DS AUDIO TB-100 TUBE EQUALIZER

ABOUT

Pure Vacuum Tube Amplifier

The TB-100 features were carefully selected, and the quad-matched ECC82 (12AU7) tubes were explicitly optimized for this model. Using in-house tools, performance variations during operation are minimized to within 1% (0.1dB), ensuring peak performance. Each channel has an inner tube for voltage amplification and an outer tube for output buffering, delivering a rich, transparent sound quality. Moreover, the amplifier employs a straightforward two-stage amplification circuit paired with low-impedance cathode follower output stages to provide a pure and dynamic audio experience.

Wideband Transformer Input

The audio signal from the PD is converted to a current-voltage signal, ensuring precise phase alignment between the left and right channels. Additionally, the design achieves a flat frequency response within -1dB over a broad range from 10Hz to 70kHz, delivering clear and high-quality sound.

Twin Mono Structure

The symmetrical twin-mono configuration incorporates completely independent grounds and power transformers. This design eliminates crosstalk between the left and right channels, enabling a cleaner and more immersive soundstage.

Low-Noise, Low-Voltage Power Supply

A dedicated low-noise regulated power supply is included for LED power and the PD negative bias voltage. Separate power circuits and transformers for each PD ensure excellent voltage stability supplied to the cartridge.

Technical Details
- single-ended design with RCA output - four selectable bass curves
- quad matched ECC82 (12AU7) for TB-100 measured and classified by a special in-house tool
- one tube for the gain stage and another tube for the output stage per channel cascaded anode followers for the gain stage and cathode followers for each output

Wide Frequency Range Transformer Input
-current to voltage conversion for the audio signal from photodiodes, simultaneous left and right phase alignment
- less than -1dB deviation from 10Hz to 70kHz 

Twin Mono Construction
-bilateral symmetry twin-mono amplifier section with completely separated grounds and power transformers