1. Power input to increase the rectifier bridge, AC and DC can be used, the input DC is not divided into positive and negative, more convenient for
2. Performance is more stable
3. Using NE5532 op amp chip and round hole 8 pin IC socket, easy to upgrade the op amp chip.
4. Board size: 50mm * 33mm
5. Operating voltage: DC 9V ~ 24V / AC 8V ~ 16V
1 x Pre-Amplifier Board