Just a little bit of info for anybody that wants to know, I'm a newbie and not many people gave me any help when i asked about this so i just did what i thought would help. I installed a new headunit and new infinity kappa speakers ALL the way around and afterwards it didnt even stand up to the factory system. So i ask around but nobody helps, eventually i just say to hell with it and i bypass this dumb little factory amp....and what was the outcome? It sounds sooo much better than it ever has before. If anybody else has a system that doesnt sound too good, you may want to try bypassing a factory amp...if it has one. One question tho, would dynamat improve the bass substantially?