Back Panel - Crest Audio HD SERIES Manual

Rear Panel
See Appendix E for information specific to model HD18.
10. Output Connectors
Your amplifier is supplied with 5-way Output Binding Posts. Connection to the binding posts can be made
with bare wire, banana plugs, or spade lug terminations. Make connections to both the Channel A and
Channel B terminals for Stereo or Parallel Mode, or a single connection across the red ("hot") terminals
only of Channels A and B for Bridged Mono Mode. See Appendix D and the section on Mode Selection for
more information. NOTE: on the HD18, two pairs of 5-way binding posts are provided for each channel, so
that paralleling of speakers is possible.
11. Mode Selection Switch.
This recessed, three-position switch configures the amplifier for Stereo, Parallel or Bridged Mono Mode
operation. Amplifiers are factory-configured for Stereo Mode. See Appendix D and the section on Mode
Selection for more information.
12. Signal Ground Lift Switch.
The recessed signal ground lift switch is factory-set to the 'ground' (bottom) position, which electrically
connects the signal ground to the chassis/AC ground. The top position lifts the amplifier's signal ground. In
a properly designed system (for safety purposes and to minimize noise), the amplifier should be connected
to ground through the AC line cord. Also, whenever possible, the signal source equipment should share the
same AC ground as the amplifier. In some cases this may not be possible, and a ground loop results. If this
happens, the first step is to move the ground lift switch to the top ('lift') position. In this position, the signal
ground is lifted and completely isolated from the chassis/AC ground. Do not change the switch to the 'lift'
position if the amplifier and the signal source equipment are on the same AC ground. Should the ground
loop problem persist after the ground lift switch has been set to the 'lift' position, then the shield on bal-
anced input lines should be grounded at one end only (usually the signal source).
Crest Audio HD Series Power Amplifiers
Models HD2, HD4, HD6, HD9, HD12, HD18
Never connect a "hot" (red) output to
ground or to another "hot" (red) output!
CAUTION
A
RISK OF ELECTRIC SHOCK
DO NOT OPEN
+
AVIS : RISQUE DE CHOC ÉLECTRIQUE—NE PAS OUVRIR
WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT
EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
ATTENTION! POUR ÉVITER LE RISQUE D'INCENDIE OU DE CHOC
ÉLECTRIQUE, NE PLACEZ PAS CET APPAREIL SOUS LA PLUIE OU Á
L'HUMIDITÉ +
A
B
+
B
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Designed & manufactured in the USA by:
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A
Paramus, New Jersey 07652 USA
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Crest Audio Inc.
100 Eisenhower Dr.
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