Mash - It sounds like you are "maxing out" your amp - that is VERY bad for your DJ speakers. Your amp lights should go into the red only once in a while - not all the time. If you keep doing that, YOU WILL BLOW YOUR SPEAKERS. You are pushing your amp too hard and it is distorting and that will destroy your speakers quickly if you haven't ruined them already.
It would be nice to know what brand and model your amp and speakers are.
If you want good sound stick with known name brands for your equipment. It may cost more money but it is worth it.
Good cheap amp (I have two):
http://www.zzounds.com/item--BEHEP2500
Good Cheap Speakers:
http://www.zzounds.com/item--JBLJRX115
or
http://www.zzounds.com/item--JBLJRX125
Of course there are lots of other great amps and speakers - watch out for "great deals" on e-bay or wherever - a lot of that DJ equipment is pure junk.