digital.
Desarrollado en el propio laboratorio
digital de [Fender], [Princeton
Chorus DSP] dispone de 32 efectos
estéreo con calidad de estudio que
utilizan amplificadores de ali-
mentación doble que permiten con-
servar una total separación estéreo.
La posibilidad de seleccionar el
modo Overdrive lo convierte prácti-
camente en un amplificador de dos
canales. El modo Overdrive dispone
de un sistema de circuitos de distor-
sión de preacentuación y desacen-
tuación exclusivo de Fender que
genera marcados altos suaves y gran
fuerza como si se tratase de un
amplificador distorsionado de tubo
apilado.
El conmutador [MID BOOST]
AUMENTAR MEDIOS proporciona
otra voz de preacentuación mientras
que el control [PRESENCE] PRESEN-
CIA aporta una variación continua
del contenido de alta frecuencia de
la voz de desacentuación. El sis-
tema de circuitos de ecualización a
tres bandas establecido después de
la distorsión, permite modificar pos-
teriormente el sonido global del
amplificador. Existe un único control
[LIMITER] LIMITADOR que se activa
con la distorsión e impone a ésta
límites exactos sin perder el apoyo
que suele ofrecer una configuración
[GAIN] GANANCIA alta. Se puede
lograr un efecto dinámico si [LIM-
ITER] LIMITADOR y [GAIN] GANAN-
CIA tienen un valor alto; cuanto más
fuerte se toque la guitarra con la
púa, más limpia sonará la nota. El
contenido armónico también aumen-
tará a medida que las notas se man-
tengan.
El [FOOTSWITCH] CONMUTADOR
DE PEDAL de 3 botones que se
incluye permite activar o desactivar
de forma remota el modo Overdrive y
los efectos estéreo [DSP].
Multiplexado mediante un cordón de
1/4 de pulgada, el [FOOTSWITCH]
CONMUTADOR DE PEDAL se puede
conectar fácilmente a paneles de
pedal remotos.
La versatilidad de [Princeton Chorus
DSP] se puede expandir en gran
medida mediante [EFFECTS LOOPS]
BUCLES DE EFECTOS mono con
balance y estéreo real que permiten
la conexión con gran variedad de
equipos, entre los que se incluyen
los mezcladores para reforzar el
sonido y grabación, los amplifi-
cadores secundarios y los disposi-
tivos de efectos.
PRINCETON CHORUS DSP - FUNCIONES
10