If I unhook the oem subwoofer (base B&O) from the amp is it likely to mess with the amp? The plan is to remove the oem subwoofer and replace it with a powered sub with a little more poop!

 

I doubt it will mess with it, but there is no need to unhook it. I added an under-seat box to mine with two 12's. I just left the OEM sub connected.

 

Ya well the under seat area is already kinda busy, tools and stuff!

 

Even one of the behind-the-seat enclosures will not affect it in any way. You can leave it plugged in.

 

no room behind the seat without moving something. Found a under seat cerwin-vega that would fit nicely where the stock sub sits now.

 

Are you pulling power for it from the battery?

 

In the case of the OP, he is using the under-seat space for tools and what not, so it may not be an viable option for him. In my case, I removed the lockable under-seat box my truck came with to make space for the box. However, I do not need the space based on how I used my truck.

 

No it will mot affect it. I removed my stock sub and added two under the seat subs.

 

yes it will be a powered sub, I'll run a separate fused line from battery and ground to a body lug near existing amp.

 

Thanks!