Hi, first time posting in many many years.  I am looking for some IEMs for my Iphone 4.  For headphones, I currently own the Sennheiser HD580, the Koss PortaPro, and the Klipsch S4i.  I like a little extra bass, so I went with the S4i recently, partly because it seems to be more robust/reliable...

Hey, can I wear the KSC 35's under my bike helmet? Will they fit? I realize that the 35's don't really go into my ear so I'm concerned about how much they protrude out and potentially interfere with the helmet. (Now, whether or not I should be mountain biking with phones on in the first place is...

Are they even comparable? I've been loving my Sennheiser 580s for a couple of months now, but have found them a bit awkward and funny looking to carry around with my portable CD player as I walk to my office, and totally unuseable if I want to work out with them. So I'm thinking of getting a...

What is the best bang-for-combination of portable disc player or portable disc player + amp for my new HD 580's? This is mostly for use in my office. Thanks for your help, Young