SYMFONIABass Treble Control Passive Equalizer Board with LM324 IC Electronic Components Electronic Hobby Kit (Pack of 1).

SYMFONIA -Bass Treble Control Passive Equalizer Board with LM324 IC Electronic Components Electronic Hobby Kit (Pack of 1).

Electronic Spices 3 Channels Preamplifier Tone Board Audio Bass Treble Control Equalizer Board works on 12-0-12 transformer and better IC