First listen was done with my Grado 325is which i am familiar with their sound and the difference was immediately apparent in the sound separation and the sound was much less fatiguing than on my ibasso dx50 dap. Began listening to iBasso SR1’s and was surprised at how much difference it made having a more responsive and accurate headphone to take advantage of the cleaner feed i was receiving from the Playmate. Made some personal audio trades with some friends with v6 vivids and classics and now have the Everest setup for myself. I have been blown away with the quality of the Playmate and plan to stick with this setup.