GM70 SET

About the GM70 SET

The Parmenter GM-70 SET mono block amplifier is a flagship single-ended triode (SET) amplifier designed for audiophiles seeking uncompromising sound quality. It employs two Russian NOS GM-70 directly heated triode tubes working in parallel in a pure Class-A configuration to deliver 70 watts RMS output power. The GM-70 tubes are military-grade with a massive anode structure and heavy glass envelope, providing durability, linearity, and reduced microphonics. The amplifier features a custom-designed SILK Super Output Transformer (model S-3000GM70) optimized for the parallel tube configuration to maintain harmonic purity and frequency response. It achieves a very low total harmonic distortion (THD) of 0.079% at 1 watt and maintains excellent linearity and flat frequency response from 10 Hz to 30 kHz and beyond. The design avoids global negative feedback to preserve the natural tube sound and harmonic characteristics. The amplifier is built with high-quality components and craftsmanship, including hand-polished wood and brass elements, reflecting a blend of vintage aesthetics and modern engineering. It is intended for use with high-efficiency speakers and offers a warm, clear, and transparent sound signature typical of SET amplifiers. The unit is sold as a dual mono configuration, emphasizing channel separation and soundstage precision. The price is approximately per monoblock unit.