I don't have any experience *building* cabs, but I've *listened* to quite a few. When I was shopping for guitar cabs I narrowed it down to wanting Celestion Vintage 30 speakers, so I tried all the makes that I could find that offered that speaker loaded into a 4x12. I tried the Mesa/Boogie, Marshall...

I used to have one of those things! I bought mine used and that one also didn't come with the manual. Instead the guy at guitar center gave me the manual to a 424. There wasn't much difference in the two units so it worked just fine. http://www.tascam.com/products/424mkIII/pdf/Porta_424mkIII_manual....