Originally Posted by coytee
As has been clarified...yes you would need to disable the existing horns. It's easy enough to do. I presumed that would be obvious.
In my case, my beater LaScala is an empty cabinet so I don't have those horns. If I DID have them, I would have to think about the idea of selling those innards to recoup some costs, or keep them in there in case I ever wanted to sell the speaker as a LaScala.
Also, I should have probably prefaced my comment again with my predisposition of using an active (which I thought you said you have?)
If you already have an active, it is as easy as plug & play. If you do not have an active, you either have to get one or go the passive route.
In my non-expert opinion, adding a 402 and a 510 to a LaScala would be similar to adding a 396 cubic engine to your Chevelle while at the same time adding in a 350 small block.
You really owe it to yourself to hear these. That will answer most/all of your questions. You do NOT need a 3-way format for residential use with these things. You will already have overkill with the 2-way format.
Edit: Your last question.... you might have meant putting K402's on the front right/left speakers and the K510 in the center. If so, disregard my above comment as I misunderstood. I think that would work fine and sound great. I would think that for those after the N'th degree of improvement, they would want three K402's across the front....but again, once you hear them you could make that decision pretty easy.
Where are you geographically?