http://www.head-fi.org/forums/f4/sony-ex90...-thread-193464/

I tried it and it now sounds more like my MDR-A34's, only with more isolation and better definition, but more bass!!!

I remember getting incredible bass, and realism one night about three in the morning. Couldn't sleep, put Radioactivity by Kraftwerk on the Kenwood 750 turntable, plugged my Sennheisers into the Kenwood 100 watt amp, let her rip, thought wow, these phones always sounded good, but never this good, must be the total quiet of the apartment, or something. Happened to glance at my speakers about 20 minutes in and saw the light on. These were Heco triamped speakers, forgot to turn the power off. Manager lived above me, nobody ever said anything about the strange sounds at 3:00 am, phones never sounded or felt as good after that.
TTFN
Bob