Tube Power Amps

Balanced Audio Technology VK-5 Line Preamplifier: Frequency responses: 1.59Hz-1.5MHz (typical: volume control at 11 o'clock); 1.59Hz-240kHz (worst case: full volume); -3dB points. Distortion: 0.02% at 2V RMS output; second harmonic: -72dB; third harmonic: -85dB. Maximum gain: 13dB, balanced or unbalanced. Gain adjustment range: 4dB each channel. Noise: -100dB (unweighted, ref. 2V RMS output). Input impedance: 120k ohms typical, 100k ohms minimum (single-ended). Output impedance: 1100 ohms balanced; 850 ohms single-ended. Maximum output: 40V RMS balanced, 20V RMS single-ended. Overload protection: one main power fuse, electronic internal over-current protection (each channel). Tube complement: eight 6922s, two 5881s. Power consumption: 150W maximum, operating mode; 30W typical, Sleep mode.
Dimensions: 19" W by 15.5" D by 5.75" H. Weight: 31 lbs.
Serial number of unit tested: 5040039. Price: $3995.

Balanced Audio Technology VK-60 power amplifier, stereo configuration: Power output: 55W minimum (17.4dBW, 8 ohms), 65W typical (18.1dBW, 8 ohms) (8 or 4 ohm load, <3% THD). Power bandwidth: <7Hz-100kHz. Input impedance: 200k ohms (each phase). Output impedance: 2.5 ohms (high-impedance taps), 1.4 ohms (low-impedance taps). Gain: 28dB, balanced or unbalanced. Tube complement: four 6C33C-Bs, six 6H8Cs. Power consumption: 500W maximum (idling).
Dimensions: 17" W by 24" D by 8" H. Weight: 85 lbs.
Serial number of unit tested: 600500051.
Price: $4495 (VK-60, 1995); $4950 (VK-60, 1996-2000); $6000 (VK-75, 2001); $8500 (VK-75SE, 2001).

Balanced Audio Technology VK-60 power amplifier, monoblock configuration: Power output: 110W minimum (20.4dBW, 8 ohms), 125W typical (21dBW, 8 ohms) (8 or 4 ohm load, <3% THD). Power bandwidth: <7Hz-100kHz. Input impedance: 100k ohms (each phase). Output impedance: 1.25 ohms (high-impedance taps), 0.7 ohm (low-impedance taps). Other specifications: same as for stereo configuration.
Serial number of unit tested: 600500050.

Common to all: Warranty: 5 years. Approximate number of dealers: 15.
Manufacturer: Balanced Audio Technology, 800 First State Blvd., Wilmington, DE 19804. Tel: (802) 255-4228, (302) 999-8855. Fax: (302) 999-8818. Web: www.balanced.com.