Support for the DIY speaker builder

 
Jeff B.
Topic Author
Posts: 78
Joined: Mon Feb 20, 2012 8:40 pm
Location: Kokomo, Indiana
Contact:

The Kairos and Continuum Three-Way Loudspeakers

Wed Nov 11, 2015 4:22 pm

I have been asked many times about making a three way version of the Kairos and the Continuum. I know several have done so with powered woofers, however, there’s a lot that can be said for a properly designed three-way when it comes to smoothness, low distortion, and proper tonal balance, as well as having the simplicity of a passive design driven by your own amplifier.

Not only have I developed an "official" woofer module (actually two) that can be used to convert the Kairos and Continuum into three-way loudspeakers, I have made it so that it can be used to the do the same for a large number of other similar stand mounted two-ways.

How this works is all explained in this paper that you can download in pdf format:
https://app.box.com/s/a4bqr447s7ox7v9kt7r9tjui0h7yqkrv

Since Meniscus will be the supplier of these parts and soon to be kits, I will try to maintain this forum and thread for discussion and questions regarding the design.

Enjoy,
Jeff B.
Jeff's Excel Loudspeaker Design Software
http://audio.claub.net/software/jbabgy/jbagby.html
 
woodsart
Posts: 11
Joined: Tue Jan 08, 2013 9:01 pm

Re: The Kairos and Continuum Three-Way Loudspeakers

Wed Nov 11, 2015 8:05 pm

YAY Jeff....thank you!!!!!!
 
mikebarney
Posts: 5
Joined: Thu Nov 12, 2015 9:29 am

Re: The Kairos and Continuum Three-Way Loudspeakers

Thu Nov 12, 2015 9:14 pm

Jeff-
Great, thanks very much!
I'm building your "sorta universal crossover" now for a pair of North Creek speakers and a woofer/stand (10" Vifa) that I built some time ago. It measures flatter as a passive 3 way with your crossover than with the plate amps I had been using.
I hope to build the 3 way Kairos soon.
Mike
 
vnowinski
Posts: 2
Joined: Wed Sep 23, 2015 3:02 pm

Re: The Kairos and Continuum Three-Way Loudspeakers

Fri Nov 13, 2015 10:56 am

Jeff,

Interested in what makes this a "universal" circuit... how well will it work in application to other bass drivers and monitors?

-v
 
Jeff B.
Topic Author
Posts: 78
Joined: Mon Feb 20, 2012 8:40 pm
Location: Kokomo, Indiana
Contact:

Re: The Kairos and Continuum Three-Way Loudspeakers

Tue Nov 17, 2015 5:44 pm

vnowinski wrote:
Jeff,

Interested in what makes this a "universal" circuit... how well will it work in application to other bass drivers and monitors?

-v

What makes it universal (or close) is the fact that most woofers are operating in a flat, pistonic range below 500 Hz or so, and the damping resistor helps to normalize the load across many drivers, as a result a lot of woofers will tend to roll-off in very close the same way using this circuit. For the high pass section on the monitor, as long as the monitor is sealed and has a nominal 8 ohm impedance, and extends to at least 100 Hz before rolling off, then most of them will work about the same way too. Actually, the double impedance peak of a vented monitor won't upset things very much either. In the end, this circuit could work with a lot of combinations.
Jeff's Excel Loudspeaker Design Software
http://audio.claub.net/software/jbabgy/jbagby.html
 
mikebarney
Posts: 5
Joined: Thu Nov 12, 2015 9:29 am

Re: The Kairos and Continuum Three-Way Loudspeakers

Thu Dec 10, 2015 10:20 am

Jeff-
I'm interested in using your woofer design (with the SB Acoustics driver) and your universal crossover with a 4 ohm satellite. I would use your low pass crossover as designed for the woofer, and a modified version of your high pass for the lower impedance satellites. Any suggestions on cap and resistor values to start experimenting with? Or is a 4 ohm speaker just not feasible with this design?
Thanks very much.
Mike

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