SW1X Audio Design™ AMP III “Trinity” Performance Level 3/4/5 45 DHT Integrated Amplifier   AMP III is a 2 gain stage Power Amplifier coupled with a High Quality Pre-amplifier using our in house designed and in house made stepped attenuator volume control. The Directly Heated 45 Triodes at the output are well known for their … Continue reading SW1X AMP III “Trinity” Integrated Amplifier