Product description
The unbalanced to balanced board designed with BB's enthusiast DRV134 chip can be used to match the power amplifier board with differential input (balanced input), or it can be used as a dual-channel power amplifier board to change the BTL output. The power supply part adopts LM317+LM337 adjustable regulated power supply, and uses 4 imported 2200uf filter capacitors to ensure stable performance.

Note
The board has been shipped and debugged. The power supply defaults to a dual 12v operating voltage, which is suitable for use with dual 12v transformers. If you use other voltage transformers, you can properly adjust the output voltage on the board (the positive and negative power supply jumpers should be used when adjusting. Remove the cap to prevent the DRV134 chip from being burnt out due to asymmetrical voltage). Generally, the voltage can be adjusted to as many volts as the voltage transformer is used.

If you don't want to adjust this voltage, just use dual 12v-15v transformer to supply power.

Adjust the test point
connect one test lead to GND, and connect the other test lead to the jumper pin.

Package inlcudes:
1 x DRV134 unbalanced to balance board
3 x cable