I have a JL HD900 amplifier driving my 13TW5 at 500 watts RMS and it rocks! Make sure your enclosure is sealed VERY well. The slightest air leak will dramatically reduce output and sound quality. When I first got it, It was ok but not what I was hoping for. I took my box out and I was inspecting the driver and pushing on it and I could hear air excaping. I sealed inside and all of the outside edges and seams with fiberglass. Back together and cone test. Ahh Sealed! I started playing it and I was floored! Not only was the bass crushingly low but the sub was crisp and tight. It sounded great! I am now adding some more insulation behind the panels and area around the box.
Long story short - 500W will do the job. I would not push this sub much past that, especially a JL HD amp. Any more power would simply exceed its mechanical limits.
This sub is very loud! and it kicks like a mule!
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