I've bought the AVA250 subwoofer amp, and I'm waiting for my backordered Tempest driver to arrive. I'm wondering what advantage or disadvantage there would be to wire both voice coils of the sub at 4 ohms versus wiring only 1 coil at 8 ohms. It seems to me that the 4 ohm arrangement at 250 watts would be far superior to 8 ohms at 150 watts. Am I missing something obvious, or do I just have too much time on my hands? Thanks for any comments.