The Alpine Type-R have a pretty low sensitivity at around 87db. They will not sound good without the proper amplification. Last years required 75 watts RMS and this years require 110 watts RMS. I'll be feeding mine 100X2 RMS or more depending on incoming voltage.

Alpine designed the Type-S around the concept of replacing factory speakers that are powered by either a factory or aftermarket headunit. They have a much higher sensitivity at 92db I believe. They'll sound much better.

Tedmond, as an MECP installer you should have known this. Factory or aftermarket headunit amplification is far from sufficient for the Type-R line.