An all-tube amplifier, the S-200 is the culmination of VTL’s
most advanced thinking in performance engineering.
A proprietary regulated power supply, high-grade parts, and an automatic tube bias system ensure ultra high fidelity audio reproduction, while tube fault diagnostics
and user feedback offer the ultimate in usability and convenience.
The audio amplifier is comprised of a fully balanced differential input stage driving a differential phase splitter and a lower impedance push-pull output stage with a dramatically improved, fully balanced, interleaved and coupled output transformer. Furthermore, the new design in the amplifier incorporates a shorter, waste and fully balanced negative feedback loop, with zero global negative feedback. The negative feedback loop completely eliminates ringing and requires no capacitor compensation to maintain critical phase integrity and information. Further engineering innovations in the S-200 Signature amplifier include a variable Damping Factor feedback control that allows the user to precisely adjust the amplifier’s output impedance by setting the amount of negative feedback to one of three possible levels. Impedance can now be varied to suit the listener’s taste, and to improve control of the loudspeaker loads to deliver best performance. Adjustable precision-regulated bias and screen supplies keep the operating point of the output tubes constant even under AC and main power supply fluctuations, and stabilise the power supplies for greater tonal stability and sonic integrity especially during complex, dynamic signal conditions.