I had 3 10's in my car. I just bought a 05 silverado ext cab and would like to put them in there. However due the tranny hump under seat I don't think I will be able to fit all 3 10's in single chambers and have enought airspace for each sub. The subs require .5 -1.0 qubic feet of air space. Is it ok for 2 subs to be in a single chamber?