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6 English
Controls
This is a 4 channel amplifier including 2 stereo
amplifiers in a body. One amplifier is referred
to as amplifier A and the other is amplifier B.
This unit is compatible with a large variety of
systems by combining the switches and functions
described in the following.
1 Fuse (25 A x 2)
2 Battery terminal
3 Ground terminal
4 Power control terminal
Controls the unit ON/OFF.
NOTE
Controls the unit power. Be sure to connect it with
all the systems.
5 Speaker output terminals (A.ch/B.ch)
• Stereo Connections:
When you wish to use the unit as a stereo
amplifier, stereo connections are used.
The speakers to be connected should have an
impedance of 2 or greater. When multiple
speakers are to be connected, ensure that the
combined impedance is 2 or greater for each
channel.
• Bridged Connections:
When you wish to use the unit as a high-output
monaural amplifier, bridged connections are
used. (Make connections to the LEFT channel
9 and the RIGHT channel · SPEAKER OUTPUT
terminals.)
The speakers to be connected should have an
impedance of 4 or greater. When multiple
speakers are to be connected, ensure that the
combined impedance is 4 or greater.
2CAUTION
The rated input of the speakers should be no
less than the maximum output of the amplifier.
Otherwise malfunction may result.
6 LINE IN terminal (A.ch/B.ch)
7 LINE OUT terminal
These jacks output respectively the signals input
to amplifiers A and B.
They always output the stereo signals regardless
of the position of the "OPERATION" switch.
8 Power indicator
When the power is turned on, the Power indicator
lights.
If the Power indicator does not light when the
power is turned on, the protection function
may be activated. Check whether there is any
indication of trouble. (See page 2)
9 FILTER switch (A.ch)
This switch allows to apply high-pass filtering to
the speaker outputs.
• HPF (High-Pass Filter) position:
The filter outputs the band of higher frequencies
than the frequency set with the "HPF
FREQUENCY" control.
• OFF position:
The entire bandwidth is output without filtering.
0 OPERATION switch (A.ch/B.ch)
The amplification methods of the signals input to
amplifiers A and B can be selected independently
according to the setting of this switch.
• STEREO position:
The amplifier can be used as a stereo amplifier.
• MONO (Lch) position:
Amplifies the signal input from the left side
only. Set to this position and make bridged
connections to use as a high-power monaural
amplifier. (The input right signal is not output.)
! INPUT SELECTOR switch
This switch selects the input method of the
signals to be amplified by amplifiers A and B.
• A B position:
Amplifies both of the signals input to amplifiers
A and B.
• A position:
Amplifies only signal input amplifier A with both
amplifiers A and B.
@ FILTER switch (B.ch)
This switch allows to apply high-pass or low-pass
filtering to the speaker outputs.
• HPF (High-Pass Filter) position:
The filter outputs the band of higher frequencies
than the frequency set with the "HPF
FREQUENCY" control.
• OFF position:
The entire bandwidth is output without filtering.
• LPF (Low-Pass Filter) position:
The filter outputs the band of lower frequencies
than the frequency set with the "LPF
FREQUENCY" control.
The speaker output is automatically switched to
monaural (L+R).
# HPF FREQUENCY control (A.ch/B.ch)
Sets the cutoff frequency when the "FILTER"
switch is set to "HPF".
$ BASS BOOST FREQUENCY control (B.ch)
Sets the center frequency around which the low
frequency range should be boosted.
% BASS BOOST LEVEL control (B.ch)
Sets the level by which the low frequency range
should be boosted.
^ LPF FREQUENCY control (B.ch)
Sets the cutoff frequency when the "FILTER"
switch is set to "LPF".
& INPUT SENSITIVITY control (A.ch/B.ch)
Set this control according to the pre-output level
of the center unit connected with this unit.
The sensitivities of amplifiers A and B can be
adjusted independently regardless of the position
of the input selector switch.
NOTE
For the pre-output level, refer to the
<Specifications> in the instruction manual of the
center unit.
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NOTE
The control panel locates under the front side cover. Remove
the cover to access to its controls for adjustment. (See page 3)