Is there a sound card which is amplified 5.1 channels and will accept digital in from a stand alone DVD player. I have a PC, speakers and sub. I want to find an amplified sound card which I can drive these speakers with, I do not have a home theater amp and would like to use a sound card to acheive the same thing.
However, why don't you just put a DVD-Rom drive in your PC? Most newer computers have 5.1 audio cards built in these days. Also with the internal dvd drive you can save money by not buying such an expensive (read: Audigy 2 platinum) sound card that accepts optical in. All you have to do is output the sound using a less expensive soundblaster product like this one: http://us.creative.com/products/product.asp?category=1&subcategory=206&product=5 0
Did you read the tech specs on the cards? That is why I gave you the links. They have some amplification, but very little. Even dell ships a power supply for their smallest computer speakers--they are amplified. I can't imagine the setup you have now as being unamplified if they're computer speakers. If they are HT speakers NO sound card will drive them, even if it is an amplified. You need to buy a receiver.
There are not Pc soundcards with a built in amplifier. The Creative X-Fi can handle basic Preamp and receiver functions but there is simply no space inside computer case for speaker amps.