Let me get this straight, your uncle had a 900 watt amplifier powering a pair of speakers with a maximum wattage rating of 300 watts?

Its hard to help when you don't answer the questions asked. Stating the wattage doesn't help, brand and models do. What was your uncle using that made these speakers sing? What are you using? Eight years ago, when these speakers came out, manufactureers lied about true wattage on their amps under normal conditions. It doesn't take a lot of wattage to make a speaker sound great, just a good quality amp and processor. And of course the speakers need to be good.