circuit

I've always wanted to build my own headphones and was curious if anyone here has any experience or tips as I am not sure if the circuit can work. The components I will use are as follows: Breadboard Battery ceramic capacitor Resistors polar capacitor BC237 NPN transistor BC239 NPN transistor...

Hi Everyone Greetings One of my friend purchased an used qp2r from a local shop , it was not turning on , after thorough inspection and resoldering quite a few components the device is working . However as I don't have the schematics it seems that some repair work on the PCB has been done . Now...

I've been reading up on a lot of IEM making, tech and manufacturing involved in the process. I got myself a general clue as to what to include, how to put it together, what materials / shape to use, how the canals and delivery impact final sound but there's one thing I haven't found anything...

Last week I had my electrician come by to (finally) install a dedicated circuit for my headphone system. He was working me in, and when he got here he had a “better” idea for routing the cable, and of course he was in a hurry. Which was fine: I’m just glad he came. I thought we would run the...