Butler Audio TDB 3150 User Manual

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.