I have an M-Pulse 600 (600 watts @ 4 ohms and 320 at 8 ohms) with a Powerhouse 410 8 ohm cab. I also have a ampeg PN 210 8 ohm cab. Can I safely combine these two cabs to create a 610? I have read a substantial amount of threads here and as soon as I think I understand the ohms, I realize I am still struggling with this issue. TB expertise is needed. Thanks!