Connecting Power; Operating Modes; Stereo Operation; Parallel Operation - Optimus MT-1500 Installation And Operating Instructions Manual

MT-1500 / MT-3500
Power Amplifiers

3.9 Connecting power

Power demand from the AC mains depends on many factors (including its load, output level, and
the crest factor of its program material). The amplifier power requirement is rated under typical
music conditions. Maximum current draw for each amplifier is listed in the specifications section. In
any case, it's no necessary to remove the top cover. Removing it can expose dangerous voltages
and shock hazards.

4. OPERATING MODES

4.1 Stereo operation

For stereo mode, both channels operate independently of each other. Thus, a signal at channel A
input is amplified and broadcasted to channel A output, while a signal at channel B input is
amplified and broadcasted to channel B output.
Before connection, turn off the power amplifier, minimize the volume gain potentiometers of both
channels and set the mode switch to STEREO position.

4.2 Parallel operation

In parallel mode, one signal can be sent to both channels without external connection. The audio
signal is broadcasted from channel A input to channel A and channel B outputs. The volume is
controlled by means of channel A potentiometer.
Before connection, turn off the power amplifier, minimize the volume gain potentiometers of both
channels and set the mode switch to PARALLEL position.

5. SWITCHES AND CONTROLS

5.1 AC power switch circuit breaker

The amplifier has a combination AC switch/circuit breaker on the front panel. If the switch shuts off
during normal use, push it back to the ON position once. If it will not stay on, the amplifier needs
servicing.

5.2 Input volume potentiometers

The input potentiometer controls (one for channel A, one for channel B) are located on the front
panel and adjust the gain in all modes. Whenever possible, set the potentiometers fully clockwise
to maintain optimum system headroom.

5.3 Mode select switch

The rear panel mode select switch determines whether the amplifier is in stereo or parallel mode.
Do not operate the mode select switch while the amplifier is on. See the sections about stereo and
parallel mode for more information.
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