The fully balanced, all-triode VK-55SE power amplifier retains all the strengths that make the VK-55 a stellar performer – including the world-class automatic-bias circuit found in BAT’s reference REX II Power amplifier–while incorporating the 6H30 SuperTube into a completely revised first gain stage. This is the same tube used in BAT’s REX II models, and provides the VK-55SE with a more transparent, involving reproduction of the musical event. The VK-55SE also employs the same paper-in-oil capacitors used in BAT’s flagship amplifier designs, resulting in more natural and coherent sonics. Finally, the power-supply energy storage is increased to over five times that of the VK-55!


Output per channel at 8Ω/4Ω 55W / 55W Conversion to Mono? Factory or Wire Kit
Output in Mono Configuration 8Ω/4Ω 110W / 110W Frequency Response 8Hz to 200kHz
THD at full power 3.0% Input Impedance Рstereo version 215 kΩ
Input Impedance Рmono version 108 kΩ Gain (Nominal into 8Ω) 25dB
Tube Complement 2x6H30, 2x 6SN7, 2×6922, 4x6C33C-B Number of Power Cords 1
Remote Control No Power Consumption (Idle/Full Power) 400W/800W
Dimensions (Inches) 17″W x 8″H x 16″D Dimensions (mm) 431W x 203H x 406D
Weight 50 Lbs



As I listened to Arturo Delmoni’s superb disc of solo violin works by Ysaye Kreisler, and Bach (CD, John Marks JMR-14), the character of the BAT was immediately apparent: the sound was vivid, relaxed, and liquid. Delmoni’s 1780 J.B. Guadagnini violin has an unusually big sound, and the ’55SE reproduced that bigitude, and the Guadagnini’s timbral impact, with clarity‚Äîit didn’t sound too big or too bright, but just right. Read More