I am a happy Acme owner. My guess is that you may want to try the ACME 1x10 model. It should require less power, or perhaps some other brand of single 10, 12 or 2x8. SWR make a couple single cones you may want to check out as well.
Carvin makes a 2x10 that Bass Player liked, check them out as well.
jc
Carvin makes a 2x10 that Bass Player liked, check them out as well.
jc