i am building a box for 2 pioneer premier ts-sw1041d shallow mount subs. These subs are 250rms/1000peak and 4 ohms. I am going to run a kenwood kac-x812d amp (800rms@2ohms/1600peak). The recommended box size for one is 0.35~0.7 cubic feet. The box i am thinking of building would be 24X18X5 (0.75195 cubic feet) or 24X18X6 (0.96679 cubic feet) or 24X18X7 (1.375 cubic feet).
Which box would be better?
Will this amp be fine?