You haven't got any BSC. I'd try something like 1.8 - 2.0mH in the bass instead of 0.56mH. You'll also need to reduce the tweeter level a bit, maybe a 4.7 - 5.6R resistor.
I would also try wiring the bass and tweeter in phase - you should be able to hear if you have a dip at the xo frequency if you haven't any measuring equipment.
I would also try wiring the bass and tweeter in phase - you should be able to hear if you have a dip at the xo frequency if you haven't any measuring equipment.
I would try this for the woofer. Note the only resistor that's real is the green one.
Maybe this one for the tweeter, with a little more resistance added to R2
http://www.seas.no/images/stories/diykits/pdfdataheet/filter_froy.pdf
An externally hosted image should be here but it was not working when we last tested it.
Maybe this one for the tweeter, with a little more resistance added to R2
http://www.seas.no/images/stories/diykits/pdfdataheet/filter_froy.pdf
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Not sure what you're asking I didnt say anything about coils? Choose whatever coil matches the resistance shown for the coil in the xover.
Pick any resistor with a dcr within that range. A 18 guage iron core would likely be good enough.
I'm guessing here, from reading thread, that Zuhl meant Lpad (attenuation) the tweeter and not LCR (to notch).
Hi Merlin,
I found the pictures of your speaker in your other thread:
http://www.diyaudio.com/forums/multi-way/236392-help-3-4-way-loudspeaker.html
Knowing cabinet and crossover I was able to do a simulation of your speaker. The driver voltage curves reveal a correctly calculated theoretical crossover at 2.5 kHz. Unfortunately this is not the whole story and the acoustic result doesn't look very good anyway. The simulation confirms everything Zuhl has been saying: The woofer has no baffle step correction and the tweeter is too lound and of wrong polarity. Further there is a unhandled surround resonance at 800 Hz and the impedance drops to 3 ohm at 5 kHz. This is what you have at the moment. Please give me some time to come up with a proposal for a improved crossover.
I found the pictures of your speaker in your other thread:
http://www.diyaudio.com/forums/multi-way/236392-help-3-4-way-loudspeaker.html
Knowing cabinet and crossover I was able to do a simulation of your speaker. The driver voltage curves reveal a correctly calculated theoretical crossover at 2.5 kHz. Unfortunately this is not the whole story and the acoustic result doesn't look very good anyway. The simulation confirms everything Zuhl has been saying: The woofer has no baffle step correction and the tweeter is too lound and of wrong polarity. Further there is a unhandled surround resonance at 800 Hz and the impedance drops to 3 ohm at 5 kHz. This is what you have at the moment. Please give me some time to come up with a proposal for a improved crossover.
Attachments
Hi Merlin,
I see you are making good progress with your crossover, great. Based on my simulation I propose some minor modifications you can try easily. Disconnect the zobel on the woofer, split the resistor of the tweeter and wire both drivers in phase. At least the simulation looks decent now and I hope the sound of your speaker doesn't tell the opposite.
I see you are making good progress with your crossover, great. Based on my simulation I propose some minor modifications you can try easily. Disconnect the zobel on the woofer, split the resistor of the tweeter and wire both drivers in phase. At least the simulation looks decent now and I hope the sound of your speaker doesn't tell the opposite.
Attachments
Thanks Dissi, coils available for the tweeter have other resistance:
0,24 mH 0,21 ohm
1,5 mH 0,38 ohm
Have I to change something?
0,24 mH 0,21 ohm
1,5 mH 0,38 ohm
Have I to change something?
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