Allen&Heath GR1 SERVICE MANUAL - Manual (Page 13)

GR1
USER GUIDE
10
LINE INPUTS
MONO AND STEREO LINE INPUTS
2 Mono and 3 stereo electronically balanced line inputs
are available on 1/4" jack sockets. The stereo inputs
provide individual sockets for left and right inputs.
OPTION LINKS - LINE INPUT LEVEL
Unbalanced sources may be plugged into these inputs.
The inputs may be individually internally set for one of
three standard operating levels by positioning the jumper
links as shown. Note that two line inputs are set on one
bank of links.
+4dBu (1.2Vrms) High level
0dBu (0.775Vrms) Line level
-10dBV (300mVrms) Low level
MONO AND STEREO AUX INPUTS
An additional 2 mono and 3 stereo unbalanced line level
AUX inputs are available on the SYS-LINK IN connec-
tor. These operate at -2dBu (600mVrms). The AUX
inputs may be used for extra line inputs switchable from
the front panel, or for expansion of the system using
SYS-LINK.
CHANNEL DIRECT OUTPUTS
Line level unbalanced Direct Outputs for each input are
available on the SYS-LINK OUT connector. These
operate at -2dBu (600mVrms). The DIR outputs may be
used to feed additional zones, monitors, recording de-
vices etc, or to expand the system using SYS-LINK.
OPTION LINKS - PRE/POST DIRECT OUTPUTS
Each DIR output may be taken from the output of the
input pre-amplifer before (pre) or after (post) the chan-
nel level control. PRE may be used to feed the channel
signals to additional GR1 units for zone expansion, or for
signal monitoring. POST may be used for recording
feeds, effects sends etc. Two channels are set on one
bank of links. Note that the inner links set PRE and the
outer links set POST.