ProLogue Seven

About the ProLogue Seven

The PrimaLuna ProLogue Seven is a vacuum tube monoblock power amplifier designed for audiophiles seeking classic tube sound with modern reliability and performance. It delivers 70 watts per channel using four KT88 output tubes in push-pull topology, complemented by two 12AX7 and two 12AU7 tubes per amplifier. The amplifier features a unique dual-feedback topology combining cross-coupled current feedback and slight negative feedback to achieve low distortion, exact gain, and low output impedance without the drawbacks of traditional feedback circuits. It includes premium components such as upgraded Solen capacitors and fast recovery diodes for enhanced midband clarity and detail. The Adaptive AutoBias circuit continuously monitors and adjusts tube bias, reducing distortion by over 40% between 12 and 30 watts and eliminating the need for manual bias adjustments or matched tubes. The SoftStart circuit prolongs tube and component life by gradually applying power at startup. The amplifier supports 2, 4, and 8 Ohm speaker taps and has a frequency response of 20Hz to 85kHz (+/- 0.5dB). It is hand-made with point-to-point wiring and housed in a finely finished chassis. Dimensions per amplifier are 11" x 7.5" x 15.5" and weight is 37.5 lbs. The ProLogue Seven is praised for its powerful, warm, and detailed sound with excellent bass authority and air, making it a refined upgrade over the ProLogue Five stereo amplifier. It is