I moved the sketches for the loft so they won’t intersect the main box. And it works that ways. It’s strange, and I’m not sure it’s the real reason it failed before.

Thanks, I verified the sketches twice, there’s no open wire. Fun fact, if I delete all the other objects, Freecad can happily make the loft…

thanks, I’ll try that. so far I only used the Part Design and Sketecher workbenches, I’ll try the Draft.

3D printing, I plan on placing the left angled side (of the top left sketch) on the printing bed, this way I should avoid supports.

I will try a AC filter if I can find one at a decent price.

Will I get the high frequencies back if I remove L2?

That’s my question, how do I get rid of the crossover. In my limited understanding of electronics, the c3 capacitor will do nothing if terminals 11 and 12 are open. I’m not sure though.