Simple setup.. I use a small form PC to play a white noise mp3 file loop but the problem is I don't know if its the cheap amp I am using, the speaker wire, or the speaker but there are cracking and distortions in the sound. When I use earbuds I don't notice it. What type of speaker would work best for say a ambient waterfall sound to run 24/7? Also what gauge cable should use? Using 16 now.
It's possible that the cracking and distortions are actually digital clipping or artifacts in the mp3 loop. Remember mp3 is a lossy format which means that the encoder is looking for patterns and for sounds that can be masked by other sounds within the same frame. Psychoacoustics is very important in being able to compress audio.
White Noise is entirely random. There are - by definition - no patterns to be had. Therefore, mp3 is really not the the best solution to store this type of audio. I would recommend something non-lossy - WAV, or FLAC.
There isn't much bass in the sound of running water, so you would probably get away with a decent mid-range and tweeter. You won't need much below 250Hz