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KT88 tube option: is with 2x KT88 power tube, 2x preamp tube and a rectifier tube
Without any tube option: is the version wihtout any tube
Warning: Last items in stock!
Normal this amp have not brand name on the front panel, but "Boyuu" just changed their brand name to "Reisong", so maybe in the future this amplifier come with "Reisong" or others name like "Boyuu" or "Tube" words on the front plate, please pay attention, if you want some pecial plate, please contact us for more detail information
A20 architecture is inspirit the USA WE 91 with one level amplification circuit, with chinese 6J8P for voltage amplification， it can be replaced by 6SJ7 or many other samelly tube, and the power tube can use direclty with KT88 tube tube without any modification, so we have 3 version to choose
Basic technical parameters:
Product technology and materials
BOYUU is specially manufacturer for HIFI Transformers, It export to Japan or others countries, and one of leader market chinese brand of transformer , then it’s why the BOYUU’s amplifier transformers are better than others and its tube amps can give a better sound.
The latest 4nd version of A20 is with nice VU-meter:
With such more detail handmade ,and ALPS potentionmeter: