DIY Open Baffle Full Range Speakers from Wal-Mart . . .

[Kensai]

And a gratuitous rear shot. Please notice my classy use of 3' lengths of freebie CAT5 remainders for speaker wire.

[planet10]

Originally posted by Kensai
And a gratuitous rear shot. Please notice my classy use of 3' lengths of freebie CAT5 remainders for speaker wire.

You should try a single pair out of the bundle -- better if you untwist them.

dave

[planet10]

Originally posted by Kensai
This is a close up of the driver. You can almost make out the OfficeMax logo on that center binder clip at the top.

Are the cones aluminum or just painted... You'd get better horizonal disepersion and a wider sweet spot with more extended top if you rotated them 90 degrees.

Look like a good candidate for phase plugs

dave

[Kensai]

I'm actually using one wire from each pair for + and the other wire from each pair for -. Sounds just the same as using the 10' lengths of standard 10ga speaker wire that I run in the living room.

They call the cone material "pearl mica P.P." so I'm not exactly sure what its made from. It feels somewhere between a treated paper and propylene.

I had thought that they might do better mounted vertically. I've actually had the fresh pieces foam core to make baffles for that set up for several months now. Just haven't come across the proper time/motivation quotient needed to get me to do the work yet.

I'm interested in trying to mod these with phase plugs. The whizzer is paper, and the dome in its center is about 3/4".

Kensai

[mrpopgun]

I'm wondering how low these B200 OB mounted go before you get to -3db? See, I'm interested in playing with these, but I don't have the cash for any more than (2) B200 drivers. I do have a HSU Research VTF-2 sub that crosses over up to about 125hz, but I'm not sure if I'm going to leave a big hole in the spectrum trying to do this.

Assuming the these speakers will mate with the above subwoofer, would this system be able to do double duty with home theater as well at moderate levels?

[planet10]

Originally posted by mrpopgun
I'm wondering how low these B200 OB mounted go before you get to -3db? See, I'm interested in playing with these, but I don't have the cash for any more than (2) B200 drivers. I do have a HSU Research VTF-2 sub that crosses over up to about 125hz, but I'm not sure if I'm going to leave a big hole in the spectrum trying to do this.

Assuming the these speakers will mate with the above subwoofer, would this system be able to do double duty with home theater as well at moderate levels?

Unless you have a tolerance for a very large baffle, the baffle size will limit the reach at the bottom, not the driver.

Relieved of doing bass these should be more than adequate to do HT....

dave

[mrpopgun]

Hmmm, so then how do you determine the correct width of the baffle to tune the bass response so that is is easily crossed over to the sub? Adjusting the baffle width is a type of Baffle Step Correction (new concept to me) is it not?

How does width vs height of the baffle play out?

Wait, maybe I shouldn't be asking all these questions. I think I've just about talked myself into a pair of these

[el`Ol]

I did some simulation to compare them to my Ciare HX201, they also do well in a 2 meter folded TL.

[Scottmoose]

To give one example, a 26" wide baffle will begin to run into baffle-step issues (-3db point) at around 175Hz I believe.

[mrpopgun]

I always see OB and references to the width of the baffle. What about the height? I would think that both have to be taken into account, but have no idea what the relationship should be.