JA 30Mk2

About the JA 30Mk2

The Jadis JA 30 MkII is a dual mono pure Class A tube power amplifier designed as monoblocks, each delivering up to 45 watts of power. It features automatic biasing, allowing the use of various power tubes such as KT88, KT120, KT150, 6CA7, and KT170 without manual adjustments, though a small internal modification is required when switching between certain tube types. The amplifier uses a push-pull design with custom Jadis C-Core output transformers, point-to-point pure copper wiring in critical signal paths, and a low global negative feedback design for vivid sound with clarity. It offers an extended frequency response from 15Hz to 46kHz, providing deep, controlled bass and a detailed midrange and treble. Each amplifier weighs approximately 22 kg (48 lbs) and measures 46 x 21 x 21 cm. The tubes are protected by fuses and the amplifier is self-biasing, ensuring reliability and ease of maintenance. The chassis is made of non-magnetic stainless steel for durability and sound quality. The JA 30 MkII is praised for its emotional engagement, musicality, and ability to drive demanding loudspeakers with control and finesse.