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Old 11th July 2005, 11:03 PM   #11
PeteMcK is offline PeteMcK
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Default ...the result...

added a piezo for some sparkle, & xo'ed (6dB/oct) at ~130Hz to a Hi-Q (Qts = 1.46) woofer, using the loudness switch on my amp for EQ.
Only prob is that the Sony (#125-11) can only handle 4W, so breaks up a bit if I push the low mids, might try a higher Xover
Initial impressions - very natural balance on jazz, I like it. Gonna try something similar with my Peerless drivers.
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Old 11th July 2005, 11:15 PM   #12
planet10 is offline planet10  Canada
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really nice chunk of wool felt there...

do you have the oval hi-passed?

dave
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Old 12th July 2005, 10:57 PM   #13
PeteMcK is offline PeteMcK
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Default yep,

Hi Dave,
I'm using 115uF, might cut it back to 68.
On further listening, I'm still very happy with the balance, although the Kick drum doesn't hit you in the 'nads, the speaker has a very even sound, particularly for Bass, all the way down. Fs of the woofer is 33Hz. I'm amazed by the naturalness of the piezo too.
Cheers,
Pete McK
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Old 13th July 2005, 04:26 PM   #14
Cal Weldon is offline Cal Weldon  Canada
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Default Re: yep,

Quote:
Originally posted by PeteMcK
I'm amazed by the naturalness of the piezo too.
I've always been amazed by the piezo tweeter too. But in a slightly different light mind you. My amazement has to do with their modus operandi not the sound quality. Can't say I've ever thought of a piezo as "natural" sounding. Industrial? yes, natural, no. How is it crossed over?

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Old 13th July 2005, 10:50 PM   #15
PeteMcK is offline PeteMcK
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Default ..as someone here recommended..

Hi Cal,
I don't know who posted this method,
but I used .68uF, followed by 22 ohms in parallel then 33ohms in series with the driver. (values aren't strictly as recommeded, I used what I had). This gives no obvious transition, but there's plenty of hi end energy. Cymbals & snare drums sound real...
and no harshness that I would have expected. Perhaps because the Xover freq is fairly high. Anyone know what the xover frequency is using this method?
Pete McK
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Old 13th July 2005, 10:54 PM   #16
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Piezo XOs
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