i had a single w0 in a 3cubic ft box ported at 44htz hittin a 133db in a thunderbird, and that was with an alpine v12 mrv-t407 amp, which is 150.1 bridged, i think i wouldent put any more than 200 watts to one of those.
well it depends on the size... my old 10's are 125 watts rms a piece an i had a jbl 600.1 runiin all three of them an the amp was at full power an they never gave me ne problems an i sold them about 2 months ago an they were around 6 months old...but if its a 12 i would put right at 200 watts to it at max an a 10 i would recomend 150 an if its bigger than a 10 i still wouldnt go much over 200....wut size do u have?