2-way with wide dispersion and low distortion. Linear CTA-2034. Mechano26

[XMechanik]

Indeed, the front panel layout sketch is missing, I'll try to fix it soon.
Regarding the sim-measurements discrepancies I'm trying to make an inspection of the prototype implementation, including disassembling the filters, measuring all components, and possibly re-measuring the raw drivers. I'll report back my findings (if I have any).

 

[Ktacos]

Appreciate the effort in trying to figure out the sim mismatch. I just tackled my last issue regarding that and it was that I was taking measurements for filters with a class a/b amp, but when the xover was assembled I'd have it hooked up to a class d with load depdency. My captured impedance data was also off. Tracking those problems down fixed my issues. Not sure if that helps.

 

[Ktacos]

Well dang, woofer is out of stock at madisound. Puts a damper on finishing mine anytime soon.

 

[XMechanik]

Just realized, it doesn't look like the driver locations on the baffle are specified?

I've added a sketch of the front panel to the first post. Incidentally, I discovered a problem with the front panel width shown in the first post. I noticed it's different by a few millimeters from the width I had in the diffraction simulation file. I confirmed this with a ruler – the actual width is 188 mm, not 184 mm. On the other hand, I also checked the diffraction simulation for184 mm width, and the difference is almost invisible.

 

[vinyl_pl]

Can we expect any new information about this project in the near future?

 

[Ktacos]

My cabinets have been done for awhile, but I contacted madisound and they don't have any plans at the moment to order anymore of the MFC woofers so might be out of luck.

I may toy around with another woofer, but it's gonna be tricky to find one that keeps it's width as high up as the MFC. I'm currently playing with a Dayton Sig150 which seems to be a decent match, but will have to measure to know. Of course this is not really relevant to the original project so any updated I might make won't be here. I don't want to derail the thread too much.

 

[Cxp073]

My cabinets have been done for awhile, but I contacted madisound and they don't have any plans at the moment to order anymore of the MFC woofers so might be out of luck.

I may toy around with another woofer, but it's gonna be tricky to find one that keeps it's width as high up as the MFC. I'm currently playing with a Dayton Sig150 which seems to be a decent match, but will have to measure to know. Of course this is not really relevant to the original project so any updated I might make won't be here. I don't want to derail the thread too much.

View attachment 520731

How do you like them? I'm tempted to build a pair to complement my mechano23 build . Fortunately the drivers are available in the UK.

 

[XMechanik]

Can we expect any new information about this project in the near future?

The problem, as usual, is a lack of free time, but things are slowly moving forward. I've taken a full set of measurements for one set of raw drivers, and I plan to do another set. Then I'll try to make some summary, maybe even a project revision.

 

[vinyl_pl]

The problem, as usual, is a lack of free time, but things are slowly moving forward. I've taken a full set of measurements for one set of raw drivers, and I plan to do another set. Then I'll try to make some summary, maybe even a project revision.

thank you for the explanation and I can only wait for revision number 2, unfortunately in the meantime the prices in the basket at the parts store have gone up by 10%, so... ;0)
On a different note, I don't see an explanation of what type of enclosure it is (closed, bass-reflex) and I don't see details about the bass-reflex port, maybe it won't be clear to less knowledgeable people.

 

[XMechanik]

Several screensshots concerning the assumed/achieved box tunning are available in the post #22 link. The enclosure is 40Hz bass reflex, the tuning frequency can be determined by the minimum of the cone NF characteristic (the yellow curve on the first pic).The enclosure has a rockwool filling. The port is slotted and it's located on the rear panel. Using a pipe port would be probably just as good.