Manual Allen-Heath GL2200 (page 12 of 28) (English)

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GL2200 USER GUIDE

The 2 mid frequency bands MF1 and MF2 can be swept across a wide frequency

range to tune into the exact frequency required; useful for getting the best out of

microphones or for tuning out troublesome feedback. The mid bands are

overlapping with a Q of 1.6 and can boost or cut in excess of +/- 15dB. The centre

flat position is detented for quick resetting.

Press EQ IN to switch the EQ into the signal path.

6 AUX SENDS provide feeds for foldback monitors and effects. Aux 1-4 and Aux

5-6 may be set to pre or post-fader using the PRE switch.

Monitor sends to the performers are usually set pre-fade (PRE), although some

sources such as radio mics are often set post-fade to avoid ‘dressing room’ talk

spill.

Effects sends to external signal processing equipment such as reverb and delay

effects units, are usually set post-fade so that the amount of effect (wet signal) is

always relative to the position of the fader (dry signal).

Adjust the amount of effect required for each channel using its AUX control.

The effect is returned to the mix through another channel, usually the stereo

return described later in this guide.

POST-FADE sends are post-EQ, post-mute

. PRE-FADE sends are set post-EQ,

post-mute as standard. Internal link options are available to change the source of

the pre-fade sends. Refer to the internal link options section in this user guide.

Note; AUX 1-6 feed XLR outputs with inserts when the GRP/AUX REVERSE

switches are pressed in the master section.

PAN positions the channel signal within the stereo image or between L-R and the

groups when the routing switches are selected. The centre position is detented for

quick resetting.

MUTE switches the signal off when pressed regardless of fader position. Muted

channels are indicated by red LEDs. The channel meter continues to indicate pre-

fader channel activity.

A 4 LED CHANNEL METER shows signal activity at all times. The green SIG

LED indicates signals greater than -20dBu, yellow ‘0’ and ‘+6’ represents normal

operating level, and red PEAK warns of potential overload 5dB before clipping.

Set the channel signal so that the meter averages between ‘0’ and ‘+6’. Back the

gain off if the red peak LED flashes.

Pressing PFL lets you listen to the channel pre-fader signal on headphones

without interrupting the main console outputs. The signal level is shown on the L-

R bargraph meters. In this way each sound can be correctly lined up and checked

at any time.

L-R, 1-2, 3-4 routing switches feed the channel signal to the L-R mix and groups

1-2, 3-4. Use the pan control to route to individual groups, i.e. left to route to L, 1,

3 and right to route to R, 2, 4. In this way subgroups may be set up in mono or

stereo to feed the main L-R mix.

A 100mm FADER provides +10dB boost above the normal ‘0’ operating level. All

post-fade aux send levels are dependent on the level of the fader.

MF1 EQ

MF2 EQ

1-2

3-4

PEAK

L-R

PFL

SIG

ODD

AUX

EVEN

MUTE

EQ IN

100Hz

12kHz

-15

+15

500Hz

3kHz

15kHz

-15

+15

MF1

250Hz

35Hz

1kHz

-15 +15

MF2

-15 +15

60Hz

PRE

PAN

OO +6

48V

PRE

20- 10

PAD

GAIN

PAD

-30dB

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Allen-Heath GL2200 Manual

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