3
3. NOMENCLATURE AND FUNCTIONS
[Front]
1. Power switch
Applies line power. Two-position push button
switch for on-off modes.
2. Input volume controls
Adjust gain of input 1 – 6 respectively.
3. Master volume controls
Adjust overall gain of unit.
4. Modules (optional)
Select appropriate modules according to the
application.
5. Compressor control (limiter)
Setting the control switch to OFF position
bypasses the compressor circuit and turning it
clockwise will reduce the limiter level (will limit the
output).
6. Equalizer switch
Place this switch in the IN position to activate an
equalizer.
7. High-pass filter switch
Place this switch in the ON position to cut off
unnecessary low frequency.
8. Low-pass filter switch
Place this switch in the ON position to cut off
unnecessary high frequency.
9. Equalizer controls
9 band filters. 12 dB boots and cut at each center
frequency.
10. Power indicator
Comes on when power is switched on.
11. Peak indicator
Comes on when the output signal reaches the
rated output power level.
12. Output fuse
Prevents excessive current flow.
W-906A: 250 V, 6 A
W-912A: 250 V, 10 A
13. AC fuse
Prevents excessive current flow.
W-906A: 250 V, 3 A
W-912A: 250 V, 5 A
14. Blank panel (user's space)
The space of 103 (w) x 63 (h) x 95 (d) mm is
provided. An optional expanding kit may be
loaded in this space.
15. Equalizer security cover
Prevents inadvertent changes of the equalizer
controls set at proper level.
16. Key-locked door
Prevents tampering.
INPUT 1
POWER
ON 250V 3A 250V 6A
OFF
OFF MAX
INPUT 2 INPUT 3
AC FUSE
OFF ON
LOW PASS
OFF ON
HIGH PASS
OUT
63 125 250 500 1k 2 k 4k 8k 16k
63 125 250 500 1k 2 k 4k 8k 16k
IN
EQUALIZER
OUTPUT FUSE COMPRESSOR
INPUT 4 INPUT 5 INPUT 6 MASTER
12
6
0
6
12
12
6
0
6
12
OFF ON
LOW PASS
OFF ON
HIGH PASS
OUT
63 125 250 500 1k 2k 4k 8 k 16k
63 125 250 500 1k 2k 4k 8 k 16k
IN
EQUALIZER
12
6
0
6
12
12
6
0
6
12
900 SERIES
WALL AMPLIFIER
POWER PEAK
1
2
4
10
11
12
13
15
Equalizer Section
3
14
16
5
6 7 8
Equalizer Section