My system is getting overhauled, but last time I put a meter in it, I did 149.8
That was with 4 10" Diamond Audio M6 subs sealed with 600 watts total.

Also, that was with the sytem playing for only 30 minutes before testing. I am sure with more tuning and woofer break in, I could have been closer to 151 or so...

Also, this is all in my sound quality car.