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buzzforb 29th December 2010 10:41 AM

I have been reading threads about your Tysen speaker and came across a post that suggested you were working on an SDX7/Alpair 7 combo. Did you ever finish that speaker as I am very interested in using an ALpair7 or 10.2 in this type of enclosure as my first speaker. Side note: Not knowing much about speakers, why have you chosen side firing woofers? THanks.

planet10 31st December 2010 06:41 AM

I still haven't finished designing it yet. I have a number of preliminary drawings, but am not yet satisfied with what i have come up with so far.


buzzforb 31st December 2010 09:54 AM

why the side firing woofer? Is it because it is crossed low and down low the woofer is firing into 4pi space and directivity is not an issue? Does adding a woofer and freeing up the Alpair from going low improve the response/sound of the Alpair because of reduced excursion? forgive me if these are not the right terms? I have followed many of your threads and need help as i am going to purchase one of the two Alpairs mentioned now that they are available.

planet10 31st December 2010 10:38 PM

At the frequencies the woofers are used in, they are omnidirectional. Side firing means i can get them closer to the mid-tweeters, creating, in essence, a large co-axial loudspeaker.

Yes, relieving A7(s) from low bass improves their mid-top performance.


buzzforb 1st January 2011 12:25 AM

Is the chamber of the woofer seperated from thr FR? If not, wont it affect the FR from inside the cabinet. Based on a 16' X 16' room, should I go with 10.2 or 7?

planet10 1st January 2011 01:41 AM

Yes. Woofers have there own (common enclosure). I'd like to get the A7(s) into their own little TLs, that is proving tricky.


buzzforb 1st January 2011 05:07 PM

If sealed and radiating into 4pi space, what is the need for attempted coaxial location, better phase coherence? Also, I read an article from Olsher saying that he did not like the idea of using drivers with different cone material. What is your opinion. I found this 8" Audax woofer with more efficient SPL response, Would it work as well as SDX7. Seems to have more even response curve as well.

planet10 1st January 2011 08:23 PM

The closer together all the sources, the better.

There probably is something to the common cone material idea, but, once tweeked, the SDX7 works really well.

I am sure that there are a lot of good mid-woofers that can serve the same role as the SDX7. I have some Silver Flute here as well to play with -- and the Mark Audio #6/EL166 works well in another project.


buzzforb 1st January 2011 08:33 PM

Thank you for the info and the time. One last question, between the 7 and 10.2 in this configuration, which will be able to play a greater range of music. Which would you choose from your experience. I know you havenmt played with the 10.2 much, but you have as good of an idea of its ability as anybody. I guess that was more than one question! :D

planet10 2nd January 2011 09:41 PM

Actually i have played with A10.2 (we got a hand built set of production prototypes for diyFEST), but not as extensively as A7. ATM, with bass support, i'd be choosing A7.


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