Sir i couldn't figure out any idea to install both the amps, cap and the subs in a way that the install looks good and the practicality of the car is not lost.
So have temporarily installed the Phoenix Gold 4-channel amp, 2 channels running the comps and 2 channels bridged, supplying 470 wrms to the sub. Just to see if a 4 channel amp wud suffice. and yes it did 
But the sad thing is i am gonna sell the car very soon and for that reason all the hardware will have to come out....... off course 
anyways here is the final pics of the Civic install

