Ayer reports "The overall Ayre EX-8 2.0 upgrade doubled the number of output devices and capacitance for the output stage of the amplifier. The more capacitance, the better, and the doubled number of devices helps the EX-8 2.0 drive harder-to-drive and lower ohm speakers more effortlessly and lets their benefits shine. Ayre also optimized several places in the Diamond circuit that we discovered after first releasing the EX-8 that overall improves the sound. In all, the EX-8 simply sounds like it has more power better range. Bass feels stronger and the mids clearer without losing any of the resolution it had”.
I hope this help.