ePanorama audio circuits


Audio amplifier output relay delay

Audio line isolator

Dynamic microphone to electret microphone input

Electret microphone powering circuits

Line level signal to microphone input adapter

Simple circuit to connect telephone equipment to audio mixer

Simple line mixer

Simple two line output combiner

Simple microphone preamplifier

Speaker signals to line level inputs

Use amplifier phono input as line level input - inverse RIAA filter