How do I hook up my four car speakers to my head unit (25w x 4) while also hooking up a new sub and amp?

Question

I currently have four 6.5 in.Boston Acoustic coax installed in the doors that are powered by a 250w Reference 2ch.amp. I want to hook up a subwoofer to the existing amp and power the four door speakers from my head unit. Is this possible? and if so, how do I go about it. I'm also running the signal through a passive EQ. Thank you for your consideration.

Answer 1

Beware that your head unit might not supply enough power to driver the Bostons in your door. You could just get a mono channel amp for the subs, as that is what they are made for anyway and would sound better than the 2 channel on the subs. That way the subs get only low freqs.

Answer 2

Simply run the speaker wires (which are currently connected to your amp) to your head unit(Radio) directly. Then connect the subwoofer to the amp. Should be able to bridge the amp which would give you more power to your sub as well.