B22 (reference Beta 22 β22 circuit) HI-END reference level amp kit
Special Note:
This kit is not equipped with an input tube, please bring your own;
At the same time, the kit price dropped from 148 yuan to 108 yuan
Reference input pair tube model:
K170J74 (BL file), K364J104 (BL file), K366J107 (BL file) K246J103 (BL file needs to be reversed)
Note: The product is a loose kit (players need to weld themselves)
The price is: a monophonic package, if you want to do stereo, you need to buy 2 sets of discrete package channels.
HI-END reference level, http://www.amb.org/audio/beta22/, β22 circuit
Please refer to the welding method and debugging rules by yourself. If you don't understand the E text, please Baidu.
This component configuration is according to one of the requirements mentioned by AMB, and the whole line is matched with the same pole.
J503 (E501) constant current tube has very good repeatability, so there is no need to reconfigure it.
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![](https://ae01.alicdn.com/kf/Hfd4de8ba563e4dcfb2f985461af3efffE.jpg)
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