Crate Amplifiers CA112D - Manual (Page 5)

On the
Rear Panel: The DSP
Section:
Return Send Low Z
Bal.
Gnd
Lift
High Z
Bal.
Reverb/
Chorus
Line Outputs Tweeter Effects
Loop
Foot
Switch
Level
0 10
Level
-50dB 0dB
-6dB
35 34 32 31 30 27 28 33
27: Footswitch. Connect the supplied two-button footswitch here for
remote on/off control of the internal reverb and chorus. (When connect-
ed, the footswitch overrides the front panel chorus on/off switch.)
Note: This is a STEREO jack: tip controls the chorus, ring controls the
reverb, sleeve is ground. Use only a footswitch equipped with a stereo
1/4” plug.
28: Effects Loop Send. When using an external signal processor, connect
this jack to the input of the effect by means of a shielded signal cable.
29: Effects Loop Return. When using an external signal processor, connect
this jack to the output of the effect by means of a shielded signal cable.
30: High Z Bal. Use this jack to connect a high impedance, line level signal
to a house sound board, a recording console or an external power ampli-
fier by means of an 1/4” stereo plug-terminated cable. (Ring is signal +,
tip is signal -, and sleeve is ground.)
31: Low Z Bal. Use this jack to connect a low impedance, line level signal to
a house sound board, a recording console or an external power amplifi-
er by means of an XLR-terminated cable. (Pin 1 is ground, pin 2 is signal
+, and pin 3 is signal -.)
32: Ground Lift. This switch, when depressed, electronically disconnects
the low Z balanced output jack’s chassis ground connection. If you expe-
rience excessive noise when using the low Z balanced output jack,
depress this switch.
33: Line Out Level. Use this control to adjust the output level of the line out
signal. (This control works independently from the amplifier’s master
level control.)
34: Tweeter Level. Use this control to adust the signal output level from the
CA112D’s internal tweeter. Rotating this control counter-clockwise
reduces the tweeter’s output level.
Not Shown:
Power cord. Connect the end of this cord to a suitable source of line volt-
age. Refer to the voltage information on the back of the amplifier for its
voltage and current requirements.
Note: This is a grounded plug. To avoid the possibility of electric shock,
DO NOT defeat the ground connection in any way!
The CA112D features Crate’s On-Board Digital Signal Processing
(DSP) technology that was designed specifically for use with acoustic
instruments and vocals. This provides a large selection of digital
reverbs, effects and delays. Select the type of effect desired by rotating
the Mode control (#22). This control is divided into five sections: Small
Area Reverbs (SAR), Large Area Reverbs (LAR), Special Reverbs
(SPR), Delays (DLY) and Multiple Effects (Multi).
CA112D Block Diagram:
effects line out
master instrument
channel
input
aux channel
active piezo
freq cut
filter
gain low mid cntr
peak
high
rev/
effect
send
vocal/aux
channel
low-z
input
hi-z
input
phantom
power
tones
80 330 1k
Hz
4k 10k
level
graphic EQ
rev/
effect
send
hi-z
input
gain
gain
effect
return
effect
return
master
level
50w
25w
high pass
hi freq
driver
dual
voice coil
low freq
driver
reverb
return
effects
send
low-z
bal.
gnd
lift
hi-z
bal.
level
line out
rev/
effect
send
50w
depth rate
chorus
on off
low pass
foot
switch
DSP
mode
The following chart provides a list of the DSP settings along with a brief
description of each effect.
SAR: Small Room 8’ x 8’ empty room w/hardwood floor
Small Rehearsal Hall 20’ x 40’ hall, wood floors, hard walls
LAR: Large Hall 50’ x 100’ hall, about 50 persons
Concert Hall 5000-seat hall, full crowd
SPR: Plate Reverb Simulates studio steel plate reverb
Spring Reverb Simulates multi-spring reverb tank
DLY: Slapback, short 125ms delay + reverb
Slapback, Med-short 240ms delay + reverb
Slapback, Medium 350ms delay + reverb
Slapback, Long 557ms delay - 630’ travel time
Multi: Short Med. Surface 280ms delay w/21.8% regen + reverb
Medium Hard Surface 335ms delay w/26.5% regen + reverb
Chor-Delay 400ms delay with modulation
Chor-Verb Hall reverb w/modulated pre-delay
Slap-Verb Medium hall w/200ms pre-delay
Instrument Doubler Simulates second track slightly out-of-sync
SPR
LAR
SAR
DLY
Multi
Mode