Vtl (Vacuum Tube Logic) ST-150
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Model name
ST-150
Input sensitivity (mV)
100 000
Input impedance (balanced) (Ω)
N/A
Input impedance (single-ended) (Ω)
130 000
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
N/A
Max current (A)
N/A
Output power (8Ω) (W)
Tetrode: 120, Triode: 60
Output power (4Ω) (W)
N/A
Gain (dBu)
N/A
Frequency response low +/- 3dB (Hz)
20
Frequency response high +/- 3dB (Hz)
20 000
Signal to Noise Ratio (dB)
N/A
Total Harmonic Distortion + Noise (0% global feedback) (%)
N/A
Total Harmonic Distortion + Noise (100% global feedback) (%)
N/A
Max power consumption (W)
800
Damping factor
N/A
Dimensions (mm)
480 x 300 x 230
Weight (kg)
50
Official link
Tube stereo power amplifier. Reference Series. Output power: At 4 ohms Tetrode - 400 Watts, Triode - 200 watts; At 8 ohms Tetrode - 300 Watts, Triode - 150 watts. The VTL S-400 power amplifier is part of the American company's Reference series of equipment. It uses a number of technical solutions used in the top-end Siegfried monoblock power units, but it has a stereo design. With a huge power of 400 watts per channel, which is enough to play any compositions with any speaker systems, the VTL S-400 is at the same time capable of transmitting the most subtle nuances of a piece of music.
The VTL S-200 stereo power amplifier is well known to connoisseurs of high-end audio playback due to its excellent performance and reasonable price. The new version of the amplifier uses a fully balanced differential input stage, from which the signal passes to a differential phase distributor and a push-pull low-resistance output stage with an improved, fully balanced, dual transformer.
The VTL ST-85 is a compact stereo amplifier using 4 EL34 lamps, delivers a solid 60 watts of power per channel and offers full “VTL sound”, but at a real price. Using the classic "workhorse" approach that formed the basis of VTL sound, the EL34 models are made in a compact package with short signal transmission paths.