which one would be louder 2 15" or 1 18"

[audioholic 5,000+ posts]

From my experience, I'd disagree. Yeah the 15's have more cone, but the BTL has a hell of a lot more motor. We were about to get about a 152.3 @ the headrest in my buddies truck off a single 18" RE MT, and we all know how similar in output the BTL is to the MT. I doubt that the CVR's would be able to produce that much pressure.

Apples to oranges.