I started a 3-way dipole project that I had to shelve 10 years ago due to marriage, moving, kids, etc. Frankly the project was a bit too advanced for me at the time.
I've fallen in lust with MEH and CD speakers, patiently waiting for Waslo/Batemen/etc to figure it all out so I can have an excuse to finally buy a 3d printer. But I feel I have to bring my previous dipole to fruition before I can allow myself to embark on another build. I badly need to gain some proficiency with measurement and filter design.
So I ignored my family for a weekend to cobbled together a test baffle, just something to get the drivers mounted to and have been walking through ABCDipole and trying to remember all the things that I though I understood at the time but no doubt did not.
Initial design parameters:
I'm primarily playing withHolmimpulse, vituixcad, and Xsim. I did use REW a few months ago to get a single speaker 3way active setup to help motivate me.
So I'm having a heck of a time getting a flat response in vituixcad. I did cobble together a 3rd order filter that with a couple of hand-wound inductors I was able get one speaker sounding not bad but the frequency response is pretty lumpy.
I then stumbled across a video on xsim which made it look easy so I tried it and bam, I had a flat response and the components on hand to build two channels. But they are only 2nd order filters and I worry about the ribbon.
A couple of issues:
I've fallen in lust with MEH and CD speakers, patiently waiting for Waslo/Batemen/etc to figure it all out so I can have an excuse to finally buy a 3d printer. But I feel I have to bring my previous dipole to fruition before I can allow myself to embark on another build. I badly need to gain some proficiency with measurement and filter design.
So I ignored my family for a weekend to cobbled together a test baffle, just something to get the drivers mounted to and have been walking through ABCDipole and trying to remember all the things that I though I understood at the time but no doubt did not.
Initial design parameters:
- Fountek NeoPro5i ribbon
- JBL 2123H mid
- 2x AE Dipole12 woofers
I'm primarily playing withHolmimpulse, vituixcad, and Xsim. I did use REW a few months ago to get a single speaker 3way active setup to help motivate me.
So I'm having a heck of a time getting a flat response in vituixcad. I did cobble together a 3rd order filter that with a couple of hand-wound inductors I was able get one speaker sounding not bad but the frequency response is pretty lumpy.
I then stumbled across a video on xsim which made it look easy so I tried it and bam, I had a flat response and the components on hand to build two channels. But they are only 2nd order filters and I worry about the ribbon.
A couple of issues:
- I think that I'm overlooking something with phase that is making this more difficult than it should be.
- When I let xsim derive FRD phase, I can easily get a flat response with 2nd order filters. Haven't really tried higher order yet due to lack of parts.
- How do I compensate for the effect of the 15uF cap that I had to use when measuring the ribbon's initial FR?
