録音機器 Audioplex MPG-395のPDF マニュアルをオンラインで閲覧またはダウンロードできます。Audioplex MPG-395 2 ページ。 Speaker selector-volume control

INSTALLING AND USING YOUR OPT-6-70 SPEAKER CONTROL

Your OPT-6-70 Speaker Selector-Volume Control is designed to operate with up to 6 pairs of

loudspeakers of 4, 8, and 16 Ohms impedance in any combination. It can be used with one or two stereo

amplifiers, or with 4 Channels of a surround-sound type sound system. Each of the 6 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. Speakers

selected for operation with the A amplifier input will have the same impedance protection as those that

may be operating with the B amplifier. The number of pairs of speakers in operation on either channel will

have no effect on any operating on the other.

Other OPT-6 features include power handling capability of up to 25 Watts RMS continuous (72 Watts

audio) at 8 Ohms in any switching mode. 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 push-to-open connections are provided on the rear panel to insure positive, long lasting

connections. These connections can be used with up to 3/16" diameter. To make connections, strip about

3/8" of insulation from the wire end. Push the connector tab toward the rear panel to open the hole. Insert

the stripped wire end into the opening , and release the tab. 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

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