I just updated the firmware on my HD 500x last night and played with it some tonight. I'm running it via L6 link into a DT25. I mainly use the "American Clean" setting and have to have the "master" volume on the amp set really low. Tonight, I set the "master" volume on the DT to about 50%, and used the "master" volume on the POD, to control the leveI. Might just be me, but I noticed enough of a warming effect on the overall tone, that I might have to re-EQ my patches... especially the dirty patches. All playing was done a relatively low volume, until tomorrow morning when the wife and kids will be gone for about an hour and I can crank it up a little bit.