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In Reply to: RE: From Hell (via a pair of old MMGs + add-on 10" woofers) posted by JBen on May 14, 2015 at 23:32:48
I had good organ bass results with the wall -loaded (Limage) Tympani and bracing to the wall with my 2kw/ch amp. It does not do belly shaking quite as explosively as a pair of long throw 13" woofers but it is most definitely felt as well as heard. And shakes things off the shelves. The extension is incredible as you hear the pedal notes clearly Even the 16hz is loud and clear. And there is no integration problem,
Vandy 2C sub conversion project is still on hold.
Follow Ups:
LOL, Satie, I was also remembering you this past weekend as I played some low-bass music. I kept amusingly thinking about you saying "not enough...never enough!" ...even as things shook off the walls in my room.
The lowest bass my modded MMGs can muster by themselves is 32Hz (like at -10db under best conditions). Barely a whisper, though musically intact. To hear it while at normal overall listening levels, I have to have the A/C and the fridge off. In addition, its gotta be very cool outside so that my neighbors turn their A/C's off also. OTOH, at 40Hz and up, things are lively, even impactful.
With the new woofers on, that handshaking at 40Hz took some attention but it was well worth it in this room. The woofers now reach under 20hz with adequate composure and definition. Seamless delivery is amazing. For all intents and purposes, it is just the MMG's personality simply reaching lower.
Your mention of those long throw 13" woofers reminds me of something that may be critically helpful here, if only by accident. By choosing low-profile woofers -- with their inherent SHORT throw -- I may have inadvertently achieved a better "driver mating". (Yet, all I was initially pursuing with these thin woofers was to have shallow boxes, dumb me!) Does this make sense?
Outside of cost I don't think the low excursion woofers are an advantage. the bigger magnets required for the long throws are better for everything. The only downside might be in the surround suspension. Old style folded fabric surround (think ye ole JBLs) tends to provide "faster" bass that may mesh better with a planar.
The main thing you got in this setup to have the positive integration is the sealed cabinet for the bass drivers. The rest is XO/placement alignment.
Satie, yup, that is the prevalent view, which had always been my own. In fact, partly because of the smaller magnets, I had serious misgivings at first.
However, I have recently begun to scratch my head bloody on this. Anyway, this is by no means the only potential contributor, if it is at all such a thing.
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