Please Crtique My simple 2 Way

[Relax]

Hi there again!

I am planning on building a simple two way which involves a TangBand w3-871s in a sealed chamber of .101 cubic ft volume.
http://www.partsexpress.com/pe/showd...number=264-813

Underneath this will be a Dayton DC130BS in an MLTL that is 30" high, 32" cross section area. Tuning is 40 hz. http://www.partsexpress.com/pe/showd...number=295-301

I am planning on crossing the dayton and the tangband over around 500 hz using a simple 6db XO.

I am able to find 2.25 mh inductors which would cross the daytons at 565 hz. and the corrosponding cap values for the TangBand at 565 are 35.18 uf.

I was thinking a normal 33 uf non-polar electro with 2 -1 uf Aero poly caps in parrallel.

Whatchya think?

[morbo]

Hi Relax, I built something similar, 2 way tower with TB871 crossed to the Dayton RS225 8" driver, xo 2nd order at 500hz. The sound was very good IMHO. If I were you, I would look at a bigger woofer, and at 2nd order or higher slopes. Modelling the 871 with just a 1st order highpass at 500hz had a big uguly peak in FR at its resonant frequency IIRC.

[owdi]

I second the recommendation for a second order slope. Not only will you have a peak in the FR at the fs of the w3-871, but the rising impedance of the Dayton means the peak at 4800hz will hardly be attenuated at all.

I also second going with a bigger woofer. Due to a drop in response from baffle step, you need the woofer to be about 4-6db more efficient than the 871. How about a side firing 10" woofer which is on buyout from partsexpress right now? It's a risk, but generally a 10" woofer can handle a 500hz 2nd order xover.

http://www.partsexpress.com/pe/showd...number=299-136

Dan

[Relax]

Hrm... I really like the idea of 2 speakers only facing me. How about the 4 ohm version of the Dayton, it sports a higher sensitivty(92 db).
http://www.partsexpress.com/pe/showd...number=295-302

Could I cut the tangband at 12db and the dayton at only 6db?

This really isn't for high fi, just normal listening, mostly music and watching movies. I have bass shakers on my seats and I can't really hear under 30hz anyways.(Hearing wrecked).

If they really won't sound good, the only constrain in the project is that I already have 4 tb w3-871s.

I might be able to do the 10 incher that you showed me though, firing off to the side like you said...

[Relax]

does anyone know of a cheap 8 or 10 incher that will go up to 500hz?

I checked PE and Madisound and came up with nill. The one above has to high impedance and lower sensitivity.



Do you guys think that the Dayton won't work for sure? Or do you think Speakers need to go down to 20 hz?

[sreten]

Originally posted by Relax
Hi there again!

I am planning on building a simple two way which involves a TangBand w3-871s in a sealed chamber of .101 cubic ft volume.
http://www.partsexpress.com/pe/showd...number=264-813

Underneath this will be a Dayton DC130BS in an MLTL that is 30" high, 32" cross section area. Tuning is 40 hz. http://www.partsexpress.com/pe/showd...number=295-301

I am planning on crossing the dayton and the tangband over around 500 hz using a simple 6db XO.

I am able to find 2.25 mh inductors which would cross the daytons at 565 hz. and the corrosponding cap values for the TangBand at 565 are 35.18 uf.

I was thinking a normal 33 uf non-polar electro with 2 -1 uf Aero poly caps in parrallel.

Whatchya think?

What do I think ?

Its a pain in the proverbial when something is reposted from another thread.

Originally posted by morbo
Modelling the 871 with just a 1st order highpass at 500hz had a big uguly peak in FR at its resonant frequency IIRC.

Originally posted by owdi
I second the recommendation for a second order slope. Not only will you have a peak in the FR at the fs of the w3-871, but the rising impedance of the Dayton means the peak at 4800hz will hardly be attenuated at all.

Both of your comments refer to the use of a parallel 1st order crossover.

I recommended using a series 1st order c/o which does not have the problems you describe.

Originally posted by morbo
I would look at a bigger woofer

Originally posted by owdi

I also second going with a bigger woofer. Due to a drop in response from baffle step, you need the woofer to be about 4-6db more efficient than the 871. How about a side firing 10" woofer which is on buyout from partsexpress right now? It's a risk, but generally a 10" woofer can handle a 500hz 2nd order xover.

I also covered the baffle step issues in the oiginal thread.

Also the original thread was very specific about the size of
the driver, its low cost and the type of enclosure, for which
KelticWizard to his credit produced a number of results from
MJK worksheets.

I've also reposted under the original and suggest anyone
posts under that thread rather than this.

/sreten.