The Official Magnepan Owners Thread - Page 135 - AVS | Home Theater Discussions And Reviews
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Originally Posted by 12B4A View Post
I think you would be better off with a larger panel solution than augmenting with DWMs. It's a simpler process with speaker placement as the DWMs add another source of midbass that complicates room interaction. Speaking as someone with a SMMG/2DWM system, I can tell you that if I were to do it all over I would have gone with larger panels instead. It's just that at the time I bought the system, the 1.7 home trial was not available nor was the .7 released. That's not to say I'm not satisfied with my setup now but in the end I know it would have been less placement manipulation without having the DWMs in the mix.
I don't get the logic of adding small "bass" panels to small Maggies at all. Even full-size Mag's are bass deficient---going large seems what is required, not small. Fanatics have employed the 3-screen Tympani's as woofers for full range Maggies for years, but that takes a pretty big room. If you want to be a purist and stay dipolar, GR Research offers 8" and 12" Open Baffle woofers and plans for both a W-Frame and H-Frame to install a pair in, the two woofers facing 180 degrees apart, one towards you and one away. They are wired in opposing polarity, creating a dipole dynamic sub that works great with panel speakers. The GR woofers are made to be hooked up to the Rythmik Servo-Feedback plate amp (A370) which has a shelving circuit to compensate for the low-frequency cancellation that occurs in an OB design; when the front and rear low-frequency wave wrap around the Frame and meet at it's sides, their opposite polarity cancel each other, the cancellation increasing as frequency descends. The Rythmik Shelving Circuit adds a complimentary opposing signal to counteract the falling frequency response of an OB sub. If you can't have large Maggie bass panels but want dipole bass, the GR Research/Rythmik OB sub is the way to go.
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post #4022 of 4022 Unread Today, 07:15 AM
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The logic is that more surface radiating area gives deeper bass output. This is true to some degree though the implementation actually results in the DWM and main panels sharing lower bass output but handing off upper sub-bass output to the DWM which goes just a little lower than a MMG. This allowed Magnepan to directly sell and ship to customers (who were out of range of a dealer) a fully planar system that could go lower than the MMGs. Now that the 1.7i has a direct shipping path of ownership (and with some dealers willing to drop-ship other models), the super-MMG system seems to fill a smaller niche.

As for using a DWM with the larger panels, there is something to consider: the newer of the larger models have gone to all quasi-ribbon single-ended magnet panel setups. The DWMs, on the other hand, still use the push-pull magnets & wire panel setup. I lack experience with the full QR panels so ¯\_(ツ)_/¯ if I can say if that makes a meaningful difference. Given the DWMs crossover divides bass power between panels more so than bins power by frequency to each panel, more phase interaction issues are encountered in room setup potentially muddling any benefit to the PP magnet tech.

My cynical take on the whole DWM concept is that they still wanted to utilize their PP magnet panel machines and tooling when the majority of their speaker lineup is shifting towards full SE magnet QR panels.

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