VTL ST-150 Performance Series

PRICE $9,500.00

Over 150 watts per channel (300 watts of stereo power), this stereo amplifier offers superb musical clarity and plenty of power in one compact chassis. Utilizing the finest quality parts, and entirely hand built by experienced craftsmen, the ST-150 represents our pinnacle in stereo amplifier design. The noted VTL quick clean musical sound and exceptional bass punch is delivered here by the 6550C tubes. Exceptionally well suited to triode operation, yet they are also very quick and clean in tetrode mode, these VTL amplifiers are well-suited to smaller electrostatic panels and dynamic speakers not requiring high current. For commanding performances on the midrange and clarity on the top, VTL wins hands down. In triode mode, the amps are best suited to speakers with an efficiency of 92dB/1W/1m or higher. Try these designs as a great sounding alternative to single-ended triode designs.

ST-150 Stereo Amplifier Data Specifications

Vacuum Tube Complement 8 x 6550C, 2 x 12BH7, 2 x 12AT7

Output Power
20 Hz – 25 kHz ± 0.1dB < 3% THD
(Stable to 2 Ohms) into 4 Ohms

Tetrode = 175 Watts
Triode = 90 Watts
into 8 Ohms

Tetrode = 140 Watts
Triode = 75 Watts

Small signal frequency response
(< 0.2% THD @ 1W) 1 - 75 kHz -3dB

Class of output operation AB1

Inputs / Outputs Single-ended RCA /
1 pair 5 way binding posts

Input Sensitivity / Impedance 1.0 V / 100K Ohms

Output Impedance 1.65 Ohms

Power Consumption Idle = 280W
Full Power = 950W

Primary Main Fuse Rating 110/120V = 15A Ceramic Slo Blo
220/240V = 8A Ceramic Slo Blo

B+ Fuse Rating 1A fast acting ceramic 600V

Dimensions W x D x H 19 x 13.25 x 8.75 inches
48.25 x 33.5 x 22.25 cm

Weight per unit 95 lbs (43 Kg) fully packed