Hello, there are two Fi Q10d2 and the amplifier DC 5.0K, in 0,5 Ohms, Xs power d1200+d3400 accumulators (44Ah and 65Ah). Advise the optimum volume and the port area under this system? Palaniry to begin with 48 liters pure and port in 250 squares, tune to of 36-38 Hz and reducing to have a look at changes. The car, Ford Focus 2 a hatch-back, the purpose to receive is more than figures on music. Thanks in advance for councils and comments. I am sorry for my English))