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

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

Diycart Dual Microphone Input Preamp Kit for Audio amplifiers with pre-soldered Mic sockets