Yamaha P7000S - Amplifier, Руководство пользователя

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7
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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.
NOTE:
This feature provides improved frequency reponse on speakers
such as the YAMAHA S112 and S115.
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 - 3 1 j a ck
The XLR-3-31 input jacks are wired as shown below.
• Phone j a ck
Phone jacks are wired as follows.
S UB
WOOFER
LOW CUT
ON
S TEREO BRIDGE PARALLEL
INPUT
S PEAKER S
BRIDGE
OFF
OFF
1
1 +
-
+
-
+
-
+
-
2
2
1
1 +
-
+
-
S UB
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
S UB
WOOFER LOW CUT
OFF
25 Hz-150 Hz
25 Hz to 150 Hz
C u toff freq u ency
1 2
3
hot
gro u nd
cold
ring (cold)
tip (hot) s leeve
(gro u nd)