Controls

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25

25

NOTE

The control panel locates under the front side cover. Remove the cover to access to its controls for adjustment. (See page 3)

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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.

1Fuse (25 A x 2)2Battery terminal3Ground terminal4Power control terminal

Controls the unit ON/OFF.

NOTE

Controls the unit power. Be sure to connect it with all the systems.

5Speaker 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 2Ω or greater. When multiple speakers are to be connected, ensure that the combined impedance is 2Ω 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 4Ω or greater. When multiple speakers are to be connected, ensure that the combined impedance is 4Ω or greater.

2CAUTION

The rated input of the speakers should be no less than the maximum output of the amplifier. Otherwise malfunction may result.

7LINE 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.

8Power 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)

9FILTER 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.

0OPERATION 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.

@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.

6 LINE IN terminal (A.ch/B.ch)• A position:

 

Amplifies only signal input amplifier A with both

 

amplifiers A and B.

6English