How good can SQ in a 4th order be?

[209er]

Hi I’m figuring out what I want in my trunk. I was thinking a 4th order as I want little to no trunk noise. I just ordered a X8 accompanied by a US(Mike). It will be going in a 2015 E350. I’m tryna run in through arm rest(port). So are they worth doing IF DONE right? will it sacrifice that much SQ.

[Joe X]

Sundown X8 is not recommended for sealed so it may not be best for 4th bandpass, anyways with the right driver and the right box 4th bandpass can work on a SQ system,  but it can take some work to find and build everything right, the easy way to get SQ oriented bass is to do sealed with a larger high quality driver.

[209er]

I understand. As for the reason I wanted to go that route I didn’t Want to go through this car and chase noises in the trunk. Only thing is to add a lil more bass And put a xs  power  batt  under hood. Keeping this car ass simple as I can. So scratch the X 8. Correct 

[Charles Phillips]

If it were me, I'd go sealed and use a Pioneer sub. They sound great to my ears and require small boxes. I would go for one or two of these if you just want sound quality (discernible pitch, dynamic, etc.) https://www.amazon.com/gp/product/B00GJXXJBE/?tag=ttr_car_subwoofer-20