Myself (the bassist), a drummer and a lead guitar/singer are starting a blues trio. Think SRV and Double Trouble, or John Mayer Trio type set up. So I am looking at my gear trying to decide what needs upgraded since I have not played in a "real band" in twenty five years. Venues will be pretty small starting out and I think I have that covered. But we may play an outdoor event next month in which I am a little concerned about volume levels. Current gear: Guitars: Custom P Bass with flats (thank you Pino) and a fretless 5 for those more "upright bass" songs. Amps: For small venues I have a Fender 15Watt Rumble and a 15 watt Laney RB1 to choose from. For slightly larger venues I have an old Big K Kustom III bass head (130 watts at 6ohms) with a couple of cabinet options, a 15" Gallien Kruger 200 watt at 8 ohms cab (should end up about 100 watts) and a Peavey 2x10 cabinet 160 watts at 16 ohms (should end up around 60-70 watts). Either cabinet works well with my head (it has to run at minimum a 6 ohm cabinet so it is really flexible solid state unit). So here is my question. Do I go and get another rig with 500+ watts for those large venues? Do I just line out into the PA so it will add to the overall volume of the speaker on stage? Do I stick a microphone in front of the cabinet and then run that to the PA? or Can I run the 15" and 2x10 together? The 2x10 has a daisy chain option but I am concerned that the 15" speaker then would be getting a serious low load. The other thing I have thought was to get one of the small powered heads (trace elliot Elf or a Crate Powerblock) and run two lines from the guitar to the rigs, small powered head at 200 watts powering the GK and the Big K powering the Peavey 2x10?