808 bass, it's basically just a sine wav with selective distortion, only thing I could personally suggest is either learn to make your own or download a Lex Luger/Zaytoven kit
he recorded the audio using a video recorder.. obviously the audio quality isn't going to be great, but i bet on his computer this could shake the windows in his house on high volume.
imho, this sounds better cuz it hits better on my system... you can tell the one bass note is off but hits better for the less dollar sound systems.. still like parts better of original too, great job