Crest Audio XRM - 12 owner manual XRM block diagram

p.4

+48V ON

XRM MONO INPUT MODULE

PFL

SOLO LEFT

MAIN

12 MONO INPUTS AVAILABLE

SOLO RIGHT

RIBBON

TO

CABLE

BAL XLR

-

PEAK

IN

CIRCUIT

SOLO DC

40 WAY

LINE

GAIN

HPF

LEVEL

FREQ LEVEL

FREQ LEVEL

LEVEL

MUTE

MIX SENDS 1 & 2

70Hz

M1

(MIC PAD)

10 - 70 dB

LEV / LEV

-18dB/Oct

__

MIX 1-4

LEV / PAN

M2

SPLIT

EQ ON

PRE

SWITCHING

CHAN

OUT

LF

LOW MID

HI MID

HF

FADER

FADER AMP

MIX SENDS 3 & 4

HPF

80 HZ

80 - 2 KHZ

400 - 8 KHZ

12 KHZ

LEV / LEV

M3

FOUR BAND EQ

PIN 1 LIFT

__

INPUT

+10

LEV / PAN

M4

PREAMP

SWITCHING

26dB

INPUT

PAD

SOLO

MIX SENDS 5 & 6

SIGNAL

M5

LED

TRIGGER

YES

LEV / LEV

PEAK R

PRE

__

BAL LINE IN

LEV / PAN

M6

(PFL)

SOURCE

SWITCHING

MUTE ?

SIG

NO

MIX SENDS 7 & 8

PRE

M7

G

PRE

LEV / LEV

EQ

__

INSERT

FADER

LEV / PAN

M8

SEND / RTN

POST

SWITCHING

PRE-SOURCE

FADER

PRE

BUFFER

MIX SENDS 9 & 10

FADER

LEV / LEV

M9

PRE

__

LEV / PAN

M10

REAR PANEL

INSERT

PRE-SOURCE

SWITCHING

SELECT

MIX SENDS 11 & 12

LEV / LEV

M11

__

LEV / PAN

M12

SWITCHING

+48V ON

XRM STEREO INPUT MODULE

PFL

SOLO LEFT

4 STEREO INPUTS AVAILABLE

PRE

SOLO RIGHT

FADER

BAL XLR

LINE

GAIN

TO

PEAK CIRCUIT

IN

(MIC PAD) 15 - 60 dB

MIX 1-4

SOLO DC

POST

SUM

FADER

PRE

MIX SENDS 1 & 2

LEVEL

FREQ LEVEL

FREQ LEVEL

LEVEL

MUTE

LEFT

MONO

LEV / LEV

M1

__

LEV / PAN

M2

EQ ON

SWITCHING

SPLIT

LF

LOW MID

HI MID

HF

CHAN

FADER

AMPS

OUT

80 HZ

80 - 2 KHZ

400 - 8 KHZ

12 KHZ

LEVEL

MIX SENDS 3 & 4

LEFT

				XRM MIX PAIR		ODD MIX
				1 OF 6 PAIRS SHOWN		BUS IN
			HPF
			40Hz			MIX INSERT
	ODD		-18dB/Oct
						SEND / RTN
	MIX AMP
			HPF
	AFFECTS BOTH				PRE
					FADER
	ODD & EVEN
	STEREO	LO-CUT	AFL-ODD	SIG/PK	ODD
	PAIR	ON
				LED	FADER	ODD MIX
					POST	BAL OUT
			PEAK R		FADER
CTRL TO			(AFL)		+10
INPUT SENDS
STEREO PAIR			SIG		60MM
				G
SOLO LEFT
SOLO RIGHT	SOLO
	LOGIC
	&
SOLO DC	SWITCH					EVEN MIX
						BUS IN
			AFL-EVEN
	EVEN					MIX INSERT
						SEND / RTN
	MIX AMP
			HPF
			HPF		PRE
			40Hz		FADER
			-18dB/Oct
			SIG/PK		EVEN
				LED	FADER	EVEN MIX
					POST	BAL OUT
			PEAK	R	FADER
			(AFL)		+10
			SIG	G	60MM

