my advice would be to sell that amp on craigslist and buy from a manufacturer that is more reputable ... you can find great equipment on various car audio forums for very reasonable prices, also might want to check out circuit city and see if anything worth a shit is left

other general tidbits/advice

- Set a budget and stick to it - just like anything if you don't watch yourself it can get out of hand quick

- Determine what music genre you listen to most and build to suit it

- Install plays a larger role in overall quality more than equipment - $400 driver in a $2 k-mart prefab box = crap

- Use quality equipment - keep in mind quality does not mean high-dollar

- Research how to tune your amp properly - even with quality equipment and a solid install if your gains and/or filters are not set accordingly it will sound like ass and possibly cause you to have an urge to eat babies or something ... or so I hear