what would be louder

[MTA 0]

a single 15" MT in a 3.25 cu ft enclosure with 130 sq in port area and very well rounded interior of enclosure

or

two 15" MT's with only 50sq in port area in aprox 4 - 4.5 su ft of box volume

assuming same amount of power is used peak frequency is 49 Hz if that really matters

[tejcurrent 13]

Install dependant. Plus this is the fi forum, I'd try sq and spl for more answers.

[Fi Car Audio 64]

Thats a real tough one... 50sqin isnt much at all and with any real power to those subs, the port would compress like crazy. Any way to add more aeroports on the outside of the enclosure for the pair of MTs?