i am running some sony head deck 4x50
6" pioneers at the front, i think 3 way
pioneer 6x9s at the rear

2 amps in connected in seriees
1st amp driving the rear 6x9 2x75rms

2nd amp driving a 10" 100rms sub 2x50rms bridged

now question is, is it bad running the amps in series?
is it a bad combination to run 6x9s and a sub?
am i better off letting the 1st amp drive the rears or the fronts?
or just have 1 amp drive the sub?

is there anything that needs to be changed or added to the current setup?