DC XL 18 with level five soft parts

[scionicboom]

So I was wondering if anyone has herd if this I'm not exactly sure what the specs are on the sub basically right now I have a fi sp4 15 someone wants to trade a dc xl 18 with level 5 parts do you guys think this is worth it is it a reliable sub it will be in a hatch back and be ran off a cadence zrs c1 for now wud like to tune low and still compete what do you guys think

[C-Fizzy]

Keep the sp4

[scionicboom]

To be more specific it's a DC 4 XL M2 18 .......any one else have an opinionon what's better the fi sp4 15 vs the xl m2 18