TRANSFORMER COUPLED HYBRID POWER AMPLIFIER
- Audiophile long life input tube
- Silicon carbide rectifiers
- Shunt regulated power supply
- Solar cell bias of output stage
- Microprocessor controlled
- NO feedback
- Special grade screened power transformer
- JFET/MOSFET cascode output
- Available in stereo and mono version
Single-ended tube input stage loaded with a phase splitting transformer controlling 2 separate out of phase single-ended amplifiers for output.
The tube handles all the voltage gain needed. It uses a new generation or our choke rectified shunt regulated power supply providing a noise-free operating point.
The output stages power JFET cascodes form a bridge that when unbalanced by the input signal via the 2 transformer windings restores balance by adjusting their current conduction through the load. The 2 output stages actually enclose the load in their control loops and try to correct each-others errors reducing the distortion to insignificant amounts, leaving the “character” of the input stage untouched.
Not sharing a common reference point apart from the load itself makes the second leg correct for any error produced by the first one. The result is an amplifier capable of extreme power while delivering exquisite smoothness and low-level resolution.
Having the output stages floating around the load prompted for the use of a unique biasing technique powered by solar cells. This was the quietest galvanic isolated power we could come up with. Using opto-electrical conversion we control the bias by adjusting light intensity in the control circuit.
Teres is an example of modern technology solving age-old problems allowing us to go a step beyond.
The physical appearance of Teres has the kind of understated elegance typical for Thrax. The exquisite aluminum finish adds to the presentation of a solid block of metal like a bigger brother of Heros. Enjoy.
Stereo Version: 150W in 8Ω / 200W in 4Ω
Stereo Version: 20db