The best speakers I ever heard are my custom 4-way horns :
Two 1954 Klipschorns with JBL 1504C's below 100 Hz ;
short, straight 1:1 compression ratio exponential-curve horns with 50's vintage JBL 130A's between 100 Hz and 500 Hz ;
round tractrix horns machined from laminated MDF blocks with 60's-vintage JBL 375's between 500 Hz and 10 kHz ;
and 077 ( or 2405 ) supertweeters ( 10 kHz+ ).
The filters are 3-way 4th-order active s.s.. except for the supertweeters', which are 1st order passive - just single Hovland caps.
The amps all use 2A3 triodes : custom ( UTC LS-58's on Webster Electric Hammond organ amps ) ppp x 4 on the Klipschorns ; Brook 12A's on the upper bass, and an A.E.S ( Cary ) SE1 on the mids + tweets.
You can see pics ( plus lots of vintage gear ) at my webpage Vintage Audio Trader's - http://homepage.mac.com/Ikecarumba
Kerry Brown
aka KerrB Vintage Audio Trader