Which to prefer and why? My old 'Sennheiser PX-200 II' have recently worn out, probably at the connection to the plug :-( I've tried and like both pairs, I'm thinking of getting the AKG but I'm not sure.

Iv'e created a waveform of a 1HZ sin wave. I thought my headphones should audibly produce silence, however during the peaks of the wave they produce high frequency sound. Am I hearing the effort of holding the speaker center at the farthest and closest points, preumably if so then this is the...

I own a pair of Sony's MDR-710 and I love them although I found mainly negative reviews, the complements stop at the looks. Clearly having supposedly poor (or at least moderate) leaky audio is a bad thing. The fold up mechanic are a per person thing, nobody likes getting poked in the eye...