I do not think I have ever run across a 2+1 amp. Plenty of 5 channels, which, if I were buying one for this car, I would go with, and even some 6 and 7 channels...

I am currently running a second set of infiniti components, but both sets are still running off the aftermarket HU I installed. I have a 4 channel amp and 2 one farad caps to install, but no where to put them