I almost always use my samson sr850s and was a little disappointed with my jvcs. So I gutted the jvcs and replaced the stock drivers with the drivers from my broken ur40s. All I can say is awesome. Much better than either pair before. They are a little bass heavy, but I havent messed with any dampening yet. The highs and the mids are very very nice. The bass is nice and punchy and extends very well... just a touch to much though.