Tboooe, I mostly felt I could use some more control in the bass, and a more dynamic sounding amp. I think the "jump" has to do with the more dynamic sound, but they proberbly have much more power, even in a 8 ohms impedance. I do not think I listen to music very loud. If possibly I think you should try a pair of the new XA.5 amps, I am sure you will find them even better and more powerfull, than your superb sounding XA160's.