Hey guys. I've just been messing around with my new Zoom H4n and I have a question. I made some 4 channel test recordings using two cardioid and two omni condenser microphones. When combining the two stereo tracks into one stereo track without adjusting the levels between the two, for some reason the low end becomes very weak, almost non-existent. When listened to separately, the tracks are actually quite bass heavy. If I lower the gain on one of the tracks and allow the other to become more prominent, the bass slowly creeps back but I lose a lot of the detail from the mics that I lowered the gain on. I'm guessing this is a phasing issue? Any way to fix this problem without losing too much sound from one source? Thanks!