Well, going into overdrive is better than playing with the EQ because the EQ probably isn't going to increase the volume equally over the entire frequency range, as I understand it, plus, it's still doing it all before DAC, so you'll have the exact same possible digital clipping issues. You might want to investigate why it's so quiet and fix that. I know I'm making an obvious suggestion, but there might be something you haven't considered. For example, I read that if you have multiple speakers attached to one output on an amp, you might end up reducing the volume depending on whether they were hooked up in series or in parallel. But now I'm just parroting. I'm in way over my head now. Then again, you might just have a weak amp know it. I know I do.