Jan 10, 2008 12:40 pm I see what your saying here. I tend to stray away from the self-powered subs. Unless, it is a match for my tops. So, if you own JBL tops, then buy the JBL self-powered sub. EAW, EAW sub. And so on. Reason being, polarity. Sometimes you would want the sub out of phase, sometimes you don't. So, just buying a random self-powered sub may cause more headaches then what it worth. Being that you have a powered mixer, means that you have to use a aux send to feed a self-powered sub, or amp. Aux send is just a terminology differance. Your monitor 1, or 2, is still an aux send. Just under a differant name. You use the aux send to feed what ever peice you want. The send end (Marked send on the board.) goes to the device. Sub, an extra amp, recording, what ever. Which send you use, wheater Mon 1 or Mon 2, is the knob you turn on your input channel. So, turning up Mon 1 on channel 1, will send only channel one out to the device. So, you are creating a new mix with the aux send. In your case. If you want the kick drum to goto the sub, you turn the aux send up for that channel. You don't want the vocal to goto the sub, you don't turn the aux send up on the vocal channel. It's that simple. I would ask you to read my two post on Wattage and SPL and the one on Crossovers. This may help in deciding which sub to go with.