Hi all you good people, I'm new to your site and although a lot of the technology and some terminology goes over my head I feel that you put good sound first and foremost.

Now I hope I'm doing this right but I would like some advice.

I got bitten by the altec bug after a visit to the repair man with, what I realise now, a substandard tube amp. He has homemade 816s with big tractic horns and tiny tweeters and it all plays effortlessy and wonderful. So I'm going to make some for myself.

I can get a pair of altec 3156s and my question is, would this be a bad idea? I know that 515 Gs are what most would recommend and with some patience I could find a pair.
But are the 3156s totally ruled out?
For the horns my friend the repairman suggests 288-16G. The crossover talk goes above my head and thats all in his hands. Happily I'm saved from venturing further into the hifi male-cow-excrement swamp and looking forward to real music listening.

Yours
Kieran C

Oh yes, one more question, what is the radius on the curved walls of the 816 opening?