not saying i know how to calculate it, but isn't surface area different? as in, you don't just add the speaker diameters.
There probably is a formula to actually figure it out but I'm no cab designer. I was just going by basics and how my ear perceives the sound. A 210 always sounds bigger to me than a single 15, and a 410 seems bigger to me than a double 15 cab. Two 15's sound better to me than a single 18.
Does that make sense?
Keep Low
