The Boogie Board

Hi ~ First time posting for me, so Hi, and also I hope this question hasn't been dealt with elsewhere.

I recently swapped out the stock C90 speaker on my TA 30 and replaced it with an Eminence EM 12. I'm loving the upgrade, or change, as it were. However, there's a problem. The EM 12 has a very thick base, so thick that it nearly exceeds the height of the poles that attach the speaker. Is there a way to either lengthen them - maybe just by turning them a few times - or do I need to go in and entirely replace them? And if the latter, yikes, how does one do that?

Thanks in advance for your help.