Excuse my late reply. I'm about 4 months behind and am catching up now.
chad_kettering writes:
>>Does anyone with a 440 Filter know if there is any noticeable
filtering in the upper freqencies or coloration/noise added to a
signal if one were to use it as a mixer with the cutoff wide open?<<
I sometimes use 440's or 420's over the motm mixer just to avoid some of the annoying and hard to remember parculiarities of the motm mixer. The 440 sounds fine when the filter is all the way open. I haven't noticed any loss. The 440 won't chop your votages down to a fraction of what they should be like the motm mixer (which may explain some of my failed feedback experiments now that I know what's happening). In fact you can boost 10 volt signals up to about 26 volts peak-to-peak with the 440 at about the 7.5 tick mark location. Beyond that the signal will start to flatten a bit.
-Elhardt