I'm thinking of going with either 5.25" or 4x6 speakers (eclipse or MB Quartz) for my front doors. I've had 4x6 plate speakers (Infinity) in there for a year. They don't produce much bass. Does a round or elliptical speaker produce better bass/sound? I guess it's very hard to hear the difference but to me an elliptical speaker doesn't seem capable of producing a round soundwave.