2 way crossover design help

[sreten]

Originally Posted by system7

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.

[ODougbo]

no no no Zaph is not God

man I hope his knee is better

[wolf_teeth]

Originally Posted by system7

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

[ODougbo]

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.

[ODougbo]

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.

[ODougbo]

Are your ears burning? Started new project:

Canned Crossover Design - What Next?

Originally Posted by system7

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...

[ODougbo]

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.

[AllenB]

They may also support diffraction. Have you considered trying felt rings or strips?