PA Tech PMA-200 User Manual - page 6
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5. SIGNAL LED
This green LED lights when its channel produces an output signal of about 4 volts RMS or
more ( 1 volt or more at the input, with 0dB attenuation), indicating that there is amplified
signal present in the amplifier. It is useful in determining whether a signal is reaching and
being amplified by the power amplifier.
Note: If the signal reaching the power amplifier is bellow 50-100mV, the LED will not be
active. Also, if the amplifier goes into protective mode, this LED will not active.
6. POWER LED
The green Power LED indicates that the channel is operational. It lights under normal
operation, when a channel is not in protection mode. If the Power LED goes off, there is no
signal at the module output point.
7. AC POWER SWITCH
Power ON/OFF switch
8~9. SPEAKER JACK
Connect same polarity of speaker(+,-)as terminal of connection of Left, Right speakers.
10. CH 1, 2 INPUT JACK
Balanced & Unbalanced signal input of CH 1 & 2. Can use XLR plug & 6.3 mm plug.
11. STEREO, MONO(BRIDGE) SWITCH
Slide switch to select stereo or bridged mono mode.
12. AC Mains Power Input Socket
AC115~230V, 50/60Hz
*Check the power source of AC Voltage before connections
13. Power Fuse
When power is overload, this Current will auto broken circuit and all LED at front panel
will turn off. Now, you should turn off the POWER SWITCH at front panel, then change
fuse at rear panel to recovery setting. Then pressing POWER SWITCH again to power-up
the amp.
14. GROUND TERMINAL
This is ground terminal to be connected with chassis of the turntable etc, to reduce hum to
the minimum. To further minimize hum, it may necessary to connect this terminal with a
wire to the nearest water pipe which goes directly to real ground.
15. Voltage Selector 115V~230V 50/60 Hz
CONNECTING INPUTS
Example:
1. Driving a single 8 ohm speaker with the combined 4 ohm power of both channel
2. Driving a single 4 ohm speaker with the combined 2 ohm power of both channel