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Old 11th February 2013, 08:47 AM   #101
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I'm finding it hard to reconsile that crossover diagram to the spl curve beside it.... If I'm reading it properly the spl trace is showing a 12db / octave slope with crossover at 2K but the crossover looks like it is 2nd order electrical. with the natural rolloff of the tweeter I would expect a 4th order accoustic rolloff with a second order electrical filter.

Is that an actual measurement or simmed?

Tony.
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Old 11th February 2013, 08:52 AM   #102
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Simmed.

btw....the imaging is pretty good, 4 out of 5 stars.
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Old 11th February 2013, 10:59 PM   #103
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Pages 2 & 3 for the SF/Vifa speaker project

Also a similar design here:

The Madisound Speaker Store

Click Crossover Schematics/Graphs
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Old 13th February 2013, 09:49 AM   #104
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These are fast becoming my favorite speakers. I've been switching around and these seem to have more range and detail; simply can hear more from low to - high.

The imaging is nice, maybe because the tweeter is mounted up high/isolated, I don't really know but something is working right

Wife said they are ugly, but really not fished either; there is room to flip the tweeter onto the front panel - could even add a bit top and bottom to give it more height, but not going to.

Neat!!! Having a blast, they sound like really expensive HiFi speakers

ordered more parts, parts, parts..........
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Old 13th February 2013, 10:18 AM   #105
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I think they are kinda cute, maybe you should paint them black and white and tell her they are penguin's

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Old 14th February 2013, 08:10 PM   #106
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So here is the scoop - Penguin vs. MS Vifa woofer/ Morel (right).

The MS Vifa/Morel is in box twice as big as the Penguin, the pint size Penguin will run circles around the larger boxes. There are way more natural sounds; the old black stain boxes need work; good bass, but that's about it.

I was surprised how little the black ones image; the boxes are 1" mdf with foam ...I'll never do that again

Plywood, felt, light wool and boxes with small fronts
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Old 15th February 2013, 09:04 AM   #107
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Penguin!!!!

But,,,,But they kick like a Kangaroo..........

joke-joke for our "down under" friends (-; (-;
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Old 16th February 2013, 01:38 PM   #108
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Anyone feel that these should not be used in this xo/speaker project?

Jantzen 1.5mH 14 AWG C-Coil Toroidal Inductor 255-804
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Old 16th February 2013, 03:24 PM   #109
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Quote:
Originally Posted by ODougbo View Post
Anyone feel that these should not be used in this xo/speaker project?

Jantzen 1.5mH 14 AWG C-Coil Toroidal Inductor 255-804
Those are really expensive, and really only justified on a higher-$ driver project. Also of note- I have a set of 4.7mH of those, and they measured 2.7 and 2.9mH. The 1.5mH I have are fine.

Later,
Wolf
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Old 20th February 2013, 11:39 PM   #110
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Default Foil Coils

Had to give them a go. I don't think they will work better then the one I'm using, but they look great anyway.
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