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Old 24th November 2012, 02:26 AM   #11
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Quote:
Originally Posted by Brian Steele View Post
Nice work there. Now for some impedance and FR measurements, to see how close you got to the target response
That is next, but it'll have to wait for after the holiday weekend. Too many relatives to visit with....
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Old 24th November 2012, 05:36 AM   #12
maxo is offline maxo  United States
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picsssss piicssssss please
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Old 24th November 2012, 06:03 AM   #13
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picsssss piicssssss please
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Old 24th November 2012, 07:16 AM   #14
NEO Dan is offline NEO Dan  United States
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Default Great Scott!

Click the image to open in full size.

And so it begins...
It's all down from here man
Nice work.

Almost forgot, that little patent blurb is not correct FYI.
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Old 25th November 2012, 06:48 AM   #15
stewin is offline stewin  Kenya
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hi scott wow cool work
please post the response and sensitivity specs
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Old 27th November 2012, 01:19 AM   #16
maxo is offline maxo  United States
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ok, holidays over....
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Old 27th November 2012, 01:43 AM   #17
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Default As fast as I can....

Quote:
Originally Posted by maxo View Post
ok, holidays over....
Sorry guys, still trying to recover from the holidays! My wife and I adopted two little girls this year. Yikes. Very...different life! I used to go to high end restaurants and try different molecular gastronomy recipes. Now it's Hello Kitty and casseroles.

I'll try and get at least an impedance sweep done before the end of this weekend. In room response is a possibility too...anything more than that might have to take a bit.

I will say this..I'm as interested as anyone. My current sub is a dual Peerless XLS 12", 12" XLS PR in about 80L. I might prefer the sound of the Dayton. It is waaaaay closer subjectively than I ever thought it would be. When I was running all of the simulations in Hornresponse, I thought....nah...these numbers are all too good to be true. Now...I'm believing. I've got a Dayton 12" Titanic MK III design that I might build next. 6dB more output, by calc...than my dual Peerless XLS 12 sub.

My wife is so going to kill me.

Scott
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Old 27th November 2012, 02:00 AM   #18
maxo is offline maxo  United States
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ayee
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Old 2nd December 2012, 11:57 PM   #19
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Quote:
Originally Posted by maxo View Post
ok, holidays over....
Okay I was able to do a quick impedance sweep. Which took two hours, because Praxis was being weird. My thoughts:

1. It's even closer than I expected...even up to the higher order modes.
2. Looks like some bracing around the mouth might be in order...even for this sub.
3. Looks like the copper pole cap is doing it's job on inductance, though the higher than predicted impedance in the 300Hz to 2kHz is a bit weird.

Scott
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Old 3rd December 2012, 12:00 AM   #20
NEO Dan is offline NEO Dan  United States
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Looks good Scott,
REW AKA Room EQ wizard could be used to make the measurements...
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