Magnepan announces the 20.7

Despite the hyperventilating expect an incremental improvement, as I predicted with the 1.7 and 3.7.

Doug, I'm trying to understand why people are having such different reactions to their auditions of the .7 series. I wonder how much of this comes down to semantics. I'm asking myself "At what point does an incremental improvement cross the threshold and become something more?" Can you provide more specifics about your audition of these speakers?
I auditioned 3.6's with some pretty decent Electrocompaniet equipment. Yes, they sounded very good. I was struck by how similar they sounded to my 1.6's. The 3.6's had more at the frequency extremes, and the presence of the ribbon tweeter certainly added much over the 1.6's. These were demo's that were well broken in, driven by a decent front end, and in my judgment were worth considering as an upgrade given the modest cost of swapping my used 1.6's for demo 3.6's. I would have called the 3.6's an incremental improvement over my 1.6's.
My audition of the 3.7's came 4 weeks later, in a different store, and my reaction was very different. I won't recite all the improvements, it would just be a repeat of what you have read in the reviews. I placed an order the next day and have had them in my home for 3 weeks now. The 3.7's in my home perform consistent with my expectations based on my audition, and I remain extremely pleased. I had no problem justifying a 5K investment on the 3.7's vs a 2K investment on the 3.6's. For me that does not constitute an incremental improvement but something much more. For me, the 3.7's were more than an incremental improvement over the 3.6's and my 1.6's.

Part of the problem I think is that "incremental" is a relative term. What's huge to one person is small to another. But I'd say in the case of the 3.7's, the typical reaction seems to be more in keeping with yours -- the improvement is more than incremental. But I've heard someone else say as Doug did that he thought it was in incremental change.

One thing that's true, the .7's have major changes -- quasi-ribbon rather than wires, single-pole crossovers, improved power response, better midbass. So technically, there's a much bigger difference between a 3.7 and a 3.6 than a 3.6 and a 3.5. Magnepan has made it clear that they weren't going for an incremental improvement on the 20.7 -- Wendell Diller was quoted as saying they wouldn't release it until they could make a significant improvement.

But even if the difference is bigger than it is for the typical new model, there's still going to be an element of subjectivity in the description. It's entirely possible that two people will hear the same exact sonic changes, and one person will say "nice but incremental," while another will say it's the best new thing since sliced bread.

Ultimately, I think the only thing we can do is listen ourselves, as you did.

Brownsfan, You are right that semantics plays a large part in the matter. For me an incremental change happens when a speaker retains its basic character and is improved. I believe that is the case with the 1.7 and 3.7, and I believe it will be the case with the 20.7 as well.

I owned the 1.6QR for years and can't recall all the times aside from shows that I've heard the 3.6 in dealerships and at shows. My impression at the shows where these speakers were revealed was that they were not vastly different from their predecessors. I agree that the bulk of the improvement is in coherence.

When I reviewed the Eminent Technology LFT-8A and did the conversion of the speakers to the LFT-8B I was shocked at how one change, replacing the tweeter with an upgrade, made the entire speaker sound different top to bottom. Keeping that in mind I felt I heard similar improvements from the 1.7 and 3.7 which could be caused by incremental improvement.

One reason I would suggest that this is incremental improvement is that the bass has not been improved appreciably in terms of extension. The design of the speaker has always dictated a shallow low end and this has not been addressed; I believe technologically it cannot be ameliorated or else Magnepan would have done so. If that had been altered appreciably then I would be much more inclined to call it a sweeping change.

To be fair, I enthused about the change from the Legacy Audio Focus HD to the Focus SE and felt it was a profound enough difference to merit the cost of the upgrade. The driver set was the same but tolerances matched to +/- .25dB, and the cabinet was new as well. The tweeter received a silver wiring upgrade and Solen caps were used. Finally, the M/T drivers were set higher in the cabinet than with the HD version. The low bass response of the SE version was improved by 2dB.

It is possible that if I had the 3.6 and 3.7 or the 20.1 and 20.7 in my room I would conclude likewise.

They could probably increase bass extension -- the Apogees, for example, had more extended bass than Magnepan speakers of the same size. But AFAIK, doing so would mean increasing plate separation and magnet strength so the fundamental resonance could be moved lower without diminishing efficiency, and that would increase the cost of the speakers. I assume that they've decided that the cutoff frequencies they use, and the tradeoff between baffle size and plate separation + field strength, offer the best bang for the buck.