Easy stuff first, Ive accidently not seated SL connections more then once in my fury of tweaking the system. Are you running a single SL to the L/R speakers or home runs to L/R? is your G65 configured via menu or Mconfig?

808v6, 818.3, G65, G61RSL, G91DH, G08, G98DH, 500v3, 504, 218-LPS, 218, 210, MS200
8000uSE, 5200SE, 5200HSE, DSP5200 (nonSL~fully rebuilt w/ Excel tweeters), DSP3300x2, DSW.2
HD621, Pair of Revivers, AC12