SYMFONIA 12V DC 4 TR High quality Dual channel bass and treble controller circuit board Sound Recorder and Sound Circuit Electronic Hobby Kit

This is a mini tone controller circuit board. This is an optimized version of the passive preamplifier tone board. It has no potentiometer for bass and treble control. So, we recommend not to use this board if you don’t have proper knowledge about this board. This board provides excellent tuned bass and treble. The sound quality is very pleasant. The best feature of this board is that you don’t need any transformer for this board. You can easily achieve high and low tone adjustments without any transformer power supply.