Emile mentioned that the extra unfiltered output is a nice bonus that costs very little to add. I'd like to add that adding multiples of each alternate filter would have required the implementation of entire additional filter sections with expensive parts which would have resulted in a larger device and much-elevated cost. We have contemplated this very thoroughly and ultimately decided on the current configuration. Normally, you’d likely use at least 1 default filter and the other would be unfiltered, default, or alt 1 or 2.What is the rationale in providing two unfiltered outputs? I ask because given 6 outputs, it seems another choice could have been 2 each of filter 1, 2 and 3.