I play bass in a drum/bass sludge metal duo, and I use a lot of pedals, but especially a lot of overdrive, reverb and pitch shifter. I'm using a Hartke HA2500 head with one 4x10 right now (I know it's not good for sludge, but I'm making the best with what I have right now) and the overdrive makes the bass sound like it is just way too much for the head. I posted about this a while back thinking I had blown a speaker, but now I know it's definitely just overloading the head. The HA2500 runs at 175 watts with only one 4x10 plugged in, if I added a second cabinet it would run at 250 watts at 4 ohms. Would that be enough power to handle a really gritty overdrive? Or am I just out of luck until I can find the money to get a new rig?