Sub out of phase?

Steven Norris Silver Member Username: Stnorris Eldridge, IA US Post Number: 391 Registered: Apr-06	Posted on Friday, June 16, 2006 - 05:28 GMT what exactly is it when a sub is out of phase? how do you know if your subs are out of phase? what exactly does that 180 - 0 phase shift do on the amp?
Steven Norris Silver Member Username: Stnorris Eldridge, IA US Post Number: 394 Registered: Apr-06	Posted on Friday, June 16, 2006 - 06:59 GMT bump anyone know, or are these stupid questions???? lol.