my "Snakes" & Monacor SP-200X

Artmaster · 10th May 2006, 09:11 AM

gday!
TQWP almost done. some decoration will make latter.
quality - so-so. hi range not enough and I have to make plane middle range .... but I'm happy

Artmaster · 10th May 2006, 09:16 AM

couldn't place 2 pictures at ones. that's because next appear

Scottmoose · 10th May 2006, 11:32 AM

What did you use to size them?

Artmaster · 10th May 2006, 11:34 AM

Quote:

Originally posted by Scottmoose
What did you use to size them?

do you mean finish, or box calculation?

Scottmoose · 10th May 2006, 11:38 AM

Box calc. And finish as well actually -it looks rather good in the pictures.

Artmaster · 10th May 2006, 12:07 PM

Quote:

Originally posted by Scottmoose
Box calc. And finish as well actually -it looks rather good in the pictures.

I'd calculate it, using Russian version of John Ratter's xls file.
next time I'll tuning it higher - to 70hz and will use it with subwoofer. furthermore I will install tweeter.
thank you for your opinion about finish. it's my first hand not marble coating.

sreten · 10th May 2006, 12:31 PM

Hi,

check out the articles here :

http://www.quarter-wave.com/General/..._Articles.html

By implementing a filter, cutting back the midrange, you can improve treble.

/sreten.

Scottmoose · 10th May 2006, 12:46 PM

Yes, that finish is very impressive. Wish I could do them like that.

I think this might be why you're finding the response a bit iffy. MathCad predicted response for that enclosure, using the SP-200X. I damped it down a bit with stuffing in the first half of the line. Nothing you can do about the big hole though. Pretty good for a Weems-based pipe though. Obviously the Monacor mates well to the Weems calculations.

Artmaster · 10th May 2006, 12:53 PM

Quote:

Originally posted by Scottmoose
MathCad predicted response for that enclosure, using the SP-200X. I damped it down a bit with stuffing in the first half of the line. Nothing you can do about the big hole though.

it's should be, but I think 200 Hz hole are smooth out by damping material inside.
another trobles - hump from 7k to 10kHz. I'm just hear this and it's annoy me.

Scottmoose · 10th May 2006, 02:25 PM

Yes, the SP200 is a bit hot across this region. Short of mechanical modifications, you'll need a filer to bring it into line a bit. You can reduce the hole to only 15db by stuffing the first half of the line with 1lb ft^3 of Dacron or similar.

10th May 2006, 11:32 AM	#3
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	What did you use to size them? __________________ "'That'll do", comes the cry of the perfectionist down the ages.' James May -The Reassembler www.wodendesign.com Community sites www.frugal-horn.com http://frugal-phile.com/

10th May 2006, 11:38 AM	#5
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Box calc. And finish as well actually -it looks rather good in the pictures. __________________ "'That'll do", comes the cry of the perfectionist down the ages.' James May -The Reassembler www.wodendesign.com Community sites www.frugal-horn.com http://frugal-phile.com/

10th May 2006, 02:25 PM	#10
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Yes, the SP200 is a bit hot across this region. Short of mechanical modifications, you'll need a filer to bring it into line a bit. You can reduce the hole to only 15db by stuffing the first half of the line with 1lb ft^3 of Dacron or similar. __________________ "'That'll do", comes the cry of the perfectionist down the ages.' James May -The Reassembler www.wodendesign.com Community sites www.frugal-horn.com http://frugal-phile.com/

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10th May 2006, 12:31 PM	#7
sreten R.I.P. Join Date: Nov 2003 Location: Brighton UK	Hi, check out the articles here : http://www.quarter-wave.com/General/..._Articles.html By implementing a filter, cutting back the midrange, you can improve treble. /sreten.

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