When I chatted with the folks from crutchfield, they told me that the Infinity amp was designed for 2 ohm speakers. Unless you bypass this amp, you will lose power by using something other than a 2 ohm speaker. I was going to just refresh my speakers and use the stock set up to power it but now I think it will make more sense to replace the amp, head unit and all speakers. I will prob end up with better sound for less money and less hassle than trying to follow suit with the 2 ohm set up. Infinity is the only company that makes 2 ohm speakers (according to crutchfield) and the replacements look like what is in my car already. Im going to have to scrap the whole system and start a new!