Harman-Kardon GB4 manual Rear Connector Panel, Talkback, Stereo Returns, PSU Monitor LEDs

Talkback

The talkback mic input is on the rear connector panel.

The level of the talkback mic signal is controlled by the LEVEL pot (35). The signal is the fed to all groups, aux 1-2, aux 3-4, aux 5-6 and aux 7-8 using the appropriate buttons (36).

Stereo Returns

There are two stereo return channels. The connectors are 1/4” jacks on the rear connector panel.

Each has its own level control (37), and each may be routed to the L-R main mix or to groups 1- 2 for Stereo Return 1 or to groups 3-4 for Stereo Return 2 via the appropriate switches (38).

PSU Monitor LEDs

These LEDS (39) confirm the presence of the correct voltage on the +8V and the +/-17V power rails in the console.

Rear Connector Panel

INS INS INS INS

T/B MIC

R MNTR	L	MIX C	MIX L	GRP 3	GRP 1
L	L		INS	INS	INS
		L

REC/ALT

2 TRK IN

OUT

R

RR

MIX R GRP 4 GRP 2

MTX4 MTX3 MTX2 MTX1 AUX4 AUX3 AUX2 AUX1

R STE RTN2 L R STE RTN1 L AUX8 AUX7 AUX6 AUX5

T/B MIC (3-pin female XLR)

Pin 1 Ground

Pin 2 Signal Hot

Pin 3 Signal Cold

MIX L, R & C OUTPUTS (3-pin male XLRs)

Pin 1 Chassis

Pin 2 Signal Hot

Pin 3 Gnd

GB4 User Guide 33