at the headrest with the doors and windows shut? i was doing 58 almost a year ago at the headrest with the other window open with kicker woofers. and 5 dbs is too much. but like i said before, i have never checked this build on the glass, but i will. as soon as i do, ill post it. even if it is weak, ill let y'all know. someone said 56-58. thats probably pretty accurate. realy, im a streetbeater first, then modified. how many of yall that can do 160 sealed can do 58 for 30 seconds after demoing all day? probably not even half of y'all can do it. you know how y'all dont count outlaw? well, i dont count anything over 50 hz. so in MY opinion, if you are over 50 hz, you are weaker than me running outlaw. so whose to say which one of us is right?
by the way, in portwars, i have (1) 4xl 10 that does 170 with the globe on.