About RMS power out put and RMS frequency.

 

i want a Alpine CDA-9813 head unit, http://www.crutchfield.com/cgi-bin/ProdView.asp?a=0&s=0&cc=01&g=300&id=features_and_specs&i=500CDA9813.

i also want CDT HD-62CF speakers, http://thezeb.com/caraudio/CDT_Audio_Components.html. the CDTs have 130 watt RMS frequency and the alpine head unit has 27 watt RMS power output. i don't understand why has 27 and the speakers have 130, that is a 103 difference. do these stats have any thing to do with eachother? also, could you take a look at both on the sites i gave and tell me if u think they are a good match?

Thank You
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