Second owner previous owner purchased Dec. 2015 the last unit from Herron Audio before they were discontinued. recently re tubed. No scratches, dents etc. Will only ship to USA address and shipping included to the lower 48 states. Accepting reasonable offers. Perfect tracking volume 166-step control system with unprecedented precision and dynamic range
Infinite resolution indirect signal path balance control
All-tube design operated conservatively for long life
Relay input switching eliminates switching distortion
Star grounding for low interference susceptibility and clean signal path
Zero feedback - no feedback loops in the audio circuitry
Super-low noise
High input signal capacity without overload; see technical specifications
Gold plated TIFF RCA and ground connectors
Hand-picked components for accurate response and consistent unit-to-unit quality
Automatic muting at startup and shutdown
72,000 µF of power supply energy storage capacitance
4 levels of high voltage regulation
Regulated soft-start DC filament supply
Regulated tube bias supply
Toroidal power transformer
Rugged 0.10" thick aluminum chassis with 0.25" thick heavily anodized faceplate
Reversing power line (AC) polarity switch for minimizing line-to-chassis reactive currents and noise pickup
Controlled warm-up of tube filaments and high voltage for extended tube life
Low plate operating currents for extended tube life and cool operation
Front panel indicators for power, filament voltage, and output/mute/monaural
Each unit is given an extensive burn-in, including rigorous bench and listening test. Specifications
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
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