Audioplex OPT-4-70 설치 매뉴얼

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INSTALLING AND USING YOUR OPT-4-70 SPEAKER CONTROL

Your OPT-4-70 Speaker Selector-Volume Control is designed to operate with up to 4 pairs of

loudspeakers. It can be used with one or two stereo amplifiers, or with 4 Channels of a surround-sound

type sound system. Each of the 4 output control channels can be individually switched to the amplifier

connected to A AMPLIFIER INPUT, or one connected to the B INPUT (if any). Thus it is convenient to

listen to different program material in different rooms, swap front and rear channels in a surround-sound

system, etc. Both the A and B amplifier inputs are identical, and completely independent of each other .

Other OPT-4 features include power handling capability of up to 25 Watts RMS continuous (72 Watts

audio). The LEFT and RIGHT channels are completely separate to assure safe operation with all types of

amplifiers, including those with "bridging" outputs. The volume attenuators are tapped auto-transformer

type with attenuation of 3 dB/step except for the last 2, which are 4 and 6 dB. These controls do not heat

up in operation, nor do they deteriorate over long time use.

Connections to amplifiers and speakers are illustrated in the back of these instructions. Remember that

the LEFT and RIGHT circuits are separate, so connections must be made correctly or the system will not

operate properly.

Heavy duty screw terminal connections are provided on the rear panel to insure positive, long lasting

connections. They will accept 12 gauge wire easily. To make connections, strip about 3/8" of insulation

from the wire end. Make sure no loose ends stick out to cause problems. Check that the bare wire is

connected to the hole, not the insulation.

If only one amplifier is to be used, connect it to the AMPLIFIER "A" terminals as shown. Make sure

the + and -, and L and R channel connections are correct to avoid unsatisfactory operation or dead

channels. The same precautions should be used when connecting the speakers, crossed channels, polarity ,

or grounds will result in improper operation.

Push all ON-OFF switches that will be used in to ON. Initially, best results will probably be obtained

with all AMPLIFIER A-B switches, out at A. Set the volume control for what is likely to be the loudest

location at maximum (fully clockwise), and the rest about halfway down. Turn the HI-FI system on, and

adjust it's volume for normal listening level at the loudest location. Then adjust the volume for the

remaining locations to a satisfactory loudness. If necessary, the same procedure can be repeated for the B

AMPLIFIER channel (if any).

TECHNOLOGY

OPERATION: