well..im a little confused..if ur asking about feedback about ur the mic placement in ur mp3 or if ur just asking in general, but regardless..today i happened to have been messing around with my setup, but still found that my current setup is the best. Have a dynamic mic in the cone, pretty close to the amp itself...that gets the clearest, brightest sound. ALl the others i tried(side of cone, facing in..top of cone, facing towards center) just dont sound so clear. But if you do that, your also gonna want to have a condenser microphone behind it..(I use an MXL 990, about 5-7 inches away from dynamic mic)...to pick up the mid/low sounds...and ambient sounds. Thats how do my recordings...also my dynamic mic is a digital reference mic(getting an SM57 soon enough..hopefully haha). Hope that helps