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.