First off, let me extend my sincere thanks again to Mike - he has a short time to spend down this way visiting family, and he was gracious enough to take a significant chunk of his time and drive three hours round trip in driving rain, plus another two hours here at my place, to afford me the opportunity of hearing these cabs. Mike, it was a pleasure meeting/hanging with you, and I hope you can make it back this way some time. I owe you some crab cakes.
We started off with the 8x5 and it was great to see an example of his finished product - very sharp looking, great fit and finish and attention to detail. I was amazed at how compact this cab was. Very easy schlep, especially with it's shallow depth. Tonally, the 8x5 is very well balanced from top to bottom - very even and
smooth sounding for lack of a better description. I started off showing Mike my sealed 15/8's to give him an idea of where I'm coming from, and he thought I might not like this design as much based on my voicing preferences, but I found it very pleasing, musical, and easy to dial in great tones. Though it may be more idealy suited to more refined tones and styles rather than say, my ham-fisted, pick-wielding rock mangling, I got some really great sounds from it, and the top end sounded beautiful even when we pushed the preamps into heavy overdrive and grit. No buzz or harshness, just very smooth and warm. With the right amp, you can get a very versatile array of tones, including warm, smooth, old-school thump. Very cool. I immediately envisioned another one stacked on top - 16x5's - yeah!
Moving on to the prototype MAS 10 - for my style, or lack thereof, this was my favorite. It's absolutely amazing how much volume this cab milks out of a single 10" speaker. Still a pretty compact cabinet, especially for the volume it produces. This one has several different switches which I believe Mike has already talked about here - they do different things to the mid padding, phase, tweeter on/off, etc. There's a lot of different permutations - bottom line was that they were all great sounding and useful - nothing gimmicky- very musical - not an easy feat. Mike said he had a more rock vibe in mind for this cab, and I can confirm that it delivers in spades. I really like the more mid-forward voicings for aggressive pick playing, and the various padding schemes are great for taking it even more old school sounding. As a proud hater of tweeters past, I can say this one sounded great as well - it's amazing how much much detail it adds even playing passive four strings. Definitely something I could actually use. I can see myself spending hours endlessly playing with all the different variations - so many good sounds to be had - but for the plug and play folks, they all sound great so it's easy find your sound and go - it's nothing to be intimidated by.
Now, for the more general observations on the technology itself, and how it translates to the playing experience. Regarding dispersion, both cabs definitely produce a very room-filing, even sound, even off to the sides. I went from the sound lab into the workshop which is separated by a wall consisting of three layers of fire-core drywall with insulation in between, and indeed the way the sound carries is pretty darn impressive.
But being the high-volume rock hack that I am, the thing that impressed me the most was how the sound carried as you moved farther away from the cab. While it does indeed sound great right up in front of the cab, off to the side, etc., what's cool is that the cab is noticeably louder when you get around ~ eight to ten feet out in front of it. Moving farther out yet, the low end doesn't drop off - it (along with the mids and highs) remains full, and the tone stays balanced across the spectrum. How'd they do that??
Even more generally speaking, these cabs sound and respond like sealed cabs, but with the low frequency extension of a ported design. They have a tight, thick, meaty low end that stays coherent even when I goosed the bass control on the preamp with the deep engaged. Add in a little treble to balance, and the tone is still musical and useful. I
need to build a tube head to play with these!
Another nod to the technology, which I'm glad Mike pointed out - we set the MAS 10 cab on top of my stool, about two feet off the ground - no loss in the low end, and the subtle tone shift was probably more from having the mids closer to ear level. I've never heard a cab that doesn't get neutered, at least to some degree, when you do this - but this one doesn't.
We purposely bypassed the 35 Hz filter on my QSC to see how they would behave with my preamps, which I've spent a lot of time dialing in, and we were able to get huge, huge sounds with no farting, even at extreme settings with the bass goosed. Very cool. No HPF needed. We were running one side of the QSC into both cabs, so the 8x5 was being fed around 1200 watts, and the MAS 10 was in the 700 range. I thought they handled it extremely well, and the volume they produce is absolutely impressive. We ran them up to their limits, and I can't imagine you would be allowed the play that loud in most gig situations. I freely admit to playing way too loud - I warned Mike before I initially fired up, and I think I got his attention when I hit the first note when we were starting out with my cabs

, so I of course gravitate to something like his MAS 210 or the massive 15 cab he mentioned - most definitely overkill, but thats right up my alley! But either of these cabs with a quality micro would likely fit the bill for most folks.
I'm thankful for getting to experience all the genius of Mike, Duke, and the Big E guys, and it was a positive reminder of all the cool stuff going on with these folks and the other talented designers that have and/or continue to frequent this place. In the end, which ever designs you end up with, as other folks have said, it's a great time to be a bass player!