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Multi-Way Conventional loudspeakers with crossovers

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Old 15th November 2008, 10:51 PM   #91
Pano is offline Pano  United States
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Just to bump this thread.

I built a pair of these for myself yesterday, see pics below.

Not using the same tweeter, I've got the old ScanSpeak 3806 installed. The monster tweeter - alas no longer made.

Sounds great with just a 13.5mH coil on the woofer and 5uF + 5.5R on the tweeter. Crossover point is about 1100Hz, acoustic.

As the cutout for the SS3806 is so large, I plan to try a few small cone drivers in its place. E.G., Fostex, TB, Aurasound, etc. Will probably cross them 2nd order HP at about 1100Hz.

My hope is to find a nice, big, open back "tweeter" to mate with the Peerless woofer. That might encourage a few more people to build this fun speaker.

Stay tuned.
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Old 15th November 2008, 10:52 PM   #92
Pano is offline Pano  United States
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back of the beast
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Old 15th November 2008, 11:38 PM   #93
Stuey is offline Stuey  Australia
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Hi Pano,

Hmmmmmm....I note your first post mentioning about room size - how do you reckon these'd cope with a room of about 65 square metres?

Cheers

Stuey
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Old 16th November 2008, 01:10 AM   #94
Pano is offline Pano  United States
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Good question.

That's a big room.

For about 4 years I ran these tweeters with a cheap 12" woofers in a big sealed box at work. Huge room, about 45x50x22 feet. Or almost 50000 cubic feet. Maybe 7 times the volume of your room. They did very well indeed at only a few watts.

We are talking 12" woofer in a big sealed box vs open baffle, but I know the tweeters can handle it - I suspect the woofer should be able to as well.
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Old 16th November 2008, 02:29 AM   #95
Stuey is offline Stuey  Australia
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Thanks. I've also been considering a 12" crossed to a CSS FR125 but your thread caught my eye...

Some thinking to do.

Cheers

Stuey
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Old 16th November 2008, 03:05 AM   #96
Pano is offline Pano  United States
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Yeah, there's no reson the CSS shouldn't work, just as some of the other small full range drivers like the TB W4-1320SC 4" bamboo or its 3" brother.

Planet 10 Dave suggests I try the Fostex FF85k. It's actually smaller than the tweeter I'm using now!
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Old 17th November 2008, 02:31 AM   #97
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I've often seen the little TB 2-inchers, and thought that about the only thing I could come up with to use one for would be as a tweeter that either played unusually low, or was a dipole. Some of the 3 inch drivers would no doubt be good, but for a xo at 1100 I'd be curious to know how the real little ones stood up. There are even some 1 inch drivers floating around, aren't there?

It seems like if they're good for anything this would have to be it...
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Old 17th November 2008, 06:27 AM   #98
Stuey is offline Stuey  Australia
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I've recently knocked up a pair of Hi-Vi B3S (3" driver) sealed boxes for the bedroom (for FM radio only) based on a Zaph design. While I am quite impressed with their sound, I think they'd not be quite good enough for a high range driver in a 'higher quality' speaker.....although they'd make an OK job of it.

Admittedly mine are run full range which I think would affect the treble clarity a tad. Still, they handle cymbals and suchlike quite well.

Great little driver, though, for the give away price.

Stuey
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Old 19th November 2008, 02:31 PM   #99
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to save money on huge inductor, small inductor and resistor in parallel with woofer can be used. see attached example simulation (not the sls woofer)
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Old 19th November 2008, 02:58 PM   #100
badman is offline badman  United States
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Quote:
Originally posted by panomaniac
Yeah, there's no reson the CSS shouldn't work, just as some of the other small full range drivers like the TB W4-1320SC 4" bamboo or its 3" brother.

Planet 10 Dave suggests I try the Fostex FF85k. It's actually smaller than the tweeter I'm using now!
He's right too, great little driver.
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