Sugden&x27;s famous IA4 Class A circuit
Class A Single-ended OTL Power Amplifier Board with 33W Mono Channel
Supply Voltage: AC41v*1, Mono 200 W Reserve
Output power: 33 W
Size: 238*73mm
This is just the PCB. There are no components. The components of the picture are for display convenience.
1. Original Sanken 2SC2922 2SA1216
2. A powerful model of low frequency
3. It is recommended to adjust the working quiescent current to more than 300mA
4. The pair of tubes are precisely paired, the pairing current is 300mA, and the Hfe-level parameters are paired
![](https://ae01.alicdn.com/kf/H3fd6e239e7fe43f5b28a33791d46055cq.jpg)
![](https://ae01.alicdn.com/kf/H89428247201d4b4c855749afe9d9fe33k.jpg)
![](https://ae01.alicdn.com/kf/H6f523d88e75044499c9b91808b01997aM.jpg)