I just upgraded my speakers from the HTIB Onkyos that Circuitcity sells to a JBL EC35 and E50s for fronts and rears. While I really like the sound of the JBLs it seems like I almost have a headache after listening to them for more than 10 minutes. The receiver I am using is the Yamaha HTR-5560 which is the same receiver I used with the Onkyos. I had the same problem with the Onkyo's as the JBLs in that I would get earbleed after listening to them for so long. Is it possible that my Yamaha is just too bright for these speakers and that is causing the problem? Would a warmer sounding receiver be better?