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Here is one of the two extra Alpine Type-R subwoofers I have. Pulled it strait out of the factory sealed box, hooked it up free air, just to see what it can do. I was feeding it around 600-700 watts RMS continuous clean power from an Alpine MRD-M1005. It's hooked up @ 4 ohms, with the coils in series. There was a couple times I smelled it get warm, and it did bottom out VERY lightly, but there was no smoke, or damage at all. I did reach the thermal capacity if the coil, even under this extreme excursion, which cools the voice coils much more that it would if the woofer was loaded inside of an enclosure. The voice coil still looks like perfectly good shiney copper! I was impressed at the Spiders(Yes that's plural, there's two of them) strength holding back the power and controlling the throw. I believe the coil was leaving the magnetic gap at the very peak of it's travel as well because, even under extreme power it was not bottoming out of control. Very linear and solid subwoofers. Bang for the buck! THIS is how you break in subwoofers! Lol!
