Passive sub for Magnepan 3.6r?


Intrigued by the fanatical praise for the Magnepan line, my buddies and I finally got the chance to audition same at length. The 1.6s were fairly engaging, though a bit bright to my ears, and wholly lacking in low end slam--overall there's a number of conventional dynamic speakers I'd choose for the same $$. The 3.6rs, however, truly are as awesome as their cult proclaims--they reproduce drums and vocals as well as anything I've heard and are incredibly transparent. We did an A/B comparison of the Maggies to comparably or higher-prices B&W Nautilus and Thiel floorstanders, and it was absolutely no contest--next to the Maggies, the others sounded veiled and boomy.
All that said, and with due respect to those that enjoy the 3.6rs w/o a sub, we all felt that the 3.6rs lacked bottom end impact and were, in effect, 80% of a great speaker. We then added a REL sub (as is often recommended), but still struggled with the integration--no matter how we adjusted the sub, the combo still sounded like two separate speakers, not an integrated whole.
So my question is, assuming I take the plunge, would the Maggies be better served by pairing with a passive sub? My concept, as yet untested, is that by using the same amp to power both the sub and the Maggies, I might get a less distorted, more seamless sound. While I'm sure this topic has been addressed somewhere, your informed opinions would be most appreciated.
loomisjohnson

Showing 4 responses by loomisjohnson

ultimately, i decided to pass on the maggies and stick with my revel f32s. notwithstanding the maggies' fantastic qualities, my ears still demanded a sub, and i just couldn't deal with the psychic and financial investment in upgrading power amps, finding the right subs and explaining to my wife that the giant monoliths in the living room were actually new air filters or something.
thanks for the feedback. i auditioned the maggies in optimal conditions--acoustically treated room, speakers seemingly well placed at least five feet from the wall, driven by a big old boulder amp (certainly more than 500w + @4ohms)-- so i don't think the set up or associated gear was the issue. we also crossed over the REL at 40 (consistent with what macdadtexas does), but all of us still heard the disconnect. i'm sure audiokinesis's analysis of the room interaction is correct--he seems very knowledgeable--but i still wonder whether using one amp (rather than an amp to drive the maggies and the sub's amp)might be a more cost-effective solution; hence my initial question about using a passive sub.
good thoughts, johnnyb--i've generally assumed that subs aren't so placement critical nad didn't really think of the spped of the panels relative to the sub (esp. since everyone claims how musical the REL is). i'll hunt around to see how users like the maggie/ml sub combo or passive woofer.
again, many thanks.
Thanks to all for unusually good and thoughtful feedback.
After digesting it all, my continuing quandry is whether the Maggies are truly worth the commitment--upgrading power amps, adding one or perhaps several subs, tweaking the room, etc.--when some more traditional full-range speakers are more of a plug-and-play (and certainly cheaper) proposition. As a sick Agon freak, I know much of the fun is in the setup, but I have to mull this over.
Again, many thanks--lots of smart people weighing in.