I would search for this but I'm not exactly sure how well any searching would find an answer for me. I currently own a Peavey 210TX combo amp and I am wanting to add some low end to it. The amp has 200 watts to supply something else and I was wondering what to add to it. Would it be smarter to add additional 10's or to add 15's? It seems like there could be cancellation issues adding anything different but I could be wrong. Please, please help me out here and share some insight on this matter.