Tube Power Amp Reviews

Description: Push-pull, tube stereo power amplifier. Tube complement: eight 6550/KT88s (output), six 6922s (input/voltage amp), and two 5687WBs (driver cathode followers). Power output: 110W continuous into 8, 4, and 2 ohms (20.4dBW), terminated with rated load, 20Hz–20kHz, with <1% THD, both channels driven. SMPTE intermodulation distortion: <1%, 20Hz–20kHz, at 110W output. Power bandwidth (110W output): 15Hz–90kHz (–0.5dB points). Frequency response: 5Hz–40kHz at 1W (–0.5dB points). Input sensitivity: 1.25V RMS balanced for 110W output. Input impedance: 200k ohms balanced, 100k ohms single-ended. Damping factor: >50. Output impedance: 0.30 ohms at 1kHz. Rise time, 3µs. Slew rate, 16V/µs.
Dimensions: 18" W by 9" H by 22" D. Weight: 110 lbs net.
Serial number of unit reviewed: 963609.
Price: $4495 (1997); no longer available (2005). Approximate number of dealers: Not known.
Manufacturer: Sonic Frontiers, Inc. (1996), 2790 Brighton Road, Oakville, Ontario, Canada; Paradigm Electronics Inc. (2005), 205 Annagem Blvd., Mississauga, Ontario L5T 2VI, Canada. Tel: (905) 632-0180. Fax: (905) 632-0183. Web: www.paradigm.com.