Thanks Bob. I think I'll try the EBS alignment idea. I just want to be sure about the vent on this new design. Would the vent opening be 2" (2"x12.5"x6"deep)?Also, I asked Parts Express about the listed specs and here is the reply:
"Pe is actually max power, not RMS. THis is why this was shown this way. the driver is specified as 150w RMS and 300 MAX."