Two way crossover with no capacitors

Sagen · 3rd January 2013, 07:45 PM

Hi

I have made a crossover with 2 inductors and 1 resistor.
Using Scanspeak 6600 and Seas Excel 6.5".
It sounds realy great, the tweeter is so smood.
I know the Excel have a peak at around 5k Hz but this is no problem in my ears. What do you people think of the filter?

The 0.12uH is 12 awg and the 1.8uH is 16 awg.

PeteMcK · 3rd January 2013, 09:16 PM

inefficient, the resistor is wasting power

bambadoo · 3rd January 2013, 09:20 PM

This is like ar-sxo right?
AR-SXO - Acoustic Reality - Designed and built in Denmark

esl-fan · 3rd January 2013, 10:31 PM

not a good idea IMO

bambadoo · 3rd January 2013, 10:38 PM

Have used it earlier with great results myself.. (ss9800 and 15w8530k00)....
That resistor is burnin some power yes...
Using parallell XO with my speakers today..

martin clark · 3rd January 2013, 10:58 PM

Horrible idea when the best of inductors is at least 20dB less linear than the worst of capacitors.

speakerdoctor · 3rd January 2013, 11:18 PM

Another version of that is the xo design employed years ago by Sonus Faber in their highly regarded and very expensive Extrema speaker.
The SFE design inspired my 'Intimates' speakers. Introducing the "INTIMATES" (high WAF & quality sound)
I solved the resistor power dissipation issue using my vent. Visit the link for details. Strangely though, efficiency ended up about 84 dB @ 2.83V - not much different than many commercial high end 2-way mini-monitors.

Sagen · 5th January 2013, 09:15 AM

speakerdoctor, the SFE crossover was what inspire me, the sine-cap.
Have a friend that made a pair of replica SFE in the late 90th.
With the right tweeter and bass. They were extrem heavy driven.
Only big Mark Levinson and Dynamic Pricusion made them play at there full.
Some hade to do with the resistor(s) to the tweeter in the crossover.
Try to eliminate this with the new filter. Or am I way out? ( out biking as we say here up in the north )

wolf_teeth · 5th January 2013, 06:42 PM

Quote:

Originally Posted by Sagen

Try to eliminate this with the new filter. Or am I way out? ( out biking as we say here up in the north )

You eliminate your resistor, and your amp will likely die.
Wolf

3rd January 2013, 09:16 PM	#2
PeteMcK diyAudio Member Join Date: Feb 2002 Location: Western Sydney	inefficient, the resistor is wasting power __________________ Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency

3rd January 2013, 11:18 PM	#7
speakerdoctor diyAudio Member Join Date: Sep 2006 Location: New England	Another version of that is the xo design employed years ago by Sonus Faber in their highly regarded and very expensive Extrema speaker. The SFE design inspired my 'Intimates' speakers. Introducing the "INTIMATES" (high WAF & quality sound) I solved the resistor power dissipation issue using my vent. Visit the link for details. Strangely though, efficiency ended up about 84 dB @ 2.83V - not much different than many commercial high end 2-way mini-monitors. __________________ "It's all about the music!"

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3rd January 2013, 09:20 PM	#3
bambadoo diyAudio Member Join Date: Feb 2003 Location: West Coast of Norway	This is like ar-sxo right? AR-SXO - Acoustic Reality - Designed and built in Denmark

3rd January 2013, 10:31 PM	#4
esl-fan Banned Join Date: Dec 2004	not a good idea IMO

3rd January 2013, 10:38 PM	#5
bambadoo diyAudio Member Join Date: Feb 2003 Location: West Coast of Norway	Have used it earlier with great results myself.. (ss9800 and 15w8530k00).... That resistor is burnin some power yes... Using parallell XO with my speakers today..

3rd January 2013, 10:58 PM	#6
martin clark diyAudio Member Join Date: Jul 2003 Location: Bath, UK	Horrible idea when the best of inductors is at least 20dB less linear than the worst of capacitors.

5th January 2013, 09:15 AM	#8
Sagen diyAudio Member Join Date: Jan 2013 Location: Oslo	speakerdoctor, the SFE crossover was what inspire me, the sine-cap. Have a friend that made a pair of replica SFE in the late 90th. With the right tweeter and bass. They were extrem heavy driven. Only big Mark Levinson and Dynamic Pricusion made them play at there full. Some hade to do with the resistor(s) to the tweeter in the crossover. Try to eliminate this with the new filter. Or am I way out? ( out biking as we say here up in the north )