I have a pair of such noise reduction earbuds, it sounds OK. I wonder if it could be further optimized, so I opened it and found a quite complex circuit with several variable resistors (at least 3 from memory). Of course no markings on them.
Is there any method for adjusting it for max noise reduction? What could be the function of the variable resistors? A schematics would surely help. Thanks.
Is there any method for adjusting it for max noise reduction? What could be the function of the variable resistors? A schematics would surely help. Thanks.