OPERATION
GAIN CONTROLS
Turn down the gain controls before applying power. The gain controls are detented 21 steps for repeatable adjustment. Surrounding the gain control knob, the attenuation level is shown in dB. The gain structure may be selected on the PL2A. On the rear panel you will find a switch labeled
AC POWER SWITCH
Before applying power, check all connections and turn down the gain controls. The "soft start" sequence starts with the POWER indicator
LED at half brightness. A few seconds later the fan starts, the POWER indicator fully illuminates and the amplifier mutes for two seconds.
The CLIP LEDs will glow bright red. When the CLIP LEDs go out, the amplifier is ready.
FRONT PANEL LED INDICATORS
At full brightness, the green POWER LED indicates that the amplifier is operating. Half brightness indicates the amp is in its
As the input signal strength increases, the green SIGNAL,
The red CLIP LED indicator flashes during overload (clipping). A bright, steady glow indicates protective muting; if this occurs during use, see Troubleshooting.
The yellow BRIDGE LED illuminates when the MODE switch is set to BRIDGE.
The blue
The orange PARALLEL LED illuminates when the INPUT CONFIGURATION switch is set to PARALLEL.
Front panel: gain controls and indicator LED’s for signal level, clip indication, power status indication, and operating mode (bridge, parallel,
NORMAL OPERATING LEVELS
The amp's protective muting system guards against excessive internal temperatures. With normal ventilation and 4 to 8 ohm loads, the amplifier will handle any signal level including overdrive. Lower load impedances and higher signal levels produce more internal heating. When using 2 ohm loads, frequent or prolonged clipping may trigger power cutback or protective muting.
BRIDGE mode doubles the output impedance of the amp; 4 ohms is the minimum load impedance. Heavy clipping may cause muting. If this happens, see Troubleshooting section.
25
