SEOS Franken-steen - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 21 Old 10-03-2014, 07:57 PM - Thread Starter
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SEOS Franken-steen

Long time lurker, but this is my first post! I am pretty green, so be patient!

I made a mistake a few moons ago and purchased a pair of Vandersteen model 2c speakers without listening to them. Upon bringing them home I found several drivers were replaced by crap and so I ended up spending more money finding oem or as close to as I could drivers for them. I never was really satisfied with them. The cabinets are actually kind of cool so my idea was to build them into a fusion 10 pure kit. I made some rudimentary models of my idea. I want to flip the cabinet backwards and have the waveguide and cd visible. The cabinet is about one cubic foot, I would have to make a baffle (Or maybe Erich can have one made or has something in stock that might work. I know he is super busy though) and something to plug the 8 inch hole on the other side. Also the baffle would be 14.5 inches instead of 12.5, which I guess would cause a slight bump in the low midrange, is that right? This may be a totally stupid idea and I am sure a few will say I should just buy a flatpack, but it's hard for me to look at those enclosures and not think about what I could turn them into. Thoughts? Anybody in Los Angeles willing to lend a hand? And maybe before I take the plunge is there anybody out there willing to let me have a listen to a SEOS design?

Cheers,
Ian

ps: will be using these for movies and music in a 2.1 system with two Dayton RS subs.
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post #2 of 21 Old 10-04-2014, 02:46 AM
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"Long time lurker, but this is my first post!"


bravo!


design looks nice and should perform just fine.

Listen. It's All Good.
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post #3 of 21 Old 10-04-2014, 05:03 AM
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Nice project. I use to sell Vandersteen, i would concider them a polite speaker, great for music, no sub really needed if it were just for music at lowish levels. Spendor, Rogers, Spica, all names for the history books i guess

KG

Looks like the new speaker will do both well, especially with one or two RS subs. I had a pair of the RS12" subs and they were sweet with music, very little needed to satisfy.....

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post #4 of 21 Old 10-04-2014, 09:06 AM
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Cool idea. When I researched changing baffle dimensions I read that staying within 10% is best but you should be fine. Especially if LDT02 gives you the thumbs up!

Instead of modifying the existing baffle what about modifying the baffle that comes with the fusions? I would ask Erich to send the baffle without the round overs and then you can glue 1" strips of 3/4" mdf to each side. Then glue a panel to the bottom and then round over all the edges. You could even make it a double baffle if you are concerned about the strength of the glued up baffel. Might be easier than filling in 8" holes and cutting port holes. You would just need a cheap laminate router and round over bit and a table saw to make some straight cuts.

I would help you do it but I'm out here on the east coast.
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post #5 of 21 Old 10-04-2014, 01:07 PM - Thread Starter
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Thanks for the vote of confidence guys! I will just go ahead and start the transformation.

Boxozaxu, that is a great idea. That way I can use Erich's cnc cutout for the SEOS, which would look like a pain in the butt to cut out for a flush mount by hand. It also allows me to play around with using something different for the edges, give it a little flair. My baffle will be about 15% bigger, but If LTD02 says its ok, its ok! I am playing around with REW, though it likes to quit randomly on my Mac. In any case I will try to measure these guys when I am done to see what it does. I do have Audessy on my avr, which if I use it i am guessing it will attempt to flatten it out.

Will changing the placement of the ports on the baffle affect the response at all? I may have to move them down a few inches to avoid interior bracing.

Cheers,
Ian
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post #6 of 21 Old 10-04-2014, 04:40 PM
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Quote:
Originally Posted by Ian Beeuwkes View Post
Thanks for the vote of confidence guys! I will just go ahead and start the transformation.

Boxozaxu, that is a great idea. That way I can use Erich's cnc cutout for the SEOS, which would look like a pain in the butt to cut out for a flush mount by hand. It also allows me to play around with using something different for the edges, give it a little flair. My baffle will be about 15% bigger, but If LTD02 says its ok, its ok! I am playing around with REW, though it likes to quit randomly on my Mac. In any case I will try to measure these guys when I am done to see what it does. I do have Audessy on my avr, which if I use it i am guessing it will attempt to flatten it out.

Will changing the placement of the ports on the baffle affect the response at all? I may have to move them down a few inches to avoid interior bracing.

