Thanks for your reply, in fact by the past I owned several Altec and JBL's speakers : S8R Olympus , S8/4320, DD55000 Everest, Voice of Theather with 15 multicellulars horns... Today I have a second hifi system with 4343, they sounded great, perhaps more smooth than the horns.With the horns (or the 4343) I used Audio Research SP10 or SP15 preamplifiers and Mc Intosh Mc2600 or 2500. You're right, the Horns have a great bass, I try 2402 and 2402 but I must made few little mofications on the crossover because they sound too loud.
Perhaps the good solution is to use another crossover, the Bob Crites or the ALK models. Have you heard these models? I have the AA II model.
Regards. Pascal