Multiple driver problem

I'm trying to model an enclosure with two drivers, and suspect something isn't working correctly. If I change the driver number from one to two, the calculated SPL remains the same, while the cone displacement increases substantially. This is without changing Pe. I would expect SPL to rise (by about 3dB) and cone displacement to remain the same...but the opposite happens!

I'm assuming Pe is per driver, so doubling driver number will double overall power.

Thanks for your appeal. I try to check it soon.

Has this been fixed? Something also appears to be wrong with Isobaric calculations as my saved projects are no longer giving the same/similar results.

That hasn't been fixed yet. I will write here when it's done. Can you create a new topic with your issue? And describe it with more details if you have one

The bug has been fixed. Thanks for you comment.

Thanks for that. I've since moved on to a single driver solution, but will no doubt get to try this again some time.