Thanks for your work.
I spent some time this morning seeing if I could tilt the listening lobe the final 3 degrees...
gregrueff
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Good stuff Dave.
Thanks for your work.
I spent some time this morning seeing if I could tilt the listening lobe the final 3 degrees... -
Hey cheers, and welcome to the party!
The Duelund concept looks exotic, and it really thrives for math geeks who like perfectly solved systems (and...Leave a comment:
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Excellent suggestion on the measurement technique!
It's way easier to reposition the cabinet on the stand than move the mic.
...Leave a comment:
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Oh okay.
This is a new analysis technique to me, so sorry if I'm not understanding.
I couldn't figure out a way...Leave a comment:
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I'm being dense, but do you mean this one:
Or this one:
...Leave a comment:
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A quick HD sweep seems to confirm that the transition from midrange to tweeter is not overly strained, at least at these levels taken at approximately...
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I think I've also come to a good place on the crossover where I can start listening to music and adjusting baffle step as necessary, etc.
I was...Leave a comment:
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Not a bad idea.
I have some old ceiling tiles lying around actually....Leave a comment:
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Haha, yes of course. Thanks Chris.
Too many numbers on the brain I guess.
...Leave a comment:
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I spent a lot of time today trying to diagnose the dip/peak combo around 7 kHz seen in my tweeter's response.
I tried applying felt wool under the...Leave a comment:
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Ha! Leave it up to my user error to completely misunderstand PCD.
Thanks for the tip Ben....Leave a comment:
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I appreciate the time and effort you took to model this yourself.
I wasn't completely able to replicate your curves in my model which is curious....Leave a comment:
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Well I tried your suggestion out, but an 8 uF cap just doesn't have the oompf to hit the slopes I need.
I did some additional research on...Leave a comment:
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Okay, I think I get what you're saying.
If I look at the woofer's impedance network below, it does in fact dip to around 2.8 ohms after 2 kHz....Leave a comment:
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My model is predicting that the impedance stays nice and healthy in the bass until the 4 ohm midrange impedance starts to take over. Refer to the first...Leave a comment:
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I would say the oak "frame" of the cabinet is 1-2 mm proud, with the grille recessed just a touch.
It is possible the grille does not...Leave a comment:
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Measuring the tweeter uncovered some more unforeseen problems.
The most important is that I only ran three (3) wires internally for the midrange...Leave a comment:
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The midrange similarly is able to hit the Duelund slopes with second order electrical filters on both the high pass and low pass side.
...Leave a comment:
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Luckily I hadn't destroyed the tweeter in the other cabinet so crossover prototyping began today!
First the woofer.
A nearfield mic...Leave a comment:
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