Posted by Chris [ 71.122.32.155 ] on June 12, 2007 at 17:04:50:
In Reply to: Re: Here is a Link to the driver posted by Chris on June 12, 2007 at 16:12:32:
Here is a picture of them if anyone wants to see the physical configuration.
The two 10 inch woofers have different roll off points, done by using different magnets on the woofers.
The lower 10" woofer is called a "mega woofer" and rolls off sooner, the top woofer is called a "midwoofer" and "meets" the ribbon, at least it is supposed to ?
I did not like this arrangement, and was getting a huge hole in the 150 to 600 hz region, imparting a thin, etched, super detailed quality sounding anything but like music.
So, I got another pair of "midwoofers", and used them.
This sounds a little better, but it still ain't right.
Mathmetically, does anyone know HOW far I can take the two woofers up in frequency before I get into severe interference patterns ?
The ribbons use a first order high pass, and there is only an inductor on the woofer.
My gut instinct is that for these speakers to work at all the woofers need to play higher up, and so do the ribbons.
Jose said they don't have any output until 500 hz, and others have said the same to me.
Then why cross em in at 280 hz if there is no output there ?
So guys, my question is "How far up do you think I can safely take the woofers with a 24 DB crossover before severe interference patterns hurt me ?
I cam measure the vertical spacing ?
I can't help but thinking that if the midrange ribbons don't like to play low, that some of what I hear is the VMPS crossover is trying to force the ribbons to do what they do not want to do.
That is, play low.
Maybe they will not blow up, but they might not sound good either being forced to play what they do not like ?
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