What is your Gain set to and are you clipping the Input or Output?
If Gain is set to zero, is it still dirty over headphones?
Are you maybe running your signal too hot into whatever follows the PROFILER?
On my clean setting (profile of CAE 3+SE clean channel not pristine. Has a little harmonic stuff going on but nowhere near even semi breaking up) Think gain is about 2.? Even when turning the gain to zero, the Leslie is a grittier sound on top of it. I am going into an Behringer X32 (with headroom to spare before hitting 0db on the meters) into a Turbosound system supposedly rated at 11kw on paper.
My clean sound is not breaking up, only the Leslie sounds slightly crunchy. All other chorus, micro pitch etc are working cleanly. Even messed with the vibrato effect and got closer to what I needed as it was at least clean.
Off down to the studio in a while to give a few ideas a go.
Thanks for the reply.