hello all: here is my rig - eden d410xlt, alesis 500 amp, vintage roland SIP-301 bass preamp. i like the sound this rig produces, but i am a fan of the mighty rigs of doom and would like to extend the bottom end size and sound. I would love to have a 115 cab on the bottom of the 410. I realize that most all the pros would say to match the 410 with another, but i think that a 15 cab would give me more of that low frequency boom i yearn for. I play progressive rock/alternative/pop in venues that range from 100 person capacity to up to 1000. the roland pre has a crossover on the back with a frequency attenuator, or full range out. how can i add a 115 to my rig without screwing up the phase? Flea uses this combination, i want to too! can i run the two cabs parallel or do i have to use the biamp feature sending the highs and lows to each side of the power amp? please help me!