...which is to say, tell us actual numbers of what you're looking at and hearing about so that we can comment on real stuff.
A 12" woofer is usually a tiny bit larger than 12" on the outside of the basket. The actual driver surface can easily be only 10 1/2" across. This is only a problem to the amateur, as the rest of us know that this is true across all speaker sizes and we cope.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw