Re: hifonics nemesis or soundstorm ssl ev2.1000
you'll need a lot more RMS power then that to damage your subs buddy. Plus if you set your gains right with a digital multi-meter, you wont damage your subs no matter how much your overpowering them. If anything, these cheap amps might not even give enough power to get the full effect out of the subs and you might end up turning up the gain or volume too much and end up clipping the amps.
seriously man just let your budget grow and get a decent 1k rms monoblock amp, take it from guys who've been through it and wasted their money going up in quality in small notches, you'll be wasting a lot more money then your saving.
09 Sienna Subs : Four Team Ascendant 18s......Sub amp: Two Taramps 15k
Headunit: Pioneer 80PRS................................Mids/Highs amp: CT 500.2 and Alphard 200.4
Front stage: Two PWX 10s per door midbass only....... PRV 6MR500 midrange....... Massive CT 2 german tweeters.
320 amp Singer alt....... 1 group 34 under the hood 6 group31 agms in the back 560 amp hours total.