Do you Think Altec model 19 is outdated speakers ?

Nice and clear.

A bit boxy and the peaks in the highs would have to go, at least for me.  Seems to be adding a bit of sibilance.

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