Product Description:

Butler Audio Models 5150 is a vacuum tube-driven 5-channel power amplifier. Each channel Power Module is completely independent and includes separate RCA input and 5-way speaker output binding posts, vacuum tube, rectifier & filter capacitors, electronic components, protection and output power devices, etc. Butler Audio Model 3150 is identical to all descriptions within this booklet except that Power Modules 2 and 4 have been removed for a total of 3 channels. An internal AC Relay is provided for remote operation from a pre-amp capable of providing a voltage of 8 - 13V DC (either polarity) via the 3.5mm input jack on the rear panel.

Note: Leave the front panel AC Power switch in the "OFF" (down) position for remote operation.

Power Output:

Each channel is powered by a separate secondary winding from the massive 2KW-rated power toroid transformer. This yields a power rating of 150 Watts, RMS per channel into 8 Ohms, all channels operating simultaneously. Each channel is also capable of producing 225 Watts, RMS per channel into 4 Ohms. An appropriate source of 115 -120VAC nominal input line voltage with a minimum current supply of 15A for the 5150 or 12A for the 3150 is required. 230VAC models require approx. 50% of the current rating of 115- 120V models.

Protection:

Listed below are the various types of internal protection provided for unexpected conditions:

1)AC input fuse for protection against any major system power fault. Do not replace with a fuse of higher current rating!

2)Protection against AC input line transient voltage spikes and surges.

3)Slow vacuum tube filament warm-up: Provides safe, fully regulated, slow turn-on 6.3VDC for the tube heater filaments. This technique promotes longest tube life.

4)Turn-on and warm-up transient delay: This circuit will not allow the speaker relay to close (connect power module output to speaker posts) for a delay of approximately 20 - 30 sec. after turn-on. This provides for safe vacuum tube warm-up and

output stabilization.

Note: Due to normal component tolerance differences, some power modules will click "on" earlier than others.

5)Main DC Power (+/- 65V) Fuses: A red LED will be visible from the front panel adjacent to the tube of the affected channel if a fault condition causes a fuse to open.

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Butler Audio TDB 3150 manual Product Description, Power Output, Protection
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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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