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Multi-Way Conventional loudspeakers with crossovers

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Old 4th January 2013, 07:04 PM   #151
sreten is offline sreten  United Kingdom
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Quote:
Originally Posted by system7 View Post

Zaph is OK, it's some of his his friends I don't care for.

Now get a sense of humour.
Hi, What ? Like your excuses to be derogatory, rgds, Sreten.
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Old 4th January 2013, 07:12 PM   #152
ODougbo is offline ODougbo  United States
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no no no Zaph is not God

man I hope his knee is better
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Old 5th January 2013, 07:15 PM   #153
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Quote:
Originally Posted by system7 View Post
Vifa XT25 Fs correction which he makes to be a 100uF/1mH/4.7R total resistance LCR shunt at 500Hz.
Granted every driver will have a bit different parameter set, but I measured my LCR on my XT25 and got to +/- 0.5 ohms from top to bottom using a 1.0mH 20AWG (0.7 ohm DCR), 3.3 ohm resistor (to make the 4.0 ohm value), and a 150uF cap.

Pretty much resistive tweeter system impedance for my XT's.
Later,
Wolf
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Old 5th January 2013, 08:17 PM   #154
ODougbo is offline ODougbo  United States
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I'm liking them, nice well balanced sound - no mid range coloration, cool bass.
and only 12.5lbs.

Oblivious to easy**...crossovers are a nightmare unless you know a good bit about them.
Thanks Steve for the design!

E.g. working on a xo for another project, using APICS and trial & error method.
They sound good during a sweep, but are hard to listen to for very long.
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Old 11th January 2013, 01:16 PM   #155
ODougbo is offline ODougbo  United States
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I can't believe this worked (to the point where it just sounds nice).

I used the tweeter and xo from the circuit in wood bass and simply added a 1.8 coil to a TB W5 full range speaker. [roll off starts around 3,000]

The balance is nice and I'm getting wonderful sound out of the "W" boxes.
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Old 21st January 2013, 06:49 PM   #156
ODougbo is offline ODougbo  United States
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Are your ears burning? Started new project:

Canned Crossover Design - What Next?



Quote:
Originally Posted by system7 View Post
Yup, the bass filter is right. Whether that sounds right is a matter for trial and error. The treble filter would need adjusting either for low slope or a high crossover frequency. It seems the polycone bass will have a natural rolloff around 4kHz.

The reason I complicated the issue is you were following my suggestion of reducing the crossover shunt resistor. Well, that might not work with a high inductance woofer at 3-4kHz, which yours is.

I think I would have to do some modelling with a suitable 4 ohm 0.8mH driver to see how it all works. My comments may not have been entirely helpful until that is done.

Usual random pictures...
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Old 20th May 2013, 10:43 AM   #157
ODougbo is offline ODougbo  United States
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Still finding the 5.25 Peerless divers laying around, and an extra pair Vifa XT25 tweeters; thinking a MTM or MMT.

Really think this side port idea is worth pursuing, really gives the speaker a heavy sound.
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Old 20th May 2013, 11:38 AM   #158
AllenB is offline AllenB  Australia
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They may also support diffraction. Have you considered trying felt rings or strips?
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