Find out what ohms you are running your subs?

This link will show you how to understand how wiring your sub woofers will make a difference to the total impedance your amplifier sees. Learn how to wiring your sub woofers at the correct ohms. http://qualityverticaldoors.lefora.com/2011/01/03/how-to-figure-out-what-ohms-im-running-my-sub-woof/#post0