AI-generated product photo — not official manufacturer imagery.
Estimated price (community-sourced)
Around — community and catalog average, updates slowly
The VTL ST-150 is a stereo power amplifier designed to provide an engaging and true-to-live listening experience. It features a tetrode/triode switchable design, delivering 120 watts per channel in tetrode mode for wide dynamic response and bass punch, and 60 watts per channel in triode mode for delicate, detailed, and intimate sound suited to vocal and small instrumental ensembles. The amplifier uses 8 x 6550 tubes, 2 x 12AT7, and 2 x 12BH7 tubes, with individual bias settings for each 6550 tube. It is hand-built with audiophile-grade components including film and foil capacitors in the signal path and proprietary output transformers. The ST-150 offers a very low noise floor with a specially designed grounding scheme and a high energy storage power supply exceeding 200 joules. It is well-suited for smaller electrostatic panels and dynamic speakers with efficiencies of 92dB/1W/1m or higher. The amplifier has an extruded aluminum front panel available in black or silver, and measures 19 x 12 x 9 inches, weighing approximately 85 lbs (38.6 kg). Power consumption is 240W idle and 800W at full power. Input sensitivity is 0.880V at 100V mains and 1.0V at 120/240V mains, with an input impedance of 130K ohms and an output load range of 2 to 8 ohms. Signal-to-noise ratio is -95dB at 120Hz, and total harmonic distortion is less than 3% from 20Hz to 20kHz at rated power. The amplifier includes appropriate ceramic fuses for mains and B+ circuits.
Amplification power output and characteristics
Analog signal output specifications
Input and output connections
Size, weight, and appearance
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The MB-185 III Signature's power @ 8ω is 225W against the ST-150's 120W and its signal-to-noise 90 dB against 95 dB. Both share thd (3.000%) and class (Tube).
The MA2275's power @ 8ω is 75W against the ST-150's 120W, its signal-to-noise 93 dB against 95 dB, and its thd 0.500% against 3.000%. Both share class (Tube).
The MC60's power @ 8ω is 60W against the ST-150's 120W, its signal-to-noise 90 dB against 95 dB, and its thd 0.300% against 3.000%. Both share class (Tube).
The M50's power @ 8ω is 50W against the ST-150's 120W, its signal-to-noise 84 dB against 95 dB, and its thd 0.500% against 3.000%. Both share class (Tube).
The specs and the pairings above are open to everyone. Sign up and you get the system builder, the assistant, a compatibility check against the gear you already own, and a watch on this product so a price or pairing change reaches you.
Sign up freeManley Laboratories Neo-Classic 250