Thanks Gonk,
Found out my low bass is now very clean and tuneful, so there's no need to save different curves.
I made a sort of sub volume control on my Pronto to select 10 through 35 in steps of 5 on my SMS-1.
That's easier than changing the sub's or 990 settings.
Also I macro'ed "DVD Movies" for a different volume setting than "Stereo" and "5.1 direct".
Very happy now, the SMS-1 is a very clean sounding unit.
Oh, BTW, I changed the fronts crossover back to 80 Hz and 80 Hz on the SMS1 as well, somehow this sounds clearer...
Incidentally, I found out when further experimenting with XLR cables that ít's a no-no to make them longer by putting two in series, or use single screened cables.
Hum WILL result!
I think that's because XLR is usually used on 0 dB or higher levels where that doesn't count very severely...