Tube Power Amp Reviews

Description: Direct-heated-triode, single-ended, class-A tube monoblock power amplifier. Tube complement: one each WE437, 6550/KT88, SH-833. "Effective" power: 150W (no distortion percentage specified). Frequency range: 20Hz-100kHz. Input sensitivity: 1V. Input impedance: 100k ohms. Signal/noise ratio: >100dB (no reference level quoted).
Dimensions: SH-833 amplifier: 16" (410mm) W by 10¾" (275mm) by 20½" (525mm) D; 110 lbs (50kg). PS-833 power supply: 16" (410mm) W by 12 1/8" (311mm) H by 20½" (525mm) D; 143 lbs (65kg). TB-833 power transformer: 20" (510mm) W by 12 1/8 (311mm) H by 20½" (525mm) D; 134 lbs (61kg). IS-833 isolation transformer: 20" (510mm) W by 12 1/8" (311mm) H by 20½" (525mm) D; 158 lbs (72kg).
Serial numbers of units reviewed: 3Z35001 & 2.
Price: $350,000/pair. Approximate number of dealers: 10. Warranty: 1 year parts & labor; 6 months, tubes.
Manufacturer: Wavac Audio Lab, Sigma Co., Ltd., 1404-26 Nakada-Machi Yonezawa-Shi, Yamagata 992-0011, Japan. Web: www.wavac-audio.gr.jp. US distributor: tmh audio, P.O. Box 751681, Dayton, OH 45475. Tel: (937) 439-2667. Fax: (937) 441-7418. Web: www.tmhaudio.com.