SW1X Audio Design™ MPA II Morpheus Performance Level 1/2/3 KT66 Valve Mono Power Amplifier   Morpheus is a Pure Class A, Zero Negative Feedback, Fully Valve Rectified, Single Ended, 3 Gain Stage, Interstage Transformer coupled, Mono Power Amplifier. The KT66 Triodes in combination with 6V6 triode connected driver tubes offer the presentation of the famous … Continue reading SW1X MPA II “Morpheus” Mono Power Amplifier