I have a Soundstream Tarantula 2-channel 880watt amplifier, and I am in a debate with myself over several different types of Subwoofers. Since the tarantula cant be run on 6 ohms...I think..... I took about the JL w6's that I really wanted. A audio dealer told me they work the best under 6 ohms and 4 ohms just doesnt sound as good. So its either 2 12" MTX thunder8000s or 2 12" Alpine Type R 1241Ds. If you have any other recommendations for subwoofers please respond. Any advice at all would be helpful.