Pick my enclosure

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What would you pick and why?

Primarily music listening, no sub, floor standing type speaker.

An externally hosted image should be here but it was not working when we last tested it.


I think I like the orange one.

BTW, if you read my other thread, these t/s specs are the average of my 4 measurements, plus PE's tested numbers, plus the numbers from here, http://www.ratch-h.com/ashley.html .
 
Maybe a little more background would be good here.
This is a rework of the Dayton 8 design, The primary purpose is to have good sounding speakers, to increase the SAF factor by decreasing the size of the enclosure, and to learn something in the middle.

On the chart, the Blue line is WyaneJ's recommendations for a box, the white is Dave Tenney's, the Yellow is what WinISD defaults to as the recommendation, the Green is QB3 (quasi-butterworth from Speaker workshop), and the orange is BB4 from SW as well.

These are Dayton 8" drivers, all specs are after a 24hr break in.
They do deviate quite a bit from PE's published numbers.
I tested 4, and 2 came from that other site linked in my first post.

PE's tested Fs is actually 29.3Hz, and a Vas of 2.04cu.ft

I'm also trying to keep the size of the enclosure down a bit. 4cuft is pretty large, and I'd like to keep it between 2 and 3 if I could.

Code:
Driver A	Driver B	Driver C	Driver D	Ash 1	Ash 2		My Avg
31.317	32.84	34.863	32.892	37.7	41.64	Fs	35.20866667
1.123	1.347	1.269	1.333	1.48	1.151	Vas	1.283833333
0.424	0.441	0.501	0.445	0.479	0.517	Qts	0.467833333
2.762	3.195	3.586	3.351	3.89	2.844	Qms	3.271333333
0.5	0.511	0.582	0.514	0.546	0.597	Qes	0.541666667
0.57	0.55	0.575	0.589			Le	0.571
1.179	1.203	1.225	1.228			L1	1.20875
43.559	48.891	44.2	44.353			R1	45.25075
 
officeboy said:
And a 4" vent at 28hz is 17" long, that’s pretty long, any problems making that a 3" (makes it 9" long)

If your numbers are good, that'll be great bass; F3 at 30Hz, and F10 just under 20Hz.

I use Brian Steele's spreadsheet at diysubwoofers.org to validate port size for noise issues. Maybe somebody here knows the underlying equations?

BTW, kudos on the project. I had considered the Dayton8, but from Dave Tenney's writeup I sort of guessed that the design was unrefined. You're pursuing something that has great potential as *the* best beginner's project.
 
I think 2.5 Cuft (about 70L) is going to be just about right for the enclosure size, and this gives me quite a good chance to build the enclosures, and then test different ports, and see how they all sound, and I still have a large range available for tuning.

An externally hosted image should be here but it was not working when we last tested it.


Anyone see any problems with having 2 2.5-inch ports? One centered on the tweeter on the middle of the back. And the other very near the floor on the front? Or should I just stick with a single 3 or 4 inch.
 
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officeboy said:
I think 2.5 Cuft (about 70L) is going to be just about right for the enclosure size, and this gives me quite a good chance to build the enclosures, and then test different ports, and see how they all sound, and I still have a large range available for tuning.

Anyone see any problems with having 2 2.5-inch ports? One centered on the tweeter on the middle of the back. And the other very near the floor on the front? Or should I just stick with a single 3 or 4 inch.
Looks like a plan. I would stick with the single port as long as the length is manageable.
 
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