I've seen the SSA forum's test on them, but that was with not to beefy of a electrical. The voltage always drops to like 12.5 volts. I know it's amp specific, but I want to try to find out how much they will put out. My electrical will be a batcap 3000, batcap 2000 (maybe 2), 2 runs of 0 gauge for power and ground, and a 250a h/o alt. I think my nine.1 might put out just as much power as the sundown. I'm just seeing if it would be worth it to buy a sundown.