anyone have any suggestions for an nbs chevy ext cab?

[freightdriver 10+ year member]

i've got my hc15 but i cannot stand not having my backseat so i'm looking for something to replace it that'll be equal or louder maybe 4 10's or 4 12's anyone have any suggestions?

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[Wowimzz 10+ year member]

well 4 10's = about a 15 and 4 12's = about a 18, depending on the subs you will have the same amount of space if not more taken up