All,
I received a pair of KOSS KSC9 and KSC75 phones in the mail this afternoon.
Well, the 9's sure are lightweight, I'll give 'em that. The cable itself is the very lightest I've ever seen on a headphone...even thinner and apparently more fragile than any ear-buds I've ever worn. The phones themselves are also light, though not as featherweight as buds. The black portions of the phones, meant to go behind and under the ear (to act as a counterbalance, I suppose), are properly flexible; it's easy enough to bend them just perfectly to position the drivers deep in the pocket of the ear canal, thus increasing the bass response as much as possible. These are actually pretty comfortable phones, unless you want to wear them with a cycling helmet, that is. Once I strapped on the chin-strap, I discovered that the straps that fit around and especially under my ears ride exactly on top of the phones, pushing them painfully into my ears. To make that problem worse, I can find no way to slip any foam bud-pads on and have them stay in place. Without a helmet, however, they're not bad. They seem to stay in place pretty well. Perhaps if you're a jogger and not a cyclist...
However, the bass is woefully absent. To make matters worse, I think these are the brightest phones I've heard in a long, long time. Way too much treble...way to much...cymbals give me a headache in less than the time to hear a single song. Perhaps if I were listening to an older cassette player with the Dolby turned on (which tends to lower treble), it'd balance out. From digital sources it's just too bright.
They cost me $10 and that was about $9 too much. I think I'll give them to a friend of mine. Perhaps he'll like them, though I doubt it.
On the other hand, the set of KSC75 phones that came in the same shipping box are wonderful. Nowhere near as light as the KSC9 phones, but everything else is superb. They stay on the ear well (better than my KSC35's), sound way better then a $15 pair of cans ought to (or a $50 pair for that matter). I have no trouble with my helmet straps either; no part of the phone extends under the ear to get caught. These are truly sweet phones, as most of you already know. I cannot recommend the KSC75 phones highly enough when you want something light and portable, especially for exercising.