I am wondering if anyone here has any insight into this. I run my POD HD500 (Output mode: Poweramp Stack, speaker/mic sims:off) into a powered mixer with all eq flat on it, then from the mixer into a 2x12 cab packing WGS Veteran 30s. (And don't worry; the mixer's speaker outs require a MINMUM 4 ohm load, and my cab is 8 ohms, so I'm covered there :D) I've been having a hard time dealing with using the full amp models in this fashion, as it sounds very fizzy unless I really turn down the treble/presence controlls . One benchmark I have is the Recto model, as it doesn't sound nearly as good as when my friend ran his Mesa Roadking into the same cab on channel 4 in modern mode (basically working as the same recto modeled in the HD). HD Recto full model sounds very fizzy in comparison. With that in mind, does anyone know whether or not the full models (in either poweramp output mode) are actually optimized to compensate for tonal changes that result from running into the power section of a tube amp, or does L6 have some work to do on refining the HD's representation of the higher frequencies in their models? Thank's in advance for you guys' time. :)