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VTSP-1A/166 (Extended Range)
Vacuum Tube Stereo Preamplifier

VTSP-1 Front Panel
front panel
VTSP-1 Back Panel
rear panel

Design Considerations

Tube complement 4 x 6922
Frequency response 1 Hz to beyond 100 kHz, 20 Hz to 20 kHz ±0.1 dB (volume control at 9 o'clock)
Volume Control 166-position electronic stepped attenuator
Volume Tracking Maximum differential: ±0.1 dB channel to channel
Output impedance 100 Ohms nominal at 1 kHz
Input impedance 100,000 ohms
Power supply 72,000 µF of energy storage
4 levels of high voltage regulation
Regulated soft start DC filament supply
Regulated tube bias supply
Toroidal power transformer
Power requirements U.S.: 120 VAC 60 Hz, 30 VA, Fuse 1/2 amp 250 volt slow blow
Export: 230 VAC 50/60 Hz, 30 VA, Fuse 1/4 amp 250 volt slow blow
Input capacity 18 Volts RMS
Overall dimensions 19" wide x 3.5" high x 10" deep
Warranty 3 years, parts and labor
Tubes: 90 days

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Herron Audio, div. of Herron Engineering, Inc.