Lo scenario
A compact phantom-powered binaural microphone preamp needs to boost low-level condenser mic signals while keeping noise low and offering switchable gain for different recording levels.
Cosa contiene questo disegno
Leggi le decisioni che ne stanno alla base.
01
Use OPA2134 dual op-amp for low noise and dual-channel binaural operation.
02
Provide 48V phantom power through 6.8k resistors to each electret mic capsule.
03
Switchable gain via SPST switches engaging a 100Ω resistor in parallel with the 1kΩ feedback shunt.
Reusable for portable battery-powered binaural recording rigs, head-worn microphone arrays, or stereo ambience capture where low noise and adjustable preamp gain are required.