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Old 15th December 2008, 07:21 PM   #921
gedlee is offline gedlee  United States
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Quote:
Originally posted by sbe4kdr
Yes I've also noticed some glue oozing out between the the inner and outer baffle. I use polyurethane construction glue.

Also the holes for the woofer are to small. Some extra 'routering' was needed.
Perhaps also worth mentioning in the manual is the screws from the side panels to the front baffle are a bit to long.

I'm going to try the smaller cap since the Nathans are brighter then I'm used too.
I know the early screws were too long, this has been changed.

The glue squishing out from between the boards is also expected, you can just cut it off or sand it.

But the hole for the woofer being wrong - nobody else has said that. Was it the inner hole or the outer one? Since you are overseas did you buy your own drivers? Did you use the identical B&C?
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Old 15th December 2008, 07:27 PM   #922
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Originally posted by gedlee
Right now the Summa15 is made in a composite plastic cabinet as it has been from the begining. Thats the only way I can do that one right now and that approach is not viable for a kit. There ARE a lot of advantages to the plastic cabinet, but cost is not one of them. So the other two models opted for a more reasonable cabinet design with a slightly lower performance. But I'd say that the performance of the Abbey is about 90% of the Summa at less than 1/2 the cost. I believe that's a pretty good trade-off . But if your want the Stadivarius then its the Summa.

It would not be possible to make the cabinets one's self? I have a complete woodworking shop and could probably make do I would think.....

Again, thanks,
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Old 15th December 2008, 08:04 PM   #923
gedlee is offline gedlee  United States
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How would you make the waveguide/baffle which is all one piece? It could be done, but wow, what a lot of work. Initially I had the baffle made in glass and made the rear part myself in wood. But the large radius corners took forever to do and so I had the rear made in glass too. The cost of the fiberglass parts is far less than the time and materials for doing it in wood.

Several people have tried to make the Summa enclosure in wood, but none have suceeded to my knowledge. To do the baffle right it has to be CNC'd and unless you have one of those and are very good at using it the cost of a single baffle goes up to about $1500. In the end everybody just gives up because the costs are too high.

I am willing to help you do one however you want, but no matter how you go, it is expensive. If you feel very competent then I can get you the fiberglass parts. But thats not like doing a wood project.
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Old 15th December 2008, 08:10 PM   #924
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What is the radius on the enclosures currently supplied with the kits?

-Tony
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Old 15th December 2008, 08:19 PM   #925
gedlee is offline gedlee  United States
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1", the Summa15s are 2". There are no 2" router bits. Its the roundovers that led me to MDF. A smaller one makes MDF viable. 2" and its not worth the trouble - just do it in glass.

I did see where you can buy 2" MDF roundovers pre cut. That is very interesting. But the bottom line is there just isn't a lot of interest in the bigger Summa - not with the cost increases that come with this size.
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Old 15th December 2008, 08:22 PM   #926
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Quote:
Originally posted by gedlee
How would you make the waveguide/baffle which is all one piece?
I am willing to help you do one however you want, but no matter how you go, it is expensive. If you feel very competent then I can get you the fiberglass parts. But thats not like doing a wood project.

How thick is the waveguide/baffle? Do you cast this currently (using a mold) out of fiberglass?

I might have access to a cnc machine. would you machine it out of say, aluminum?

What about machining the waveguide out of aluminum and setting it a concrete baffle? Or maybe make the whole thing out of concrete using an aluminum mold....???

Anyway, the thickness is a major determinate I suppose....

Thanks again,
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Old 15th December 2008, 09:05 PM   #927
gedlee is offline gedlee  United States
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The current baffle is molded in a fiberglass skin then backfilled with dense polyurethane foam to 2" thickness throughout and the waveguide about 8" thickness.

Molds are only cost effective if you are going to make many parts. To cut the baffle or a mold in aluminum would easily cost $5000.

Trust me here, I have looked into all of this and I do what is the most reasonable given the volume.

You would end up spending more to copy a pair of Summas than they would cost from me. So unless you LOVE to do things yourself that is not a good choice.

I could sell you a baffle in fiberglass with polyurethane filling for about $800. Then you could make the rear enclosure yourself, just like I did in the begining. A pair of baffles, drivers and crossover parts would be about $3000. But then you'd still have to make and attach the rear enclosure, finish and add the back panel. About 100 hours of work (best case).
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Old 15th December 2008, 09:59 PM   #928
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I will be in the Detroit area in Feb/March visiting relatives.... Perhaps, if you have time, I might have a look (and hopefully a listen!) when I am in the area...I would be able to make a more informed decision at that point on which way to proceed...

Thanks again for the information....
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Old 15th December 2008, 11:30 PM   #929
gedlee is offline gedlee  United States
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Sure you can stop by. I just ask people to post their impressions.
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Old 16th December 2008, 12:47 AM   #930
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Thank you very much....Looking to be the middle of March....Will touch base with you as the time draws closer and I would be happy to post my impressions...

Thank you...
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