Tubes & Topology At the heart of the Soul 170P are four TUNG-SOL KT170 beam tetrodes, operating in a Class A push-pull configuration. The amplifier also features: l Voltage Amplification Tubes: 2 × 12AU7 In the voltage amplification stage, two JJ 12AU7 tubes are responsible for initial signal gain, providing the necessary voltage amplification before driving the output stage. Their low distortion and noise characteristics contribute to stable signal handling. l Driver Tubes: 2 × 6SN7 Employed in the driver stage, the JJ 6SN7, known for its musicality and powerful drive, contributes to a sound that’s both emotionally engaging and analytically revealing. l Rectifier Tube: 1 × 17AX4GT This classic rectifier tube supplies a stable DC voltage to the driver stage, ensuring reliable performance and a refined sound with beloved tube body musical expression.
