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Old 23rd May 2008, 02:00 PM   #101
Vix is online now Vix  Yugoslavia
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Quote:
Originally posted by Nelson Pass
I posted a filter schematic for the crossover used on the OB D9nf's
here:

http://www.diyaudio.com/forums/showt...51#post1516851
I draw a mock-up circuit that could work. (I am not 100 % sure)
The notch filter at HP part is omitted, assuming that one would use PC-based source and Foobar 2000 player and could use its equalizer for frequency correction...
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Old 26th May 2008, 02:25 PM   #102
Vix is online now Vix  Yugoslavia
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Hi,

Sorry to shift this threat into discussion about active crossovers, but I can't resist...

My question to Nelson:

Have you tried this crossover setting:

LP-250 Hz 18db/oct
HP-250 Hz 6 db/oct

If so, how did it sound?

Thanks,

Vix
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Old 26th May 2008, 02:32 PM   #103
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Quote:
Originally posted by Vix
I draw a mock-up circuit that could work. (I am not 100 % sure)
The notch filter at HP part is omitted, assuming that one would use PC-based source and Foobar 2000 player and could use its equalizer for frequency correction...
You will want to take a look at my upcoming buffer article, as you
can get quite a bit better distortion figures on that circuit.

I like the LRC notch. How do you play vinyl with a pc based
correction circuit?

Quote:
Originally posted by Vix
Have you tried this crossover setting:

LP-250 Hz 18db/oct
HP-250 Hz 6 db/oct
No, I haven't. For a loudspeaker like this, I start with the fewest
number of poles and the lowest frequency, and adjust it upward
or add more poles as needed. I stopped at 2 poles at 100 Hz.
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Old 26th May 2008, 02:39 PM   #104
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by Nelson Pass


.........

baaaad Papa !

you're dealing with mortals here .........

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Old 26th May 2008, 03:36 PM   #105
Vix is online now Vix  Yugoslavia
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Quote:
Originally posted by Nelson Pass


You will want to take a look at my upcoming buffer article, as you
can get quite a bit better distortion figures on that circuit.


Quote:
Originally posted by Nelson Pass

I like the LRC notch. How do you play vinyl with a pc based
correction circuit?


Quote:
Originally posted by Nelson Pass
I stopped at 2 poles at 100 Hz.



Thanks!
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Old 1st June 2008, 11:03 PM   #106
DaveCan is offline DaveCan  Canada
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How are things sounding these days?
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Old 2nd June 2008, 12:34 AM   #107
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Great. I trimmed the high pass for a little higher Q with a bump,
and it flattened out the 150 Htz region. Better, it put the drivers in
near perfect phase at that point.

Very nice system. I've been flipping back and forth between an F5
and an F3 on the top. The F3 softens it out a bit, and the F5
sharpens it up. Depends on the musical material - do you want your
Playmate with a little airbrush, or do you want to see every pore?

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Old 2nd June 2008, 09:02 AM   #108
Vix is online now Vix  Yugoslavia
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Quote:
Originally posted by Nelson Pass
Very nice system. I've been flipping back and forth between an F5
and an F3 on the top. The F3 softens it out a bit, and the F5
sharpens it up. Depends on the musical material - do you want your
Playmate with a little airbrush, or do you want to see every pore?

What about F4?

I use my ZV9 for a fullranger, and so far I don't wish another amp. Yes, it is that good...

Thanks Papa!
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Old 2nd June 2008, 04:07 PM   #109
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My crossover/eq box for this is single-ended and doesn't have
enough swing to drive an F4 beyond about 4 watts. Presumably
an F4 would otherwise be fine, landing somwhere between those
two amps (numerically and sonically)
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Old 2nd June 2008, 04:30 PM   #110
Blues is offline Blues  United States
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Quote:
Originally posted by Nelson Pass
Great. ...- do you want your Playmate with a little airbrush, or do you want to see every pore?


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