I agree what Mr Peabody says above that you cannot improve on the signal quality only degrade it. Just like computers grabage in equals garbage out. If it doesn't have pre amp outputs maybe you could cheat by using a line level adapter that is available in car audio. These are used to adjust the speaker line outputs down to a level that an amplifier can use. Search the internet maybe you can find some simple plans, try ESP Elliot Sound Products it is free, good site.

The importance of a good source is overlooked by many people, I used to think that the most and only important piece was the speakers but I have changed my thinking. Speakers are first and foremost but the source is the second most important component that you buy.

Only wish that most things in life where cheaper so that more of us can enjoy the fruits .of life. I guess that whats seperates your average worker and the rich. First you need the money and then the desire to spend it to appease your ears. Mosty people are quite happy with a basic stereo, power to them. But for myself I want to hear that the band is playing in my room.