Cheers,
Ian
No problem moving the ports. You can even put them on the back. That's what chalugadp did in his curved 1099 center build. Looking forward to see how these come out!
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post #7 of 21 Old 11-07-2014, 02:08 PM - Thread Starter
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So I have started the project but I have to have 5 posts to link to pictures. So ignore the the next two posts. I do have to fill some holes, gaps and cracks and I wondered what people recommend for that. Also, with (i think) a slightly different box volume and using a round port on the back means I have to tune the box. I used some online calculators to determine a port size and length for a 70 hz tuning, however I wonder if there is a rule on choosing a tuning frequency?

Home depot's MDF seems to be rather soft and crappy.

cheers!
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post #8 of 21 Old 11-07-2014, 02:08 PM - Thread Starter
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ignore this
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post #9 of 21 Old 11-07-2014, 02:09 PM - Thread Starter
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and this
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post #10 of 21 Old 11-07-2014, 02:09 PM - Thread Starter
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So I have started the project! Here are some pictures:


what the speakers looked like with the cage removed



I trimmed the edges with a flush cut saw.










I screwed the back on to have better access inside. I may end up glueing it all together later.






I haven't screwed the drivers in yet. I also have to brace the top part for the waveguide and fill all the gaps and cracks. I also have to find some nice hardwood (mahogany or similar) for trim on either side of the baffle.
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post #11 of 21 Old 11-07-2014, 02:25 PM
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Not sure if it's my computer, but none of th pictures show up. The pics from post 1 do...?
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post #12 of 21 Old 11-07-2014, 02:26 PM - Thread Starter
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Sorry, pictures seem broken. Lets try this























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post #13 of 21 Old 11-07-2014, 04:22 PM
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Wow looks great. Have you wired it up yet?
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post #14 of 21 Old 11-07-2014, 08:04 PM - Thread Starter
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Thanks, chrapladm, I have not wired it up, I still need to put the crossovers together.


Tux, what frequency do you recommend I tune these to?
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post #15 of 21 Old 11-08-2014, 06:42 AM
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Imo the original speaker is hard on the eyes. Your iteration is looking good and will be pretty nice after finishing. I also like the looks of the stand. If I ever need stands, I may try to replicate
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post #16 of 21 Old 11-08-2014, 11:41 AM - Thread Starter
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Quote:
Originally Posted by gixerking View Post
Imo the original speaker is hard on the eyes. Your iteration is looking good and will be pretty nice after finishing. I also like the looks of the stand. If I ever need stands, I may try to replicate
Thanks!

Originally the Model 2c had a sock that went around the whole speaker hiding everything. i guess it was a cost saving measure so they didn't have to spend a lot of time finishing the speakers. I always found it odd that a company so obsessed with getting rid of diffraction with narrow baffles didn't at least flush-mount the drivers.

Those stands are made by Sound Anchor specifically for the model two and they are beasts. Filled with lead shot, they weigh maybe 40 lbs a piece.
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post #17 of 21 Old 11-08-2014, 02:50 PM
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Kudos!

Great idea and nice execution! They are sweet!

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post #18 of 21 Old 11-09-2014, 03:03 AM
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Those look like you could paint em white, put em in a high end audio shop and slap on a $10,000 tag. Really unique and cool design.
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post #19 of 21 Old 11-09-2014, 04:57 AM
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Absolutely gorgeous! You have very right to be proud of your work.

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post #20 of 21 Old 11-13-2014, 11:29 AM - Thread Starter
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Quote:
Originally Posted by sandydankness View Post
Those look like you could paint em white, put em in a high end audio shop and slap on a $10,000 tag. Really unique and cool design.
Well, 10,000 if I rub a little snake oil on them. Most of that money would go to Erich and Tux, since it is a Fusion 10 pure at heart. Just don't look too closely at them or you'll see all the mistakes I made. I think the drivers are 1/8th inch off center to the left, and that's just the beginning! But thanks for all the kind words, guys.

I added some Sapele to the edges:







I still haven't wired up the crossovers, and I also need to add the port. Tux or Erich, if you happen to read this, what was the Fusion 10 pure cabinet tuned to? I don't think I can use the ports that came with it.

Also, should I put the port on the front or back? This is an aesthetic question, not a technical one.
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post #21 of 21 Old 11-14-2014, 09:08 AM
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Nice work! DIY should always be a learning adventure.
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