osborne900

I built one of these last year which turned out really great. The original horn and flare were not available so I ended up using RCF parts. I used a B&C crossover I had to hand which seems to work fine. I don't have any way to measure response so I'm not suggesting it's going to be properly FRFR but I've had plenty of favourable comments from others about how it sounds. I came across the Convair crossovers that Blue Aran sell which might be a decent starting place and are affordable.

Good point, well made. Even though I find the 8pr200 adequately bright for my cloth ears, off axis the 12pr320 rolls off an octave earlier. I imagine even I might notice that. I’ll keep my eye out for a ph170.

Thanks for your thoughts @stevie. I’m not sure I’m going to need the tweeter as I find an 8pr200 plenty bright enough for me which rolls off around the same point (ish)and I’m missing my top octave anyway (getting old). That being said, if I do add the tweeter when the flares become available it will be a sight easier if I use the 12PR320. The frame on the FH5*0 units looks gorgeous as well not the you ever see it once installed and really shouldn’t be a consideration but who doesn’t love the look so a sexy chassis. Food for thought.

Somewhat late to this party but, hopefully, about to get my hands on one of these cabs unfinished shortly. I’m wondering if going to the Faital 12FH500 would confer any advantage over the 12PR320 aside from the obvious better power handling. I’ll be using it with a TC BH800 which, running into 8 ohms, should give me a bit of a margin. Also, it seems the PH170 flare is not available at present so, are there any alternatives that fit in the hole. Many thanks for a brilliant project.