I apologize, I tried to find a thread that answered this question, but it gets frustrating to try to read through all of those threads for your answer that you would think would be obvious. I have a 150W head. I want to increase its power, but want to keep the head. Is a power amp what I want and how would I go about using it. Do I take the speaker outs from my 150 and plug those into the power amp or do I use the direct out? I was just wondering Thank you for your time.