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Ok hey guys, im new to this forum. Im guessing you guys are type experts on subs if not, any information helps.


I have a 07 BMW X5 and I just bought a 15" Soundqubed subwoofer and a x14 brutus hifonics 1500 watt amp

I want to wire to 1ohms, and im doing it also to my stock head unit.


My battery is in my trunk so I don't have to wire a lot to the front of the car.

Also wiring with 4 gauge.



I was wondering what would the dimensions be for my box? length, depth width? volume?

what could my sub displacement be? and my port displacement?


Im thinking also 4.5 cubic net tuned 34-38hz


please let me know

give me ideas, info, anything

thank you so much




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We cant tell you what will fit in your vehicle so go out and measure what all space you want to use.

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