Established 1968   01603 627010

Available at Martins Hi-Fi

VTL ST-150

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£6,900.00 Enquire About This
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VTL ST-150


 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.

&bull 150 watts per channel.

&bull 95 lbs, 19" x 10" x 9".


VTL Tetrode-Triode Switching Capability

The VTL range of power amplifiers offer a unique feature that makes them even more flexible: On-the-spot switching between tetrode and triode modes of operation that is easy to reach and user switchable.

At lower volume levels, and with efficient speakers, the sound of the triode mode offers a level of delicacy, liquidity, and sweetness to vocals, chamber and jazz instrumental quartets and solo instruments with 3-D imaging in the mid-range that will get you even closer to the real event.

Tetrode mode offers the detail, soundstage width and depth, and weight to the music that on large-scale orchestral or big band will transport you to the concert hall with all the visceral power and detail rendition of your favorite music.

A changeover switch is provided on the back of the VTL amplifiers to make changing between the two modes a breeze - just power down the amplifiers, flip the switch to the desired mode, and power the amplifiers up again.

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


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


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