I have a subwoofer set in my car and it works great. But I want to add on to it and I'm not sure whether it will work or if I need to get another amp and what amp it should be. I currently have the amp go to 3 parallel 10" subs and it works fine with no problems. I want to add 2 12" subs using the 2 channels that my amp provides while the parallel unit is using the bridge connection. I have a picture of the diagram to show all my information and what I want to do. If someone could help me that would be great!
You might find more help with your question at a car audio specific website. Stereophile.com is dedicated to high end home audio.
That said, if it were me, I would get a second amp to power the 2 additional 12" subs. It is highly likely that running 5 subs off of one amp will overload it.
Good luck with your car project.