Altec 420 questions.

[charly1944]

Thanks a lot for taking the time to send me these threads.They pretty much answer the questions i had about the differences between 420-A and 420-Y.On top of it in "Altec 420 Biflex listening impressions "our good GM gives suggestions about the desired cabinet dimensions.Funny enough,what he calls the "small boy" is not very far, in terms of volume, from what i have listened to.The proportions and the vent are different though.
I would be interested if some members could suggest appropriate tweeters to replace the stock ones and at what ideal frequency the 420 should be cut in order to operate on what it does best.In the different threads i have reviewed it varies between 2500 hz and 10 000hz with very different types of tweeters suggested so i am a little bit at loss.Any experience on this topic would be welcome.
Charly 1944.