TL084: low noise OP-AMP in cheap. Use JFET input. Why popular in audio & a lot of circuits: wide bandwidths and fast slew rates. Example:
If you want to learn about microphone or little use. This is a simple condenser MIC preamp circuit diagram. It changes the sound to electrical signals before sending to a…
This is Low noise microphone preamplifier circuit using IC-NE5532, M5218P. Simple circuits but high quality balance-Unbalance Input for dynamic microphone
The active microphone preamplifier circuit for the particular condenser microphone, high sensitivity - high output signal than other, but need power supply..
The Dynamic Microphone Preamplifier circuit. So low noise signal,use three transistor (2SC945, or 2C1815 or 2SC828) is transistor amplifier with a low noise [...]
This is cheap & small hearing aids circuit,use increase sound to head phone with 1.5V AA battery, and all transistor and a few components with small PCB [...]
This digital echo stereo mixer project is circuits pioneering in echo circuit before using IC-BBD to the digital system. By using digital echo circuit