Is it advisable to keep a set of cans directly on top of a loudspeaker? Could the magnetic field around the speaker interfere with the magnets inside the cans? For example: Alter their charge, or affect them negatively in any way? If so, how long would it take for any...

This subject was taken out of the thread regarding the request for "disappearing heaphones". Have you experienced an effect where the headpones themselves seem to disppear and leave you with just music, spatious music, that seems to surround you? A sonic hologram. If so, what is your...

How are different types of headphones designed? This has interested me. Where to learn more? There are many texts on loudspeaker design. Are there any good materials on headphone design? Is this something that can be acomplished without a truckload of special equipment?

What are your recommendations for the best bang-for-buck cans for techno? These would be used for recording/monitoring techno, as well as for some general-purpose listening. Tight imaging and low impedance are crucial. Tight bass and accurate/fresh treble are also very important. What are...