I have both the model 6 and a pair of 17's. The 6's go deeper and I love them (my mains currently) but the 17 has a "special" quality to it if you will, especially in the midrange IMHO
your favorite?
The woofers are the same in the 5 & 23 as are the tweeters. The model 6 has the same woofer basket but a 3 lb. lighter magnet structure and an identical looking, but lighter cone. System reonance is about 45 cps on a 5 or 23 and around 55 cps. on the 6.
The 5 also uses a pair of the famous fullrange used in the model 11 portable and model 8 radio, but only for midrange coverage in the 5.
Cabinet volume is the same on the 5 & 23 although the styling is quite different. Bass on the 5 & 23 is identical.
The 5 has a very sophisticated crossover network where the 23 has a ridiculously simple one (1- 4 mfd. cap &3 resistors. ) I still can't figure why a 23 sounds as good as it does.
Replacing caps & resealing the porous surrounds & dustcaps on any vintage KLH is vital if you want to really appreciate how friggin' good these mutha's can be. :thmbsp: Dave
The best sounding KLH are , in that order, the 5, the 23, the 6, and the 17
This is, according to some people who had them before.
So in another word, these 4 are worth having, they are all excellent.