Excellent headphones. If you want a review from someone who has used them for years, check out DarkViperAu. He has worn them out.

They do what I wanted. Minus one star because they tire the ear and irritate the spot where they touch, a cushion is needed

The 32-ohm headphones are designed for mobile devices (phones, laptops) to provide high sound volume with low power, while the 60-ohm (or higher) headphones are generally suitable for studio or Hi-Fi systems, offering better sound, detail, and less distortion when paired with an amplifier

Edit (26/05/2026): After one earphone of the second pair of headphones started to make 'static', I decided it’s not worth it. Spend a little more money to get headphones with a more stable cable construction.

They have good sound but no sound isolation at all. Also, you need to be careful with the cables because they are glued to the headphones (strong glue, but if you accidentally pull them, they come off and then the earphone doesn’t work). Of course, this didn’t bother me much because mine only broke after very rough use. When I had them connected only to the computer and didn’t unplug them, everything was perfect.

Also, in the summer they don’t make me hot at all, they’re just right for the summer months. Now only the right earphone works. But overall, the value for money is very good.

Excellent headphones, the best I have that cost under 25eur. The only negative is that they don't have perfect bass, but it makes up for it with the extreme soundstage :) It's a shame they don't have detachable cables (mmc), but if you want, you can install them yourself with a little work. Sometimes if a hair gets into the driver it makes noise, but it's very easy to clean. They are the most comfortable headphones I've ever worn, I've had them on for 14 hours and they didn't tire me at all. I've had them for 1 year since 2024

If they had 1) a microphone 2) a headset 3) better cables, they would be perfect. As for the sound, you'll be amazed when gaming...

Guys, the headphones are incredible. They remind me of the headphones we used to have in English tutoring for listening. They are simple in construction and the cable seems delicate. However, their sound is of very high quality! They were recommended to me by someone who owns expensive equipment, and I couldn't believe it. The way they hook onto the ear is a bit annoying, so I ordered a headband to wear them more comfortably. Don't think about it. BUY THEM!!!

I bought these specific headphones after watching several reviews for Koss headphones. It is no coincidence that people appreciate the KSC75 as well as the Porta Pro so much. First, I want to say that the sound is very clear; it has nothing to envy from headphones of other categories. On the downside, yes, the build quality is not the best, the cable is quite sensitive, and I don't know how long it will last. Also, these specific headphones have almost no sound isolation. I have had the headphones for a week; I can say they are very comfortable and relaxing even after many hours of use.

- I wanted a headphone with the largest speaker diameter, without a headband and to be outside my ear. Rare are the possible options.
- Once again, it is confirmed that size matters. The diameter of the speaker they have in relation to those that "go inside" the ear results in such a low price to hear with good sound quality.
- They do not tire during long use. The support mechanism they have works as if they are hanging from our ear and is very soft even after many hours of use.
- The sound is good for the money they cost.
- The foam pads are washable.
- Those who can and want, should change the cable and the plug they have from the manufacturing company, with better quality ones

Only 4 stars because while their sound is very good, the quality of the cable is terrible, resulting in it breaking every year and I end up buying a new pair just for the cable. Unfortunately, there aren't many headphones like these that don't isolate your ears and don't tire you at all during long use.

If you bought them, you know why you bought them. No, the build quality is not good. No, they do not have good insulation. No, they do not have crazy bass. What they have is a comfortable design, with excellent (relatively balanced) sound and depth of sound at a very affordable price. They are legendary and take very good mods. I highly recommend them if you know why you are buying them.

Only for gaming. I hear sounds that I never heard with cooler master mh752, corsair hs80 wireless in warzone 2.0. Comfortable with prescription glasses and very lightweight. Dirt cheap price. Bought it for fun with 26 euros. Durability will show...

At this price, it's hard to find such sound...
It doesn't even need a portable amplifier.
...what it needs is a mobile phone with an aux...
Very satisfied!

Fantastic headphones especially for their price. With 20 euros, they easily reach the sound quality of headphones that cost 100+ euros (except maybe for the bass). Perhaps the best value for money headphones available.
They are not designed to isolate the sound, which worried me because I was used to the Hyper Cloud, but they easily cover ambient noise at medium volume. The only issue is if someone, for example, sits right next to a train/plane, they might be able to hear the sound of the headphones a little, and the noise might bother them, but this only happens at high volume.
The main problem is that they are somewhat fragile, especially the thin cables, so they require more attention to avoid sudden pulls. I had one cable break after 6 months of use and had to buy new ones, but they were so cheap that it didn't bother me much, I just take better care of them now.

Excellent sound. Very satisfied. Very comfortable and they don't heat up the ear in the summer.
Not recommended for outdoor use if there is noise (cars, dogs, etc.)

I have bought them for VR gaming and they are the best. It is true that they may not have the best sound isolation, but in my case, it is a positive thing. I never expected such good sound from such cheap headphones, but I was thrilled. Don't think too much about it, it's worth it.

What headphones are these??? I'm amazed, I didn't expect them to be so good despite the many positive reviews I read. Of course, with a decent DAC/Amp, my Pixel 3a just makes them whisper... With the Fiio BTR5, they simply excel! I'm blown away, incredibly enjoyable sound. And unbelievably comfortable. A steal. Everyone should have a pair!

We buy these headphones. We install the apo equalizer. We give a 3db boost from 55hz to 100hz. We lower 5-6 db at 5khz and we have headphones that play with deep soundstage, incredible vocals, and punchy bass. I have more expensive headphones like the Sennheiser HD 600. However, for the money and with the equalizer improvement, it plays really hi-end sound. Get it guys, it's really worth it! A little gem UPDATE! don't do any of the equalizing I mentioned. Download Sonarworks and select the Koss KSC 75 model and the value for money becomes insanely crazy! If I find something cheaper with such crazy performance, I will come back...

The headphones have mid and high frequencies that you can find in headphones of €100.. the lows are not bad but due to their construction (open / no seal anywhere) they sound weaker compared to the other frequencies. To cut it short, for €20 they are the best headphones for listening at home or work.. if you want something that isolates sound, they don't do that.