Yes, if you market it as 'vintage' to the right crowd
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On the original topic, a new L-100 for $4k seems too expensive. I bought a pair of them in 1973 for about $280, if I remember correctly. That was with a military discount – I believe the retail price at the time was $400. With inflation, does $400 in 1973 become $4000 in 2018? I found the old JBL L-100As (with the modified crossovers I built) could be satisfactorily replaced by a $2k speaker.
My biggest question for the new L-100 is about the bass cabinet tuning. For many 12" woofers, that's a small cabinet. Is the bass well damped? Or is exaggerated like the original L-100s? Their bass alignment resulted in a Q of at least 1.0. Those old woofers would have done better in a much larger sealed cabinet – too large for any 'bookshelf' cabinet. I would hope those new woofers are suitable for those ported cabinets.