I have not.  I'll give that a try!  Thanks so much.

I'm currently using the ATH-M50s cans as well as the FiiO E7 Amp/DAC through an older set of Logitec 5.1's.  I'm happy with the sound overall, but I have a few questions.   I get quite a bit of hum through the FiiO at loud volumes.  The FiiO runs through an external Logitec volume...