I would have to agree with Al. If you want any kind of control you have to consider, crossovers, equalization and then to the board, in order to get some kind of sound balance on your subs. As far as amplification is concern, a good rule of thumb is one amplifier per speaker, some may not agree with me on this but, I consider the cost of break down if your on the road touring or in a harsh environment, murphy's law applies. Keep your amplifiers in a rack. I prefer to have them near the stage, watch your cabling for health and safety purposes, don't forget to gaffa tape if you have too. Keep in mind the continous wattage application, I think you measure at 10 decibals to 1 watt. Ask a pro on this one. Good luck. I hope this helps. JP.