Best ones I've ever used are Holosync CRI 400, the earbuds, the bass is amazing. Bought over 20 diff brands including Shure, Sony, fiio, etc and the CRI 400 is really good. What differentiate it is that it can go down to 5 hertz on the frequency response while most headphones can only reach 20 hz. The pioneer flagship headphones also go down to 5 hertz but I haven't tried them myself
