I agree with both of Rwwear"s posts, especially the part about using a crossover on the main speakers, they should be used full range for the best sound as Rwwear says. Usually tubes just don't do it for typical subs but of course there are exceptions. If you have a large room and could build a large horn subwoofer using a highly efficient driver (98db or so) a tube amp would work fine. I've heard a few and they do it
Any tube subwoofers out there?
I was just wondering out of the blue if there were any tube subwoofers, if not why not. Also are there any class A/B or other types beside the ubiquitous Class D? Just trying to learn more. Thanks