The new 'S' handle 80 rms ,240 peakThey also have a deeper bass response.The tweeter on the new 'S' co/ax only goes to 22k hz.The 's' units before these, the tweeters went to 30khz.Even though they only take 50 rms/w peak of 250 they had a much cleaner sparkle on the high end than the new ones.The cap. on the side of the new 'S' looks like a barrel bomb!I reccomend that all "S' and "R" co-ax speakers be run off a basic 50 rms 4-channel minimum to hear how nice they can sound.I have heard the 'S' without amplification,just "deck power",not worth listening to really.I used "S' speakers ,components,co-ax's withe the f-450 and the F550 4 channel amps before I went PDX and Type 'R".I ran the new 12W3-3-4's with the V-Power amps--F550 4 channel and 850-M mono-D class to run the W3's.All in all...They have a deeper sound than last years model...Alpine50---------------