I can't speak for the 5 stop version but the 6 stop
is two different keys, C and D for example. Only 3 sets of reeds per key, 3 up and 3 down for C, reversed for D.
Impressive! So you could buy 2 Falcon boxes to do the work of 4 accordions. 1 could be Bb and C, and the other could be D and F, or whatever key combinations make sense. So three reeds per key, lo, medium, and high? I wonder how that effects the ability to cajun tune it (1 reed 10 cents off).
You could but then again you'd also be spending 3000 bucks per accordion and they wouldnt be nearly as loud as a four stop model. They are ok I guess if you only plan on using them for gigs but you can kinda notice they're not as powerful during jam sessions.
John
The 5 stops are something that was done to add an extra row for what ever reason you want. It can be a dry tuned 4 stop or a wet tuned 5 stop. As far as volume on a 3 stop, I have a C-D that is 12 years old, that is as loud as any 4 stop that it has ever been in company with, and didn't require as much air as some.