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.

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Butler Audio TDB 3150 manual Use and Operation, Front Panel Power Switch, Rear Panel Remote Jack
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TDB 3150 specifications

The Butler Audio TDB 3150 is a groundbreaking power amplifier that redefines the standards of audio performance in home and professional setups. Crafted with precision, this amplifier is celebrated for its unique combination of high output power, innovative technology, and exceptional sound quality.

At its core, the TDB 3150 is a three-channel amplifier that utilizes Butler Audio's proprietary hybrid technology. This technology integrates both solid-state and vacuum tube components, allowing the amplifier to produce a rich, warm sound typically associated with tube amplification while maintaining the clarity and oomph of solid-state designs. This blend results in a sonic experience that is both immersive and dynamic.

One of the most notable features of the TDB 3150 is its considerable power output, rated at 150 watts per channel into 8 ohms. This robust power enables the amplifier to drive a wide range of speakers effectively, delivering effortless sound reproduction even at high volumes. Additionally, the TDB 3150 offers exceptional headroom, allowing for a clean transition during dynamic passages of music or film soundtracks without distortion.

The amplifier also comes equipped with advanced thermal management systems, ensuring that it remains cool and performs optimally even under strenuous conditions. This is particularly important for users who demand reliability during extended listening sessions or in high-demand environments like studios or live sound situations.

Another key characteristic of the TDB 3150 is its sleek design and user-friendly interface. Featuring a minimalist aesthetic, it fits seamlessly into any audio setup without being an eyesore. Furthermore, the amplifier includes a comprehensive range of input options, including balanced XLR and unbalanced RCA connections, making it compatible with various audio sources.

Additionally, the TDB 3150 is built with high-quality components and meticulous attention to detail, ensuring durability and longevity. Its construction reflects Butler Audio's commitment to engineering excellence, promising years of reliable performance.

For audiophiles and sound professionals seeking an amplifier that merges the best of both worlds—tube warmth and solid-state power—the Butler Audio TDB 3150 is a standout choice. Its impressive specifications, advanced technology, and aesthetic appeal make it a worthy addition to any audio system, delivering an unparalleled listening experience that captivates the senses.
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