I have an Ampeg BA112 50 watt combo amp. I would like to know if I would be able to use the line out to a powered sub. I was thinking on buying a powered subwoofer to compliment the amp, making it a kind of a ghettoish mini stack. I would like some opinions on if anyone ever tried it (or something similar), and how it might sound. If I do end up getting it, I would like to know if I would be able to swap the speaker with one more suitable for bass guitar. I am willing to listen to any comments or suggestions. Yay or Nay?