The low end stuff I noticed was keyboard related, not vocals...
Bill, you may want to check your global EQ settings, which can make a huge difference with the 950 and 970.
Another thought, the position of the L1 compact in relation to hard surfaces behind you also has a bearing on the lows - anything closer than three feet to a wall will do this.
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)