Do you Think Altec model 19 is outdated speakers ?

Altecs done right.  Tri-amped Super Big Reds in furniture-grade cabinets with a one-off electronic crossover and one-off eq units for the horns.  I bought these from a recording studio that went out of business.

Yes, those are original 15 ohm Chartwell LS3/5as sitting on the floor in "10" condition.  

https://youtu.be/iGa9259pz-I

what supertweeters are you using?

@toddalin  OUTSTANDİNG .

@mdalton .Altec Model 19 s super tweeters apparently prototype of  one the 7 ever made  but never manufactured whatever the reason !  similar to 604 G Tweeter section İt has got a toggle switch 96 to 98 db sensitivity . My chief engineer back in 1974 A. İngles acquired from KDKA radio station from Pittsburgh  case made by myself painted in white to matched Model 19 speakers at back of Tweeter marked ALQ 005. also Altec model 19 manufactured in white finish 16 pairs I've been told .

Crites or something like that makes new crossovers.might check into that if you feel you need to update. I did on my voice of theater and it helped.enjoy the hunt