What Does It Take To Do A Hair Trick

[tejcurrent]

what kind of suv is that?

That was my last vehicle, 99 yukon.

[mrwigglezdj]

lol i need to see if i can do a hair trick, but i think i have to redo my port and build a plug so i can tune it lower..... it slams in the the 45-60hz range but not much to speak of IMO in the low hz ranges

[fourlug]

My box is tuned low (around 30) and I'm around 148-50 @ 40hz and cant do a hair trick.. only two 15s tho.

Correct me if I'm wrong but small cabin area would also help right? (wall vs enclosure behind 2 rows of seating)