Owner`s manual
1. Quick reference
The numbers in parentheses refer to the illustrations in this
manual. Only one channel is described, as both channels offer
exactly the same features.
Front panel
(1) 'Power On' - LED, becomes lit when the ac power has been
turned on
(2) 'Gain' - control potentiometer for input sensitivity and overall
gain
(3) LED display for remaining headroom before clipping occurs
(4) 'EQ in' switch with control LED, engages EQ circuitry when
pushed. If this switch is not activated or if the power has been
turned off, inputs and outputs of the equalizer are directly
connected for true bypass operation
(5) 'Low cut' switch with control LED, eliminates all frequencies
below 40Hz
(6) Faders to boost or cut the individual frequency bands
Back panel
(7) XLR input, balanced
(8) 1/4" instrument jack input, balanced
(9) XLR output, balanced
(10) 1/4" instrument jack output, balanced
(11) Mains power switch
(12) Fuseholder for mains fuse
(13) Mains power receptacle
owner's manual GF equalizers
13
owner`s manual GF equalizers © 1994 Zeck Audio
Power
Output
Channel 2
Input
Channel 2
Output
Channel 1
Input
Channel 1
Fuse
AVIS Risque de choc électrique - ne pas ouvrir
on
off
1 = Shield
2 = +Life
3 = –Life
3
1 2
Output
2 3 1
1 = N.C.
2 = +Life
3 = –Life
3
2 1
Input
2 3 1
This apparatus must be earthed.
To reduce the risk of fire or electric shock
do not expose this appliance to rain or moisture
No user serviceable parts inside.
Refer servicing to qualified personnel.
CAUTION
WARNING
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
!
CAUTION For continued protection against fire hazard
replace only with same type and rating of fuse
ATTENTION Afin de réduire le risque de feu remplacer
uniquement par un fusible de même type et valeur
PUSHPUSHPUSHPUSHPUSH
PUSHPUSHPUSHPUSHPUSHPUSHPUSHPUSHPUSHPUSHPUSHPUSH
PUSHPUSHPUSHPUSHPUSHPUSHPUSHPUSH
PUSH
PUSHPUSHPUSHPUSH
PUSHPUSHPUSHPUSHPUSH
PUSHPUSHPUSHPUSHPUSHPUSHPUSHPUSHPUSHPUSHPUSHPUSH
PUSHPUSHPUSHPUSHPUSHPUSHPUSHPUSH
PUSH
PUSHPUSHPUSHPUSH
77 89 10111213 109 8
Power on
EQ in Low cut
Gain
-10 +10
0
Ch 1
EQ in Low cut
Gain
-10 +10
0
Ch 2
GF 230
GF 215
Constant Q
2x15 Graphic EQ
25 31 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1k 1.25k 1.6k 2k 2.5k 3.15k 4k 5k 6.3k 8k 10k 12.5k 16k 20k
-10 +10
0
Gain
Channel 2
Power on
EQ in Low cut
-10 +10
0
Gain
Channel 1
EQ in Low cut
25 40 63 100 160 250 400 630 1k 1.6k 2.5k 4k 6.3k 10k 16k 25 40 63 100 160 250 400 630 1k 1.6k 2.5k 4k 6.3k 10k 16k
25 40 63 100 160 250 400 630 1k 1.6k 2.5k 4k 6.3k 10k 16k 25 40 63 100 160 250 400 630 1k 1.6k 2.5k 4k 6.3k 10k 16k
+12
0 dB
+6
+3
+9
- 3
- 9
- 12
- 6
Clip
3 dB
6 dB
12 dB
Signal
H
E
A
D
R
O
O
M
Constant Q
2x30 Graphic EQ
Clip
3 dB
6 dB
12 dB
Signal
H
E
A
D
R
O
O
M
Clip
3 dB
6 dB
12 dB
Signal
H
E
A
D
R
O
O
M
Clip
3 dB
6 dB
12 dB
Signal
H
E
A
D
R
O
O
M
+12
0 dB
+6
+3
+9
- 3
- 9
- 12
- 6
+12
0 dB
+6
+3
+9
- 3
- 9
- 12
- 6
R
R
1
1
2
2
2
3
2
3
3
3
4
6
4
4
4
5
5
5
6