I will preface this by saying that I do work for Skullcandy, but I think this is one of our best outings since our acoustics team started last July.    Also, the bleeding ears is fun marketing speak, but these headphones may actually be better for bassheads than previous offerings.  The...

The headphone chapter in the Loudspeaker and Headphone Handbook is the best I have read.  Really in-depth, though.

Some amplifiers use a coupling capacitor at the output to block DC bias voltage in an amplifier from being passed on to the headphone or speaker.  This DC bias could displace the diaphragm from a centered position (and may cause the voice coil to heat excessively).  Attaching a headphone to the...