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Matching
transformer
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transformer
Matching
transformer
Matching
transformer
Matching
transformer
Matching
transformer
Example diagram constant voltage connections
2) Connecting the audio sources
The next step is making the input signal connections. Depending of the source type and
signal level (microphone or line), they need to get connected to the matching inputs.
Before connecting, turn all the channel input and master volume controls on the front
panel of the amplifier fully counterclockwise (to their minimum setting) and put the gain
control trimmers on the rear panel in a central position. Then connect the sources to the
corresponding inputs and turn on the amplifier and the connected audio sources. After
approximately five seconds, the protection LED will stop illuminating.
Apply a signal to the inputs as it will be used in normal operation circumstances and turn
the channel input level control up about 50%. Slowly raise the master volume control till a
certain level until the desired sound level is achieved. Depending of the output level of the
connected music sources, the input gain might need adjustment. Adjust these trimmers on
the rear panel until the desired level is achieved.
For the best signal to noise ratio, the amplifier shall be set with the master volume controller
setting near maximum position and the peak signal indicator is illuminating frequently, without
illuminating the clip LED indicator. If the signal sounds too loud or distorted, use the input
level controls to attenuate as necessary to achieve the desired output level.
