ang S12L5 ratings: 50-600watts RMS. so if you feed it with 600 w RMS, medyo maxed out na sya.

http://www.crutchfield.com/cgi-bin/S-cptCDYOFdzJ/ProdView.asp?s=0&c=10&g=67700&I=2062S1 2L5&o=m&a=0&cc=01