Crest Audio CPA Series Power Amplifiers Appendix E
Models CPA400, CPA600, CPA900, CPA1200, CPA1800
Appendix E
CPA1800 Power Amplifier - Special Functions
The CPA1800 rear panel features external switches for the following:
XLR Pin+ Switch: This switch configures XLR input connection polarity. Either pin 2 or pin 3 may be
selected as the “hot” (+) pin. Amplifiers are shipped pin 2 “hot” (+) from the factory.
Gain Switch: This switch permits the amplifier to be configured for the standard input sensitivity (.1.4V for
rated power @ 8Ω), or for optional voltage gains of X40 or X20. Refer to the specifications for input
sensitivity values at optional voltage gains of X40 and X20.
NOTE: on the 5-way Output Binding Post version of the CPA1800, two pairs of 5-way binding posts are
provided for each channel, so that paralleling of speakers is possible.
XLR Pin (+) Switch
Gain Switch
CPA1800 Binding Post Version - Rear View
CPA1800 Speakon Version - Rear View
ALWAYS power down the amplifier before changing settings
with either the XLR Pin+ switch or the Gain switch!
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