7
■
Rear Panel
1
FILTER switch and FREQUENCY adjustment knob
(One pair for each channel)
Use these controls to select the filter type and adjust the cutoff
frequency on each channel (A and B). You use the FILTER
switch to select the filter, as follows.
OFF ...................... Do not use any filter.
SUBWOOFER..... Use a low-pass filter. The amplifier outputs
the frequencies that are lower than the cut-
off set by the FREQUENCY adjustment
knob.
LOW CUT ........... Use a high-pass filter. You can use this set-
ting to filter out unneeded low or subsonic
frequencies.
If you select SUBWOOFER or LOW CUT, you can then use
the FREQUENCY adjustment knob to adjust the cutoff fre-
quency. The adjustment range is 25 Hz to 150 Hz.
NOTE:
If the amplifer is set to BRIDGE mode, only the switch and
knob for Channel A are effective. (The Channel B frequency
controls are disabled.)
2
ON/OFF switch
If you set this switch ON, the amplifier adds low-frequency
compensation so as to enhance speaker output. The results (the
actual change in the low-frequency balance) will vary accord-
ing to the speaker type. Note that this switch is effective only if
the FILTER switch is set to OFF.
3
INPUT jacks (Channels A, B)
Two jack types are provided for each channel. Note that if you
are using BRIDGE or PARALLEL mode, only the Channel A
jacks are effective.
• XLR-3-31 jack
The XLR-3-31 input jacks are wired as shown below.
• Phone jack
Phone jacks are wired as follows.
SUB
WOOFER
LOW CUT
ON
STEREO BRIDGE PARALLEL
INPUT
SPEAKERS
BRIDGE
OFF
OFF
1
1
+
-
+
-
+
-
+
-
2
2
1
1
+
-
+
-
SUB
WOOFER LOW CUT
OFF
FREQUENCY
Hz
25
150
90
50
125
FREQUENCY
1
1
2
3
3
2
LOCK
LOCK
+
+
-
-
(+)
(-)
Hz
25
150
90
50
125
1
5
4
6
2
3
SUB
WOOFER LOW CUT
OFF
25 Hz-150 Hz
Cutoff frequency
25 Hz to 150 Hz
1
2
3
hot
ground
cold
ring (cold)
tip (hot)
sleeve
(ground)
