421-8H II bass reflex design

[leo5]

I have been working with the T/S parameters for designing a bass reflex enclosure for my Altec 421-8H II speaker. But they come out with a 2.3 cu ft box (ideal alignment?). Now having a small enclosure suits me fine, but a good sound is a priority. I play bass & electric piano. I want to build 2 boxes (I have 2 speakers), using only one for small venues and 2 for larger ones. I don't have an amp at this point ( I prefer tube amps), and that is another topic I want your advice on; which one do you recommend?
All or any help will be greatly appreciated

Thank you

[Cal Weldon]

I would do a take off from the dimensions in the link. The 1233 uses the 421 8LF but you could use the same size cabinet. Keep in mind the recess for the grill.

http://www.altecpro.com/pdfs/vintage...r%20System.pdf