i dun think "bass out of control or not" is a correct question, because the controller is at your hand, whether out of control or not is just depend how ur setting. every speaker have their maximum best setting for the bass. in fact u set the bass of R401 to half IMHO is the best setting for R401. for M3300 set the bass to more than half a bit at 2 o'clock is the best setting, more than the maximum suitable point will make your bass boomy. bass out of control will happen only u set the bass over the maximum suitable point. i think if u turn the bass up to full, no matter which speaker u use the bass also will out of control.