Very fast and responsive. Item in great condition.

That is some noice color

I have 2 version, one is the previous mems-3s and the new one, the older one is less bass more treble, it reminds me of annihilater. And the newest version is well ton of bass. The energizer pair well with portable dac/amp with high power output. I found out they react very well with sufficient...

I have the universal version. What I can say is they does not go well with dongle, the only dongle that I've tested without any issue is Cayin RU7. Now I'm using Shanling H5 with Mems-3 for portable use, and it work wonder. The bass sometime might be too much to handle but overall verry good set.