I'm guessing you didnt bother looking at the numbers nor pricing. The md 1800.1 is around 162 + shipping. The soundstream is 175$ however the taramps makes 500 watts more and is WAAAAAAAAAAAAAAAAAAAAAAAY more efficient than that cheapo chinese garbage. Meaning, to even get any actual power out of of that soundstream, you need a beefed up electrical setup, otherwise if you hold around 13.0 volts after drop, you'll be lucky to make any sort of power meanwhile the taramps rated at 12.6 volts, you'll get the 1800 rms even with a sh*t electrical system and even more when your electrical system is beefy.. Now a new taramps md 3000.1 is 200 dollars and based on those dyno videos, you can pretty much gauge how much power you'll have. Plus you'll save on the size as well. full bridged amps dont need to be massive to generate ridiculous power.