Core component: UPC2581V is a HiFi-class dual-channel pre-driver integrated block developed by NEC for SONY
Core components: Tested paired with the new Sanken tube king C2922/A1216, the tube parameters are 200W / 230V / 17A.
The board line: adopts UPC2581V+ push tube + SANKEN high-power tube structure, the line is simple, stable, and the sound is very transparent. The push tube adopts a new ON medium power tube pair MJE243/MJE253 (100V/4A/15W/40MHz), and the stage quiescent current is designed to be a large current of 20mA.
Balanced wiring: Sanken Guanwang has a very large output current (200w/17A). It is recommended to use this board for bridging. Because the output power of the bridge circuit is 4 times that of the conventional one, it is recommended to reduce the power supply voltage properly. When the bridge is powered by AC30V, The output power is 8 ohms 200w, 4 ohms 400w. The independent power protection board is adopted, which is flexible and easy to arrange.
Recommended voltage: Regarding the adjustment of Class A, the quiescent current of the last stage of the power amplifier board can be adjusted to obtain the ideal sound quality. Use the matching heat sink of the shop: When the power supply is ±48, it is recommended to adjust each pair of tubes to 100mA; at ±35V When powering, it is recommended to adjust the quiescent current to 200mA.
Output power: according to different power supply voltage, different speaker impedance, output power 20-150w;
Printing plate size: 198*55mm; After installing power tube: 148*70mm; 2mm thick, 70um copper foil;
Midpoint voltage: the sample 2 channels are all around 0.3mV
Line gain: 68K/2K2+1=32 times;
Signal to noise ratio: 110dB, noise level: both channels of the model are 0.2mV
This product does not have a radiator, you need to buy it yourself.
Tested paired with the new Sanken tube king C2922/A1216:
Each finished board is tested for noise, distortion, and midpoint potential to measure maximum output capability.
The push tube uses a new ON medium power tube pair MJE243/MJE253 (100V/4A/15W/40MHz)