As a followup to my threads on THD, DEP parameters, and frequency responses for HD500x amps, microphones, & cabs, i finally completed the THD & frequency response measurements of the model paks. You will find them here, since the 340k file is too big to upload to this forum (?).
What I found most interesting was the presence (or absence) of 60/120 cycle hum. It seems in these older models you get the 60 cycle hum whether you want it or not. I indicated which ones were clean and which ones had hum. It would have thought it would have been such an easy thing to add a DEP parameter to adjust these.