Adding an amp and sub to a J30 Bose

[lenrobbins]

I know this subject has been discussed a bit in this forum but I'd like to get down to specifics. What I want to do is keep the entire OEM Bose system (head unit and powered speakers) but install an amp for a sub. I understand that a converter is needed between the head unit and the amp. How is the converter connected to a head unit that doesn't have any outputs? Is this where everything gets powered (converter and amp)? How can the Bose head unit control the sub? I can get an Alpine amp that has 40 watts at 2 ohms with 2 subs and 150W at 1ohm bridged for about $200 bucks with some good subs. Would this give me enough bass with the sub enclosure in the trunk? Sorry about the length of the questions but I really do not know diddly about this subject.

Thanks for any responses,

Len

[Rex]

Scroll down most of the way in this thread and look for the info from Simmsled. Wes is in the process of doing the same thing.