As of now you will not find a better portable headphone than the Sportapro. Sound quality, fit and price is fantastic.
Review by Lt /
(Posted on 12/8/2017)
Quality Sound, Fair Comfort
Overall
Cons: The adjustable slides on the headband can apply put pressure on top of the head when fully opened. If you take these on and off you may find yourself readjusting the slides before putting them on again. With extended wear while sitting you may notice a bit of pressure from the temple pads that may be fixed with some headband adjustment.
Pros: Sound. The product is lightweight, portable and seems to have sturdy construction. I primarily use the UR-40 and bought the Sporta Pro as a gift. When I tested the Sporta Pro I noticed plenty of clarity from lows to highs. The mids of the UR-40 are either recessed or the Sporta Pro is mid-to-bass heavy. I noticed this when I spent a day with the Sporta Pro and heard male voices on a podcast and they seemed to be really prominent and in your face whereas the UR-40 doesn't seem that way. The Sporta Pro though is supposed have a very accurate sound like the Porta Pro and KSC75.
If you are quite active and want your music on the go or when you exercise with quick on-off capability (especially for one ear if you need to hear someone quickly and easily), choose the KSC75.
Review by Wayland /
(Posted on 2/29/2016)
My second pair of PortaPro
Overall
Very nice headphones, but wires inevitably break
Review by K5 Blazer /
(Posted on 1/19/2016)
Superb puchase!
Overall
I am really happy with my Sporta Pro! And my friends are impressed too (my girlfriend keeps "stealing" them from me). Everything is good about them, they fit nicely on my ears without putting to much pressure, they look great and sound fantastic. I was recommended to getting them at http://www.headphonesunboxed.com/ and I don't regret the purchase for one second, it's one of the best pairs of headphones I've ever tried!
Pros: Sound, Look, Fit.
Cons: The cord is a bit too long in my opinion, but not a big deal.
Review by Lotti /
(Posted on 2/25/2015)
sportapro's are a winner
Overall
these headphones allow long listening time without fatigue. excellent clarity and bass. very much like the big brother, The highly rated portapro headphones. These are workout headphones ane Portapros are for more critical listening..a great buy.
Pros: light, comfortable, excellent sound
Cons: none
Review by tbone /
(Posted on 4/21/2013)
My second pair of Koss Headphones
Overall
I really enjoyed this pair of headphones, I could not only hear the bass kicking, and I could feel the headphones tremble ever so slightly. This particular model is great for on the go listening. The only reason I do not still have them is because my niece pulled the cord and damaged the wiring.
Pros: Amazing sound and rich frequency response
Cons: The only thing I didn't like is the headband
Review by Sean Brouwer /
(Posted on 12/25/2012)
Great Sound, but Flimsy
Overall
These headphones sound great. I'm told they're sonically identical to the Porta Pros. But the construction is cheap and flimsy. I'm on my third pair. Sure, they're covered by the lifetime warranty, but every time I replace them I have to pay Koss $10, then another $10 postage to ship them to the repair depot. So essentially, the warranty costs you $20 to exercise. I've now paid about $100 (including the original purchase price) to keep my headphones going for the last seven years. I'm thinking of buying a pair of Porta Pros in the hope that they are a little more durable, as I'm quite tired of this ritual. I'm thinking of buying a pair of Portapros in the hope that they are a little more durable, as I'm quite tired of this ritual.
Pros: Wonderful all-round sound
Cons: Wires inevitably break
Review by Dave /
(Posted on 8/23/2012)
15-25,000 Hz 
60 ohms 
103 dB SPL/1mW 
Straight, Dual Entry, 4ft 
Limited Lifetime Warranty 
John C. Koss, Founder