I need some advise ! (average salary for assistant)

If you feel like you are deserving of a review and a raise (and essentially more responsibility) you should just ask. The worst case scenario is they say no or the budget just isn't there. But if you are worth it you definitely should ask.

You could also entertain the idea of approaching another company and asking for X amount of dollars and if it's enough to make you jump ship then off you go.

I personally like building working relationships with the people i work with (even the ones i don't care for so much) more than money. I care more about putting out a quality product and my name being associated with it than I do about money.... unless the money is really pathetic and I can't support my family on it of course.. but this value is different to everyone.

So in short. Just ask. What's it going to hurt?

EDIT: Additionally, if you do not get what you are looking for make sure you ask what you could be doing additionally or differently to get what you are looking for.

This terminology is new to me, as an employer I'm curious as to it's meaning. Is it an installer, 2nd tier installer, designer, programmer? I'm not being sarcastic, I'm truly curious as if it's a term with national meaning, maybe I need to change my phraseology when advertising for help.

The March 2012 issue of"CE Pro" magazine has an article on their wage and salary survey. The entry level jobs were about $27,000 to $30,000. But like most salary survey's, they are seldom accurate.