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Old 05-04-07, 05:22 PM   #11 (Link)
aceinc
Senior Shackster
Alias: Paul
Loc: SW Ranches, Fl
User: #3355
Since: Oct 2006
Posts: 186
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Re: Xover design...


Brian:

I finally built a center channel, totally different from what we had discussed. My original question in this thread is still important; Do you design, or help with the design of a xovers? Either for money, or out of the kindness of your heart.

I will be taking some measurements in a decidedly non anechoic room (I'll try to deaden things as much as possible with blankets and towels and the like) using REW for all the drivers individually in the cabinet. But I do not have anything that can give me impedance curves or anything like that. If you have any ideas on software or hardware that will help

When I get home I'll snap a few pictures so you can see what I'm dealing with.

The specs as I know them;

Cabinet is ~32" wide by 8-1/2" high.

There are 12 drivers in the cabinet, 4 - 5" 8ohm woofers, 4 - 3" 8ohm midranges and 4 - 5/8" 6ohm tweeters. All sections of drivers are connect in series/parallel, to hopefully yield their original impedance, as a section.

The 4 tweeters are stacked closely in the center, flanked closely by the mids stacked in pairs, and the woofers are outboard of that.

The mids are extended range, and should be capable of a fairly low xover point, (Hopefully this will limit comb filtering and mid range smear.)the tweeters need to be crossed over above 3,500hz.

The woofers are partitioned off from the mids/tweeters, and ported. According to winisd, I can expect < 50hz f3.

I am hoping for the improbable, a xover with a low parts count and good sound.

All input is welcome.

Paul


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