V.S.O.P.
Vacuum State amplifier with Operational Phono preamplifier
As a compact version of our unique AM modular tube amplifier system, the V.S.O.P allows access to the AM2 full tube circuit, combined to a compact power pack concept, at limited expense.
Optional OP Phono amplifier in passive RIAA design,or optional Digital to Analogic Converter (DAC) make it really versatile.
As an affordable high performance Swiss Made unit, the V.S.O.P.'s circuit is three-dimensionally decoupled on a cast iron base frame using the same receipts as his benchmark, the AM series:
– Shortest signal path, connectors and cables used for connecting separate components are eliminated.
– Design eliminates impedance and gain mismatch and reduces the number of active circuits.
– Separate power transformers for tube and solid state sections
– Separate ground wiring together with central ground connection and ground lift for best signal purity and lowest hum and noise.
– Preamp and phase shifter with a bootstrap of ECC 81, power amplifier with 6V6 tetrodes in ultralinear configuration.
– High quality components all around, as perfectly symmetrical output transformer with 14 distinct windings on M74 core made from heat treated M111 oriented grain core, Mundorf and SCR polypropylene capacitors for signal path, 105°C electrolytic capacitors for filtering and double layer Zincor cardboards
Class of Operation | PUSH PULL Class A |
Tubes | 2x 6V6GT and 1x ECC81 per channel |
Input Voltage | 120V/60Hz |
Output Power | 8 Watts @ 8 ohms (Optionally with 4 or 16 ohm output) |
Input Sensitivity | 360 mV |
Input Impedance | 100 Kohm |
Frequency Bandwidth | 25Hz - 60KHz (+/- 2dB) NO Negative Feedback |
Inputs | 4 x RCA 1 x RCA Coax (digital-ready) |
Our first product was the non-magnetic cast iron main platter for the classical Thorens TD124 turntable. Equipped with multiple Swissonor.ch upgrade parts, the Schopper Mod's for Thorens TD124 was declared “Product of the year 2008” by Stereophile's Art Dudley. Yes, a more than 50 year old upgraded turntable can be state-of-the-art! Since then, Swissonor produces a complete genuine product range with a single goal- achieving best sound performance from analogue sound sources.
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