[jdavia]

Don't under rate this Amplifier-mixer. I puts out 2x400 watts. that is 400 watts per channel, either in Stereo or Mono. at 4 ohms, not the specks that were mentioned in another post. 400 watts per channel is a lot more power than my 300 watts per channel, and mine is loud.
The way the power is rated today is by the amount of amps used to power the whole amplifier, not the amount it uses to power only the final stage of the amplifier as was the old method. Therefore you get more rated sound amplification from the total watts used, but actually less sound.in loudness.

There has been a lot of suggestions including some of mine, and I suppose the originator of this thread xxyzz has become more confused and don't know where to turn to solve the problem. We might have made more for him.
I can only add now that if the equipment is all in good working order and hooked up properly, when turned on and adjusted properly it should give satisfactory factory results.
One moe thought:
Maybe it has something to do with the way you imported the songs to your computer that you have a volume loss. More to ponder about.