Crate Amplifiers manual Rear Panel, DSP Section, CA112D Block Diagram, Not Shown

On the

Rear Panel:

35			34	33	32	31	30	27	28
Tweeter				Line Outputs			Effects		Foot
							Loop		Switch
-6dB
-50dB	0dB	0	10
Level		Level		Gnd	Low Z	High Z	Return	Send	Reverb/
				Lift	Bal.	Bal.			Chorus

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 DSP

Section:

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).

Mode
	DLY
SPR
LAR
SAR	Multi

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

CA112D Block Diagram:

instrument
channel
input		filter		tones
				rev/
				effect
active	piezo			send
		freq cut	gain	low mid cntr high

peak

master

effects	line out
	chorus
	depth rate	on

effects	mode
send
off
	DSP

foot

switch

reverb return

vocal/aux

phantom power

rev/

channel

low-z input

hi-z input

aux channel

hi-z input

gain

effect

send

effect return

effect return

rev/

effect

send

line out

hi-z

bal.

level

gnd

lift

low-z bal.

graphic EQ

master 80 330 1k 4k 10k

levelHz

high pass	25w
	level
low pass	50w
	50w

hi freq driver

dual

voice coil

low freq

driver

gain