Quote:

...Through my Pa and live they sound full and well mixed. However, I have found a need for demo's to help market. On a low end sound system they loose all there fullness
and the mix changes.
I was simply looking for an explanation and any help anyone might offer.
I now believe that in order to make my existing or new files sound good on different audio systems I will need to master them.
I was simply ignorant of the fact that you had to do more than mix.



OK, the act of getting a mix to sound good on various systems is the job of the mixer. You need to mix it so it "translates" well on other systems (low and high end and in the middle!) BEFORE you worry about mastering.

As I stated in other thread that got lost, between your room and your PA you are being fooled. The good news is that if it sounds good to you there, then you know how to get a good sound. You just need room treatment, best room arrangement and good mixing monitors to hear what is really going on. If you can't afford all that, get some decent headphones and try mixing that way.

Now at bandcamp: Crows Say Vee-Eh @ bandcamp or soundcloud: Kevin @ soundcloud