PA Tech PMA-200 User Manual - page 5
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power-up to prevent speaker damage if there is a high signal level at the inputs.
Whether you buy them or make them, use good-quality input and speaker cables. The Most
intermittent problems are caused by faulty cables. Use good-quality connectors and wire
along with good soldering technique to ensure trouble-free reliability. See the sections on
Stereo Operation and Bridged-Mono Operation for more information.
FRONT & REAR PANEL DISPLY
FEATURES ON PANEL CONTROLS
1~2. VOLUME CONTROL
The two input attenuator controls(located at the front panel) adjust gain for their
respective amplifier channels in all modes. The Main amplifiers have input sensitivities
of 1.15 Volts for rated power at 8 ohms, and have standard voltage gains.
3. PROTECT LED
Protect LED lights when protect function is active.
4. PEAK LED
All Main amplifiers features four front panel LED indicators (two per channel: Peak,
Signal) to inform the user of each channel’s operating status and warn of possible abnormal
function. A channel’s Peak LED will light dimly at the onset of peak and increase in
brilliance as peak becomes more severe, staying on until the peak cases. If the Peak LED’s
are flashing quickly and intermittently, the channel is just at the peak threshold, while a
steady, bright glow means the amp is “peak limiting” or reducing gain to prevent severely
peak-wave form reaching the loudspeakers.