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5
6) DC Offset Voltage at Speaker Output: Continuous monitoring
circuit immediately opens the speaker relay upon the detection
of any excessive DC voltage level.
7) Short circuit protection: In addition to the Main DC Power
Fuses, mentioned in #5 above, this continuously active circuit
becomes active to the speaker output below a load of approx.
2 ohms. It will prevent a catastrophic over-current condition
for the output devices in the case of a direct short circuit
between the + and - output speaker binding posts.
8) Over Temp Circuit Breaker: Opens the speaker relay if the
heatsink temperature exceeds 115 deg. C. If this occurs, the
amp should automatically begin operate again after the
temperature has decreased sufficiently.
NOTE: BE CERTAIN THAT AIR FLOW IS COMPLETELY UNRESTRICTED
ABOVE AND BELOW THE AMPLIFIER. IF RACKMOUNTED, LEAVE AT
LEAST A STANDARD SINGLE SPACE BETWEEN THE NEXT PIECE OF
EQUIPMENT (TOP AND BOTTOM) OR PROVIDE FORCED AIR COOLING.
THIS AMP IS DESIGNED FOR USE ONLY AT ROOM TEMPERATURE WITH
ADEQUATE VENTILATION AND CIRCULATION.
IMPORTANT: COOL OPERATION = LONGEST LIFE AND RELIABILITY!
DO NOT OPERATE WITHIN A COMPLETELY CLOSED CABINET OR
ENCLOSURE! LET YOUR AMP BREATHE!
Use and Operation:
Important: Do not apply power until you have read and understand this section!
Connect or disconnect cables only with amplifier OFF.
Note: Your new Butler Audio multi-channel amp is designed to operate with ONE separate
speaker system connected per channel. Bridging or combining channels in any manner
should never be attempted. Connect "Speaker Outputs" to speakers only! DO NOT
SHORT ANY SPEAKER OUTPUT POST TERMINAL TO ANY OTHER SPEAKER OUTPUT
POST TERMINAL. CONNECT EACH SEPARATE SPEAKER LOAD ONLY BETWEEN THE
SPEAKER POSTS OF ONE CHANNEL. DO NOT CROSS-CONNECT IN ANY MANNER!
Front Panel Power Switch:
Supplies main AC power to the amplifier. The ON position is up and
will be indicated by the blue LED indicator and the blue glow of the
tubes through the front panel louvers.
Rear Panel Remote Jack:
This 3.5mm standard mini phone jack is connected to a heavy duty
AC relay that parallels the operation of the Front Panel Power
Switch. Therefore if remote operation is desired, leave the switch in
the OFF (down) position. Whenever an 8 - 13V DC voltage is
supplied to the jack (either polarity) the amp will be turned ON just as
if the front power switch were used. It will not harm the amplifier if
the front panel power switch is turned ON with the relay activated,
but this will disable the remote function until it is switched OFF again.