My local shop has a termlab so I was curious what my system would hit. I have a 2002 nissan xterra with a hybrid psi/fi bl 18, crescendo bc2000 wired all to one ohm in a little more than an 8 cu ft box tuned to 30hz. Well I metered 141.8 for my peak and that was on stock electrical. I am purchasing an xs3100 soon and doing the big 3. Also I will sound deaden my roof, my trunk is already deaden but I will be deadening the trunk even more with some great stuff to make it heavy. But anyway was that a good number with all those factors in play?