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ST-150 is a classic all-tube push/pull power amp delivering 150Wpc into 5 ohms in tetrode mode, and, via the flick of a rear panel toggle, 70Wpc into 5 ohms in triode operation, with a parallel 12AT7 input stage and 12BH7 long-tailed phase-splitter driving the push-pull output stage. VTL’s goal in designing the ST-150 was to create a relatively compact yet powerful stereo power amplifier employing 6550 tubes capable of driving a wide range of speaker loads. ” Compared to EL34s, Luke Manley says the 6550s offer the ability to operate in either tetrode or triode modes, and provide better bass wallop and linearity, and an extended well-defined treble.” Technical specifications: Vacuum Tube Complement: 8 x 6550, 2 x 12 AT7, 2 x 12BH7. Input Sensitivity @ 150W: 100V=0.880V; 120/240=1.0V. Input Impedance: 130 KOhm. Output Load Range: 2 Ohm – 8 Ohm. S/N ratio: -95dB, 120Hz. Power Consumption: Idle=240W, Full Power=800W. 1 x Single-ended RCA input. Remarks: Some minor dents on the left top corner of the front panel and one minor dent on the corner of the left front panel. |
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