With that said, the JBL 580 and 590 speakers regularly go on sale for very great prices and they are pretty amazing speakers. I don't think that there are many if any speakers from pre-1970 that can match or surpass what the compression driver and waveguide in the 580 and 590 can do with the upper-midrange and treble.
2 yrs ago, After my son moved out of NY to Colorado, he called me and asked what speakers to buy for his HT and stereo/Streaming use?
Knowing he was in the 1,000$ Range, I saw the JBL 590's were on sale, I said Grab them, Best bang for the Buck for sure!
Like they were a couple weeks ago for 399 each free shipping,
and No Tax. he got them in less than a week. hooked up to his 100WPC Onkyo HT Receiver.
For that Christmas, I ordered him the 12" 300 watt JBL Sub.
FF to 2 weeks ago My son comes to stay for a few days,
and I'm playing my Altec 604's and my 7 watt Per side 300b SET amp.
He Playing Bass Heavy Techno. Not particularity optimized with Altec's and 7 watts .
So I switch to my Bob Crites Cornscalla's and my 50 Watt Fairchild tube mono's.
My son says yea much better. But still not as good as his JBL 590's and JBL sub.
So I then said now are you ready to hear my actually Smaller, JBL 4430's? No sub needed.
IMHO the Best Bang for the Buck Medium/Large Vintage JBL monitors
I didn't even have to dig out my big Power Crown amp (Macro Reference)
I just used my 400 WPC QSC amp I scored at a Garage sale. $20 LOL
So he puts on his heaviest tracks, and I handed him the Remote.
Go a head you're not going to hurt anything
About 20 seconds in, he turns it down and says HOLY SHITTE Dad.
I said you didn't even have it up, the clipping lights weren't even Flickering.
I asked As good as your setup with 590's and sub?
It's NOT even a fair comparison, Like a Kia compared to his M3 Comp BMW.
It's more about how much you want to spend, not the Vintage.