I've got 6 Seas excel W15 & 3 Millennium tweets.... Now what???

[HYPERTUNE]

I purchased these along with components required to build 3 "Froys",(years ago) and so far have built two for stereo use. To be honest, I'm not overly impressed with them and after doing a little research it seems that the crossovers may leave a little to be desired.

There seem to be quite a few threads regarding various MTM's with metal cone drivers here, and I hope to get some advice on how to get the most from these drivers....

I plan to implement them with a subwoofer and was thinking of doing an MTM in a sealed box with a volume around 11 litres.

I have a CNC machining centre and am tempted to do an enclosure like these:

http://www.htguide.com/forum/showthread.php4?t=28398

ANY input would be appreciated.......

[subynube]

I know the Seas Thor does not have exactly the same drivers, but I believe the tweeters are the same. Read the following thread on this forum on the redesign on the seas thor to make it sound MUCH better. Not sure, but maybe you can do something with this?

http://www.htguide.com/forum/showthread.php4?t=26754

[cjd]

Where're you located? If you're in my area, or willing to ship, I'd be happy to work something up (box can be "temporary" as long as the baffle layout and treatment is final) - these'd be a nifty design to put together as it's a step up from my already popular MTM using two of the Dayton RS150S-8 and your choice of tweeters (Seas 27T*FC or Dayton RS28A)

That said, a quick glance over the numbers suggests the crossover work I've done for those would come awfully close to just working.

C

[jkrutke]

What's the crossover frequency on those Froys? I've found that 1900 works pretty well in an MT design with the W15. In an MTM, a few hundred Hz lower helps for the typical MTM power response issues.

The W15 is one of my favorite drivers (aside from the wandering breakup node over the years) and I'm working on an MTM right now. I'm pretty much waiting for the DXT waveguide tweeter to become available for this design.

[Davey]

2.2khz.

All the info on the Froy kit is here:

http://www.seas.no/index.php?option=com_content&task=view&id=25&Itemid=39

Davey.

[HYPERTUNE]

Where're you located? If you're in my area, or willing to ship, I'd be happy to work something up (box can be "temporary" as long as the baffle layout and treatment is final) - these'd be a nifty design to put together as it's a step up from my already popular MTM using two of the Dayton RS150S-8 and your choice of tweeters (Seas 27T*FC or Dayton RS28A)

That said, a quick glance over the numbers suggests the crossover work I've done for those would come awfully close to just working.

C

Unfortunately I'm in Australia, otherwise I'd definately take you up on that offer
Using your crossover is actually one of the things I was thinking. Do you think it would be a good place to start? Here is the schematic of what I am using now:

http://www.seas.no/images/stories/diykits/pdfdataheet/filter_froy.pdf

And a not so flattering review by Joe D and Dennis Colin, in which they mention possible deficiencies in the crossover:

http://www.audioxpress.com/reviews/media/403colin-dapp2204.pdf

[HYPERTUNE]

What's the crossover frequency on those Froys? I've found that 1900 works pretty well in an MT design with the W15. In an MTM, a few hundred Hz lower helps for the typical MTM power response issues.

The W15 is one of my favorite drivers (aside from the wandering breakup node over the years) and I'm working on an MTM right now. I'm pretty much waiting for the DXT waveguide tweeter to become available for this design.

Yes as stated above, 2.2K.

So you are working on an MTM using the W15's? If so, I really think you need to design them around the Millenniums!!! :T (purely for my benefit)

Oh, I guess now is as good a time as any to thank you for your contribution to DIY. I have spent quite a bit of time reading your site over the years.