Alpine SWE-815 Active subwoofer question?

[LEOopasni2709]

Hi guys, I recently bought Alpine SWE-815 active subwoofer and it sound very nice and clean for small 8". I am not the guy that constantly listens to loud music and wants to shake the car to pieces with bass but in maybe 1 out of 100 songs I want to crank it up a bit. My headunit is Pioneer DEH-S4000BT with MOSFET 4x50W, my front Pioneer TS-G130C and rear Pioneer TS-G1720F speakers are both rated at 40W nominal, and subwoofer is rated at 100W nominal (amplifier for the sub is 150W). I already set the HPF at front at 200Hz -24, and rear at 160Hz -24 and it sound nice even at high volumes. When i turn the radio up to 45-50 (63 is max volume) and set the gain to about 70% on sub, on the certain track it does not distort the sound and I do not believe it is clipping but my concern is when I look at the sub it looks like it is doing heavy work. My question is how far can this subwoofer go without damaging anything?

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