Do you still have your sub gain at 12 o'clock with your reciver at like -10dB? I'll try to test this asap, but I get no activity from my mains until much later, and my ep500 didn't kick in until around 17-18hz. This was following my system being calibrated to 75dB, all speakers to small, 80hz crossover on the AVR and sub on bypass. Also, I followed the realtraps cd pink noise test to make sure I was at the 78dB, per instruction.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85