I have the KSC-75s and I love them. After seeing a review I thought I'd also try these out of curiosity.
Much more comfortable than I thought they'd be, as I expected to have to open up the headband a bit. No need and I'm 6'3" with a large head.
Initially they are a little 'warm' sounding and lacking the top end sparkle, but a simple bit of EQ and they come alive.
Deeper bass than the KSC-75 and possibly a little less detailed, but altogether still an absolute bargain.
Forget your Sennheiser HD25s and the B&W series. Save your money and buy these!
Review by Hutch /
(Posted on 8/27/2019)
Smooth Warm sound but lacks the high frequency details I love.
Overall
I love the sound of KSC75 but not the slip over ear design. Some will love the smooth warm sound of the kph30i, but I need the high frequency details that the ksc75 has and these cant do that. The bass is boomy in the mid bass range. Koss please please do a version. Of this head phone with the titanium coated ksc75 driver in it and you will strike gold..
Review by Starfinder /
(Posted on 8/25/2019)
Stunning Performance for $30!!!
Overall
Purchased these on a suggestion from a audiphile friend at audiocircle.com. I was very aprehensive, but $30 is not much money to try something new. So far these new KPH30i's have made me smile more so than with a $1000 pair of Beyer T1's! They are light, fast, great sounding, natural, have an ability to dive into the details of a song...so lifelike. Lars Erstrand, Jazz at the Pawnshop. Larry Carlton "Discovery" have never sonunded so good....absolutely full of Koss Magic!! Thanks for such a sweet set of headphones that dont break the bank!!
Review by lost33 /
(Posted on 8/13/2019)
Great performance for the Price!
Overall
I got these and the philips shp9500 to test them out and I ended up returning the SHP9500. The sound quality is almost the same with the KPH30i been slightly more muddy but with more bass. I couldn't justify spending $50 more for the SHP9500 compared to the KPH30i. Really happy with my purchase. I use them almost every day for Gaming on my Computer for about 2 or 4 hours gaming sessions and then to watch Youtube as well and Youtube Music.
Highly recommended.
Review by ProphetAlpha /
(Posted on 8/1/2019)
I just received the headphone and I’m in love!
Overall
I have many headphones and even though I’m not the expert audiophile person, I love music and I always listen to music when I work on my professional as an artist. I always use headphone for a very long time. This is the first Koss headphone I decided to get because how nice of the vintage look, somehow it’s really charming to me. The sound quality and bass is absolute outstanding. I just have to share that I love it !
Review by Tida /
(Posted on 4/26/2019)
koss keeping good products at affordable price
Overall
i am a koss user my first koss product was the portapro with amazing results, but now moved to this new poduct with the same amazing sound quality good construction , lightweight , the you tube review doesn’t gail said the true about this product , i recommend this product to anyone what like good price in affordable price
Review by Radiomegahertz /
(Posted on 1/7/2019)
Better than expected!
Overall
I bought these from Massdropo out of curiosity as I already own many expensive headphones. I and the friends and family that tried them were all surprised with their sound! OK, they won’t sound like Fostex 900 neither like MEZE 99 but for the price paid and the nice retro look they offer much more than you expect! My first order was for two intending to give them to my twins. I ended up ordering three more, one for me, one for wife and one for my older son! They all loved them. Buy a piece and you won’t regret it!
Review by SMF /
(Posted on 12/4/2018)
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