SOLO AND MONITOR CIRCUITS

XRM block diagram

			FOUR BAND EQ - LEFT					LEV / LEV	M3
PIN 1 LIFT						+10		__
								LEV / PAN	M4
		PRE
								SWITCHING
		EQ
BAL XLR						+10
		LF	LOW MID	HI MID	HF			MIX SENDS 5 & 6
IN	RIGHT	80 HZ	80 - 2 KHZ	400 - 8 KHZ	12 KHZ	RIGHT			M5
			FOUR BAND EQ - RIGHT					LEV / LEV
								__
								LEV / PAN	M6
								SWITCHING
		INPUT				YES		MIX SENDS 7 & 8
		PREAMP
SPLIT						PRE			M7
						SOURCE		LEV / LEV
OUT						MUTE ?		__	M8
		INPUT	SOLO			PRE		LEV / PAN
		SIGNAL	TRIGGER					SWITCHING
	26dB	LED			PRE	FADER
			PRE-AMP			NO
	PAD	PEAK R			FADER
			OUT	LEFT		LEFT		MIX SENDS 9 & 10
		(PFL)	L & R		PRE
					EQ			LEV / LEV	M9
BAL LINE IN							SUM	__
		SIG			PRE	PRE-SOURCE		LEV / PAN	M10
	26dB	G		RIGHT	FADER	BUFFERS		SWITCHING
	PAD		POST		PRE
			FADER		EQ	RIGHT		MIX SENDS 11 & 12
			L & R
						PRE-SOURCE		LEV / LEV	M11
REAR PANEL		PRE				SELECT
								__
		FADER						LEV / PAN	M12
		L & R
								SWITCHING

						+9
	SOLO					6
						3
MIX AMPS				LED		0
						-3
				METERS		6
SOLO LEFT				FOLLOW SOLO		9
						12
						15
			SOLO			18
			FEED			21
						24
SOLO RIGHT			L - R
SOLO DC SOLO
		CONTROL
		LOGIC
				SOLO		PWR
					ON		ON

MONITOR / HP

LEVEL

L

R

SPEAKER

ON

HEADPHONE

AMP

HEADPHONE JACK

MONITOR

OUT - L

MONITOR

OUT - R

GC

GAIN

P

FITTED

SOLDER

ROTARY

BICOLOR

GROUND COMP

BALANCED AMP

PANEL

LINK

BLOB

FET

ELECT

1/4” TRS

RCA

XLR

OBE

XRM BLOCK DIAGRAM

POT FADER

PAD LED LED

DRIVER

DRIVER

SWITCH

USER OPTIONS SWITCH

SWITCH

JACK

JACK

JACK

FRANK

ALL SWITCHES SHOWN IN THE UP (DESELECTED) POSITION

STANDARD OUTPUT LEVEL IS +4 dBu AT 0 VU

AMP(LIFIER) GAIN SHOWN IN DB WHEN NEEDED

PIN 2 HOT ON ALL BALANCED INPUTS AND OUTPUTS (XLR JACKS)

WHEN SHOWN: 1/4” TRS SWITCHING JACKS HAVE NORMALLY CLOSED CONTACTS

FOR UNBALANCED OPERATION:

USER OPTIONS IMPLEMENTED WITH REMOVABLE LINKS AND SOLDER BLOBS

TIE PIN 3 TO PIN 1, USE PIN 2 FOR OUTPUT, PIN 1 FOR GND

LEGENDS

DEFAULT OPTION POSITION SHOWN UNDERLINED

“Ø” SYMBOL INDICATES POLARITY REVERSE

		COMMON INPUT CIRCUITRY
ODD		COMMON
MIX BUSES		INPUT - L
1		COMMON
3		INPUT
		LEVEL
5	L
7
9
11
2
4
6
8	R	COMMON
10		INPUT - R
12
EVEN

Use 5-Pin DIN cable to

SOLO-LINK:

interconnect two Consoles

TIES SOLO AUDIO AND

SOLO-LINK CONNECTORS.

USE 5-PIN DIN CABLE FROM

SOLO

CONTROL BETWEEN

SLAVE CONSOLE OUT

LINK

CONSOLES. SLAVE SOLOS

TO MASTER CONSOLE IN

SHOW UP ON MASTER

IN

OUT

CONSOLE.

POLY

FUSES

X-RACK REAR PANEL:

SHORT-CIRCUIT

PROTECTION

AC INLET & SWITCH

ON

+17V

UNIVERSAL INPUT-VOLTAGE

-17V

POWER

SWITCHING POWER SUPPLY

+48V

ANALOG

INTERNALLY FUSED AND

GROUND

SHORT-CIRCUIT PROTECTED

+12V

AUX DC

AC IN

GROUND

100-240V

SAFETY

50 / 60 Hz

80W

GROUND

CHASSIS

TO CHASSIS

GROUND

BNC CONNECTOR FOR 12VOLT LAMP ( ON FRONT PANEL )

DC OUTPUT

TO POWER

DISTRIBUTION

RIBBONS

MIX BUSES

XRM owner’s manual

XRM BLK DIA-REV1.0 - 5/20/02