Please share your input. I currently have Kicker L5 12" single in a smaller sealed bob pushed by Kicker KX 600.1. I am looking for maximum SPL on the budget. Should I just get a bigger vented box and call it a day or should I save up for another 12 and a second amp? How much difference would upgrading to a larger vented box would it make in terms of SPL? I know 2 12s with a second amp would be the way to go but that would be in the future...for right now, would it be even worth upgrading to the larger vented box or should I not even bother?

Thanks in advance