I never quite could figure out the knock against speaker manufacturers that use off the shelf drivers?
I tend to agree with @simonmoon here although I’ve no experience like him or Eric building speakers to back it up. Companies like Scanspeak, Seas, Vifa, RAAL, Dynaudio, etc. have been manufacturing drivers for decades, and if I was building speakers I’d have to have one big set of cajones to think I could meaningfully improve on their drivers’ performance. I’d think optimizing and using better parts in the crossover along with improving the cabinet structure/design would be higher on my list than trying to design/manufacture my own driver and reinvent a pretty damn good wheel that’s already been refined to a high level. I think those who think speakers that use excellent but off-the-shelf (or modified versions thereof) are somehow sub standard are kidding themselves or maybe just have a lot of $$$ to burn. Not saying in-house drivers don’t or can’t have significant advantages as they clearly can, but in terms of the overall speaker design it’s not tops on my list of concerns given the quality of good drivers today — or at least not until we get high enough up the price scale where the other critical speaker components have already been largely addressed. But that’s me. Good/interesting post BTW.