Excellent airy sound with crisp highs and nice bass/
Overall
These headphones just get out of the way. Put them on and forget about it. Not quite the intoxicating experience as my Portable Pros, but for the price they are incredible. I recommend loosening them up a bit overnight, letting them stretch over the included box. Highly recommended.
Review by Joe /
(Posted on 7/16/2018)
Great long lasting sound
Overall
Really good sound.I dont have many headphones but it sounds better what I have.They last a long before thay broke but I will be buying more from koss.
Review by Discojet /
(Posted on 5/13/2018)
Great!
Overall
I got these from massdrop and also own the Portapros and KSC75...as well as 50 other pairs. These are fabulous.
First, they are very comfortable.
Second, they incorporate some great design ideas such as the rubber liner in the headband, the nifty remote button, and the spring strain relief. I also like the flat earpods.
Third, they sound open, airy, and fluffy while have plenty of dynamics.
A real winner for me.
Review by Otto Motor /
(Posted on 1/8/2018)
Really quite good.
Overall
There is nothing really wrong with these headphones. They have great bass decent mids and decent highs. They sounds balanced. It has a decent soundstage. Nothing stands out as really wrong. I love them for on the go. The mic is a nice touch and I can't believe how good it sounds for the price. These are really good headphones.
Review by Juan /
(Posted on 12/18/2017)
What can I say?
Overall
These must be heard. They are incredibly spacious sounding headphones. I can't believe they are so inexpensive, so comfortable, and so good sounding. You cannot go wrong with a pair of these phones. So pleased with my purchase. Thank you Koss.
Review by Richard /
(Posted on 11/2/2017)
The KpH30I Brings you closer to the music
Overall
I tried on my new KPH30I's and was really happy at how light they are. Then I noticed the chord wasn't a really thin flimsy one. The chord was rugged and had an inline mic. I plugged in Tom my iPhone and dialed in some classic Jazz on Spotify and the next thing I realize is that an hour has passed. Wow! The reproduction of the music with the KPH30I brings you into the songs and I was amazed how I felt that enveloping feeling as I was listening to a mix of live and studio Jazz. So at this point I think I have to play an album I am very familiar with. Frampton Comes Alive. And wow again! This is an album I know well. The KPH30I's grabbed me right into the stage mix. Hearing the subtle guitar effects Peter Frampton utilizes was easy I am very excited that a special headphone has been made by Koss. I want to play a lot more albums with these on. And that's the whole point isn't it? For reference, I own Gradi 325i's and Sennheiser HD600's. As well as Bose and other Koss headphones. Headphone amps and stuff too. I'm recommending you buy the KPH30I and find your passion again.
Review by JohnM /
(Posted on 10/7/2017)
15-25,000 Hz 
60 Ohms 
101 dB SPL 
4 foot 
Limited Lifetime Warranty 
John C. Koss, Founder