A small project to measure speaker with an electret via USB
If you would have more information about this project please visit www.audiyofan.org
A link to the dedicated post http://www.audiyofan.org/forum/viewtopic.php?f=57&t=8948
It's just a box connected via USB , you don't need an external sound card to measure your speakers,
You can use REW or ARTA ( free demo version ) or an other program,
The project is based on a capsule electret, a microphone preamp, a loopback and a second channel with a secured probe to measure the voltage across the speaker ( for ARTA ) connected via a PCM2904 from BB/TI
Under Linux & Mac no drivers is required Under Windows you can find in the folder "Drivers_windows" all you need to run this box properly
PCB & schema are designed with Kicad
All comments are welcome
Totof