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About the Power 2
The Sonic Frontiers Power 2 is a stereo tube power amplifier produced between 1997 and 1999, featuring a push-pull design with 110 watts per channel output into 8 ohms. It uses a topology comprising an input cathode follower (6922 tubes), two differential plate-loaded voltage amplifiers (6922 tubes) in cascade, followed by a driver cathode follower (5687WB tubes) directly coupled to the output tubes (either KT88 or 6550). The amplifier is fully balanced throughout, including the output transformer, and supports both balanced and single-ended inputs with balanced feedback. It offers a frequency response from 5 Hz to 40 kHz, total harmonic distortion under 1%, and a damping factor of 50. The amplifier is known for a warm, sunny tonal character with excellent resolution of inner detail and dynamic range, outperforming some classic tube amps in these areas. It weighs approximately 50 kg and measures 460 x 560 x 230 mm. The Power 2 is highly regarded for its build quality, sonic performance, and ability to drive speakers down to 2 ohms. It is currently valued around on the used market.
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