OK guys, Our band (drummer, one or two guitars, bass and two vocalist) has the Carvin RX1200, (2) LS1502 speakers, a and couple monitors that we use for the gigs that do not have PA. We have only been putting vocals and acoustic guitar in the PA. We are talking about putting mics on the kick, and the electric guitar. DI on the bass. We want to do this more to get a good mix rather than more volume. It seems that the guitars especially are quite directional (the bass is too but not as much). This makes the mix sound good in some places and bad in others. As you can see we do not have subs with our PA. I am concerned that our mix will not have much oomph so to speak. I have a couple questions. The powered mixer has 4 300W amplifiers. Two of these we use for monitors two for the mains. I am wondering if I can buy unpowered subs (cheaper) to run with the LS1502 since they are 8 ohms and the amplifier will do 4 ohms. The mixer also has a subwoofer out but we would either need to buy powered subs or and additional amplifier. I am playing through a GK1001rbII and a single 8 ohm 15 speaker. Plenty loud on stage but more is likely needed out front. Any advise? Thanks!