That amp is a mono channel amp and is meant to power your subwoofers. I wouldn't recommend using it for your inside speakers. If you want a good amp for inside speakers, your going to need at least a 4 channel amp to replace your stock bose amp.
I'm selling one for dirt cheap here: FS: Soundstream Amps & Excelon Speakers
With four channels, you have each channel powering the following: Front Left, Front Right, Rear Left, and Rear Right. This way, you will retain your fade and balance controls and have ample power for each speaker.