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SEAS Thor Speaker / NCMS Rhythm 9500 Unlimited

I've read about these new speakers from SEAS designed by Dr.Joseph D'Appolito and have quite an interest in them. The most recent issue of Audio Express talks about them at length and they look to be a really nice design for those of us who like a well built transmission line speaker. If you haven't seen them yet got to http://www.madisound.com and go to "kits" and they're at the bottom.

My question is,"Has anyone heard these speakers or tried to build them yet?" I'm curious for some input if you have heard them. I don't like the fact that Madisound has opted to delete the base plinth that was part of the original design so I will most likely have to build the cabinets myself. The article has a mini review but I'm looking for more reactions to these speakers.

The other kit that I've been looking at is the North Creek Music Systems / Rhythm 9500 Unlimited. Again, if you have not seen it check out, http://www.northcreekmusic.com/NorthCreekKits.html
Costwise the NCMS Rhythm 9500 Unlimited is qiute a bit more expensive but comes from some great sound guru's. Any thoughts on these would be appreciated.

Thanks,
128x128bryhifi
tweekerman
473 posts
 
Keith , Very nice post! Is it true the Thor MTM is best with ss amp? What db changes take place in the 2 W17's? Alot less sensitivity correct? Thus ss amps can supply bigger ohm load?
bryhifi's avatar
bryhifi OP
91 posts
 
Just returned from Jamaica then Hilton Head,,,,,3 weeks without access to the net!

I still have not made up my mind yet on which one, but the itch is getting intense! I've got to do something soon!!!!

Trelja, I think we need to get in touch again. As always your points carry much validity and your interest in speakers sparks my old time passion for them. If you remember, we live rather close to each other. (Discussed Community Audio) Your preference for Vifa is a solid one. I used them to a great degree back in the late 80's to early 90's for custom built jobs and they always won the price/performance contest.

Keith, thanks for the direct comparison between the 2 kits! That is exactly the kind of thing I was looking for. Question??? Since you built your Thors last year which cabinet plan did you end up using? There was discussion of the original plans at SEAS website being preliminary blue prints and ended up not being what J.D. finished with.

Tweekerman, Thank you for all your input on this topic too. I love your enthusiasm for the hobby! Keep me posted if you hear anything else at M.A.D. please. I've got a ton of catching up to do after being away for 3 weeks and know I will miss something.

Best Regards,
tweekerman
473 posts
 
The big thing going on at Madisound for me at least is the 3 threads on midranges. Seems the Zellaton by Goerlich, Germany is voted "best" by one Greve, a DIYer who says he's got ATC's , Seas, Accuton's and a bunch other midranges on his work table. But seems to be a problem for me, the Zell's are 4 ohms, i've got a 8 ohm kit going. There's always a catch. The Eton's got big votes as well. But their sensitivity is low, like 85db. So i don't think that'll work with my Seas + Ribbon. BTW Seas has a new W26 beauty out in June. I'm trying to see if a 2 way may work, with a ribbon that goes to 1K hz and the W26 goes upto 1Khz. Will this be doable? Or give me your pick with this driver in a 2 or 3 way.
trelja
3,215 posts
 
Bryhifi, your last post jogged my memory. It's good to hear from you!

From what I remember, you lived in the Collegeville area? If so, we are about 15 - 20 minutes away from each other. I live between Conshocken and Manyunk, in Whitemarsh Township.

Are you going to the NYC Stereophile HiFi Show? If not, maybe we can get in touch via a different means.
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