Whats louder. I'd like some suggestions. I need to decide between 2 12 hdc3 or a 15 fi btl n2. I only have space for a 4 cu ft box for both set. I have an aq2200d amp and will be getting a 220a alternator soon. I'd like to know what will have more spl? the 15" fi btl n2 or the 2 12' hdc3?
