DOTW xover help

[lee]

Please feel free to give any advice as I am very new to this.These speakers will be placed 2 ft off a back wall,and 10ft from one side wall and 20+ from the other.Also powered by a amp that will handle the 4ohm load.I have looked at this tweeter for this project.
<A HREF="http://www.madisound.com/cgi-bin/ind...14766&pid=1000">http://www.madisound.com/cgi-bin/ind...14766&pid=1000</A>
Then going with the DOTW 7" DA175-8 x 2 per box in a WWT arangement.The box will be 1.5 cuft tuned to 30hz.With a baffel of 23x8.5.Here is my Xover as of now.
C1 = 8.292 µF, Polypropylene, 0.00557 ohms
C2 = 14.45 µF, Polypropylene, 0.00443 ohms
L1 = 0.764 mH, Air Core(#18), 0.399 ohms
L2 = 0.486 mH, Air Core(#18), 0.313 ohms

Tweeter
Impedance EQ

Req = 4.8 ohms

Ce = 2.17 µF
L-Pad: 2.00 dB

Rp1 = 0.987 ohms

Rp2 = 18.54 ohms

Woofer
Impedance EQ

Req = 2.9 ohms

Ce = 23.78 µF
C1 and L1 are for the tweeter.
No BSC has been added..Im new to this so any help would be great.All calculations are from Xover 3 Pro..

[nicholas_23]

Xover pro does an ok job but I would seriously consider measuring these during the build process and tweek from there.
From what Xover pro shows and what I measure with SE, have shown the SPL and xover point to be quite a bit different.

> Please feel free to give any advice as I am
> very new to this.These speakers will be
> placed 2 ft off a back wall,and 10ft from
> one side wall and 20+ from the other.Also
> powered by a amp that will handle the 4ohm
> load.I have looked at this tweeter for this
> project.
>
> <A HREF="http://www.madisound.com/cgi-bin/ind...14766&pid=1000">http://www.madisound.com/cgi-bin/ind...14766&pid=1000</A>
> Then going with the DOTW 7" DA175-8 x
> 2 per box in a WWT arangement.The box will
> be 1.5 cuft tuned to 30hz.With a baffel of
> 23x8.5.Here is my Xover as of now.
> C1 = 8.292 µF, Polypropylene, 0.00557 ohms
> C2 = 14.45 µF, Polypropylene, 0.00443 ohms
> L1 = 0.764 mH, Air Core(#18), 0.399 ohms
> L2 = 0.486 mH, Air Core(#18), 0.313 ohms

> Tweeter
> Impedance EQ

> Req = 4.8 ohms

> Ce = 2.17 µF
> L-Pad: 2.00 dB

> Rp1 = 0.987 ohms

> Rp2 = 18.54 ohms

> Woofer
> Impedance EQ

> Req = 2.9 ohms

> Ce = 23.78 µF
> C1 and L1 are for the tweeter.
> No BSC has been added..Im new to this so any
> help would be great.All calculations are
> from Xover 3 Pro..

[johnastockman]

> Please feel free to give any advice as I am
> very new to this.These speakers will be
> placed 2 ft off a back wall,and 10ft from
> one side wall and 20+ from the other.Also
> powered by a amp that will handle the 4ohm
> load.I have looked at this tweeter for this
> project.
>
> <A HREF="http://www.madisound.com/cgi-bin/ind...14766&pid=1000">http://www.madisound.com/cgi-bin/ind...14766&pid=1000</A>
> Then going with the DOTW 7" DA175-8 x
> 2 per box in a WWT arangement.The box will
> be 1.5 cuft tuned to 30hz.With a baffel of
> 23x8.5.Here is my Xover as of now.
> C1 = 8.292 µF, Polypropylene, 0.00557 ohms
> C2 = 14.45 µF, Polypropylene, 0.00443 ohms
> L1 = 0.764 mH, Air Core(#18), 0.399 ohms
> L2 = 0.486 mH, Air Core(#18), 0.313 ohms

> Tweeter
> Impedance EQ

> Req = 4.8 ohms

> Ce = 2.17 µF
> L-Pad: 2.00 dB

> Rp1 = 0.987 ohms

> Rp2 = 18.54 ohms

> Woofer
> Impedance EQ

> Req = 2.9 ohms

> Ce = 23.78 µF
> C1 and L1 are for the tweeter.
> No BSC has been added..Im new to this so any
> help would be great.All calculations are
> from Xover 3 Pro..

I have to agree with Nicholas about XO Pro...I tried a few variations from XO Pro for a 2-way I was doing and none were acceptable. Then I used Jeff Bagby's PCD program at <A HREF="http://www.pvconsultants.com/audio/frdgroup.htm">http://www.pvconsultants.com/audio/frdgroup.htm</A>
and the result was much, much better! And quite different than the alignments from XO Pro. PCD uses the test files (.frd and .zma) available for the drivers, where XO Pro does not. But, individual ears are different, so what sounds "right" to one, may not be that way for another. So if you're interested in a little experimentation, and it fits within your budget, you could try both and see what you like. Some of the folks here have used PCD and come up with some great designs; plus it allows you to play around with the values to see how it affects response. Good luck!

John A.