Hows the sound quality compared to Koss PortaPro?

I have both KSC75 and PortaPro. If I don't do a A, B comparison I enjoy both, they both sound excellent. If compare them A to B, I like the PortaPro's the best, they have a warmer sound good vocals smooth high end, very musical. The PortaPro's also fold up and will fit in a large pocket of a jacket or coat. The KSC75 have ear clips that I did not want to fool with , I just unsnapped the drivers from the clips and clipped them on an old headband I already had. The KSC75 is not as warm sounding but the base is still there, a string base still sounds good. Vocals sound very good and the high end may be a bit brighter. Both are 60 ohm headsets so they are easy to drive with portable devices like cell phone. They do have different drivers, KSC75 are Titanium and I think the PortaPro are Mylar. The sound stage my be a little bigger and sharper defined on the ProtaPro, but only apparent in A, B comparison. Remember one costs around $15 and the other is around $40. I like them both.

How / whereabouts is the volume controlled?

There is no volume control on the head clips. The levels are adjusted at the source machine, but you can probably find or make a separate cord with a spin-knob to regulate volume which would fit between the source and the clip jack.

Will these work OK when wearing eye glasses?

I where prescription shades with a thicker side walls, and thin regular glasses, and works for both. I fit the units on first then the glasses find a way to fit around the headphones.

Would these be good for running?

Absolutely. I've been running with mine for almost seven years, and am just now going to replace them because the foam has deteriorated. (Replacement foam is about half the price of a new set of headphones, so why not?) I'm not an Ironman, but I jog - not walk. Maybe 9 minute miles or so if that gives an indication. And I run trails or the beach 95% of the time, so the jostling/direction change/etc is certainly more than just an average street or treadmill run.They are slightly loose when you first get them, but as somebody else pointed out, it's wire that can be slightly adjusted for the perfect fit. Yes, mine have popped off a few times when there was tension (by design), but maybe 10 times in 7 years? I can live with that.The thing I like best is the sound. It isn't $300 level sound, but it's a heck of a lot more than $15 sound. Oh, and I'm a gadget guy, so I really, really wanted Bluetooth headphones to work and not have to deal with the cords. But I haven't yet found good Bluetooth ones that aren't in-ear, which means that upon every stride (for the in-ear), I hear thump thump thump. I'm sure there's some good on-ear Bluetooth out there, but for the price of these with a very mild inconvenience, I'm buying a new pair when I finish typing this.

Control Type	Media Control
Unit Count	1.0 Count
Item Weight	43 Grams
Is Electric	No
Compatible Devices	Cellphones
Cable Features	High fidelity clip headphones Exceptionally wide frequency response Computer-optimized neodymium, iron, and boron rare-earth magnet structures deliver amazing clarity at any volume Include a straight, dual entry, 4 foot cord with gold-flashed 3.5 mm (1/8") plug Pivoting clips promise accommodating fit Enjoy greater volume despite low-voltage portable devices Covered under the Koss Stereophones Limited Lifetime Warranty
Additional Features	Sports-Style
Enclosure Material	Plastic
Specific Uses For Product	Sport
Headphone Folding Features	On Ear
Headphones Ear Placement	On Ear
Style Name	Single
Color	White/Gray
Wireless Technology	Bluetooth
Connectivity Technology	Wired
Headphone Jack	3.5 mm Jack
Frequency Response	15 Hz
Sensitivity	101 dB
Impedance	60 Ohm
Noise Control	None

Koss KSC75 Portable On-Ear Clip Headphones, Retro Style, Ultra Lightweight, Silver and Black

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