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.

ASIN	B0006B486K
Age range (description)	Adult
Best Sellers Rank	#12,232 in Electronics ( See Top 100 in Electronics ) #708 in In-Ear Headphones
Cable feature	Detachable
Compatible devices	Cellphones
Connectivity technology	Wired
Control method	Remote
Control type	Media Control
Department	Unisex-Adult
EU Spare Part Availability Duration	1 Years
Frequency response	15 Hz
Headphone jack	3.5 mm Jack
Included components	Koss KSC75 Portable Stereophone Headphones
Item model number	KSC75
Item weight	43 Grams
Language	English
Manufacturer	KOSS
Material	Rubber
Model name	KSC75
Noise control	None
Number of Items	1
Package type	Standard Packaging
Product Dimensions	16.51 x 6.35 x 16.51 cm; 43 g
Recommended uses for product	Exercising, Running
Sensitivity	101 dB
Specific uses for product	Sport
Style	Single
Unit count	1 Count
Water resistance level	Not Water Resistant
Wireless communication technologies	Bluetooth

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

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