1MORE Quad Driver In-Ear Headphones @ TechPowerUp
 

On the wings of the raging success they had with their $100 Triple Driver In-Ear Headphones, currently considered one of the best IEMs in terms of price-performance, 1MORE brings us their even more refined sibling equipped with an additional balanced armature. Do the 1MORE Quad Drivers have what it takes to justify a price bump to $200?

https://www.techpowerup.com/reviews/1MORE/Quad_Driver/