Well,I just ordered a Q15 dual 1 ohm sub for my car. I had a 12w6v2 in a jl spec sealed box but after hearing the Q10 in a sealed boxed that I bought for my wife's car (hers goes lower and sounds better than my 12" ,just not as loud)I decided to go Fi also. I have a 06 Jetta and I wanted to run a sealed enclosure.I have lots of trunk space. I know that the spec sheet says 2-2.6 ft3 but is there anyone running larger and how does it sound. I want to focus on sq and very deep lows.

Build on the upper end of their recommended range, you can add polyfill if you want to lower the apparent Qtc...

Or if you really want a low-Qtc alignment, order one of those IB-optimized woofers and go IB in the trunk

Build on the upper end of their recommended range, you can add polyfill if you want to lower the apparent Qtc...

Or if you really want a low-Qtc alignment, order one of those IB-optimized woofers and go IB in the trunk

Thanks!