Concert sound 2 system with EQ head unit. Will I be safe with these speakers?

#1
I have the Concert Sound plug that I modified to run the front speakers in series rather than parallel.
I have a set of Pioneer 4x10s that are 4 ohms.
I have another 2 sets for the front (3.5's for the dash and 5.25") for the doors. Both sets are 4 ohms.
Would this be safe for the stock head unit?
 

newtownhood

Car Audio and Electronics guy.
#3
Yeah you're fine running the fronts as 8ohms off the front channels. Where you run into problems is when you run 4ohm speakers in parallel and drop to 2ohms.