Bill

I have seen alcohol take the patina or gloss off of certain plastics, be carefull buy new earpads

I dont buy used equip. espicially something that attaches to your body, but that is just me. I would say look at sealed units with good isolation figures from Senn,AT,AKG that are low imp. so they work on portable gear and spend as much as you can...

Any suggestions for PRO headphone amps, rack mountable Thanx Bill