These were the only replacement earpads I could find for my Pioneer HDJ-X10 headphones, so I took a chance on them. Wow, I'm so glad I did!! The shipping took a few weeks, but it was worth the wait. These earpads are MUCH better than I had expected, and much more comfortable than the stock earpads.These earpads make my headphones SO much more comfortable! The stock earpads (Pioneer’s nanocoated HC-EP0501 earpads) are too thin, and they pressed against my ear (see the photo). After awhile of gaming or listening to music, my ears would ache. Ugh.These earpads fix that! They also feel like I’m putting on soft, fuzzy earmuffs, or like a cozy blanket for my ears. :) I smile every time I put them on. They are also super cushy and put less pressure on my jaw joint, which reduces tension and probably lessens my tension headaches.About the sound quality, I didn’t notice any decrease in sound quality with these earpads. To my ear, they sound the same as with the stock earpads. But I’m not an audiophile. (I mean, my audio quality test tracks are Flo Rida’s Good Feeling and Lil Nas X’s Old Town Road.) I leave it to others to comment on any changes in sound quality.11/10, highly recommend!