MMGs

I have the 1.7s with a pair of Rel T5s and find that they blend very well.  I certainly don't hear the subs as being separate.  I find the 1.7 to be sensitive to vertical alignment.  I put a couple of 1" block under the rear legs to tilt the panel slightly forward at the top and it makes a very noticeable improvement.

Department of 2 Cents.

I just replaced MMG’s with .7’s and am thrilled, stoked, thankful, and pretty much blown away, etc. My dedicated listening room is small. 11’ wide x 13’ long with most of the rear wall open to the LR. I expected an improvement but not of this magnitude. Placement took maybe a half-hour of experimentation. Speakers are positioned approximately 3’ out from front wall, about 18" from side walls, and toed-in a few degrees. Tweeters are on the outside.

Electronics: a world-class tube preamp and, temporarily, an NAD C272 amp. Cables? Inexpensive stranded copper. With all respect, I think that a lot of "angst" and negative comments one reads in audio forums regarding Magnepans is a result of operator error, hearsay, and hyperbole.

I'm fortunate enough to have a Maggie retailer within walking distance of my house. I was able to compare the .7's and the 1.7's one afternoon and I preferred the .7's over the 1.7's. 

While the 1.7's definitely provided more low end response, my ears found the .7's to be more articulate (?) overall. With a suitable sub - not the Maggie bass panel - I believe you'd have everything the 1.7's add without spending more than the cost of 1.7's themselves. 

I think, new, the .7's are about $1500?  The 1.7's $2,000?  The math works, and to my ears so does the sonics. PLUS, the .7's are considerably smaller. 

Voila. 

ps, how'd you characterize the differences between the MMG and the .7? Just curious.  

I don't know if I would venture into 3.3 territory, Maggies that old are bound to have delamination issues.  Just as an FYI - John does not recommend any .7 Maggies, at least not if the long term goal is to have them modded.  He explains in detail on his website why.  I am not going to agree or disagree, I have not listen to .7 or 1.7. 

randy-11 - MDF will absorb a little bit of vibration, but nowhere near enough.  I used to built sub boxes for car audio for years out of various types of MDF, so I am familiar with the material.  Take a stock Maggie, say a 12, turn it up to fairly loud level, and feel the frame.  You'll feel very little vibration, it will feel disproportional to the volume.  Try the same with a gunned Maggie, and you'll feel quite a bit more vibration on the wooden frame.  Natural wood dissipates vibrations far better.