John I will let you know, good idea, as the M22 and EP600 didn't have that warmth of the M60, it still felt to be missing something, very good but not full. This would suggest it's the 6 1/2" driver that is warming things up.
The 500 & 600 take deep dives at 100Hz. The 400 though keeps steady up to 150Hz and then rolls off. Maybe the 400 is a better match with the 22s at the present moment. Jason, we should have pulled out my Sony sub which has a 3dB point at 170Hz and then rolls off at 6dB/octave after that. This is something we can try next time.
Oh yeah...let me know too please.
