Can I add another sub to my stock JBL system?

Hey folks,

I am wanting to add a powered sub to my stock JBL system and want to make sure I would be able to wire it up to the stock head unit before I buy it. Is this possible and would I have to splice into the existing stock sub wire for sound or is there another place I could run my new sub wires?

thanks in advance for any advice!

 

yea you can add a sub all you need is a pac converter and heres a place that sells boxes for subs supercrewsound.com and audioenhancers.com

i have the audio enhancers box with 2 rockford fosgate P2 10's in it and it beats hope this helps

 

Thanks...all I am getting is a low-profile sub that is gonna sit under my passenger or driver side seat.

something like this.... http://www.crutchfield.com/p_777B8PT/Sound-Ordnance-B-8PT.html?search=sound+ordnance+powered+subs


Also, what is a pac converter?