Amazon.com: OneOdio Wired Over Ear Headphones Studio Monitor & Mixing DJ Stereo Headsets with 50mm Neodymium Drivers and 1/4 to 3.5mm Jack for AMP Computer Recording Podcast Keyboard Guitar Laptop - Black :
Ready Stock) Maono AU-MH601 50mm Drivers Professional DJ Studio Monitor Headphone Over Ear Driver for DJ Studio, Audio, Headphones & Headsets on Carousell
Has anybody compared sound between 40 mm cup headphones to 50mm? | Headphone Reviews and Discussion - Head-Fi.org