11
Output Connections
Output Connections
Output Connections
Output Connections
Output Connections
Use class two wiring and sufficiently sized speaker
cable wire to minimize signal loss.
If the power amplifier will be used to drive a
constant voltage (70.7V) transmission line,
accessory output transformers will be required.
When the PA-4020B is used with constant volt-
age transformers, it will provide 180 watts at 70.7
volts from each channel. In bridged mode, the
PA-4020B will drive two output transformers to
produce 350 watts at 70.7 volts.
When used in a constant voltage mode, the
sound system should have a high pass filter (low
frequency cut) to prevent saturation of the
constant voltage transformers. A second order
(12dB/octave) Butterworth filter at 40Hz or higher
frequency is recommended. A first order
(6dB/octave) filter may be used if it is placed at
80Hz or higher frequency.
See figure 3, 4 and 5 for connection information
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PA-4020
Balanced input noninverting - dual channel output
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Unbalanced input noninverting -- dual channel output
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Balanced input non-inverting -- bridge mode
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PA-4020
PA-4020
Fig. 3 Output Connections
