Hello, I have a home built intel PC with dual 2.4 gig procs, and it works well, but I want to see if I can hook it up to a really old but functional amplifier. Can this be done and how please? The amp is a kenwood solid state stereo tuner amplifier with several inputs and outputs, its max output is only 90 watts... and works at 50-60 hrtz? The reason I want to use this is I have several systems and want some music that I can run to various rooms, and have a lot of old speakers that would work with this amp... just not sure of the crossover etc.. amnd don't want to blow either unit?? All help is highly appreciated thank you..

Hi, basically all you need to do is run a wire (shielded, Not just 'lamp cord' or twisted pair) from your Sound Card "Line Out" to the "Line In" on your amp / tuner-receiver. Your Sound Card should be the 1/8" Stereo Jack - so either build a cable for this (if you're good with small-component soldering) or purchase one at Radio Shack. I really don't know if they have one, I build all my own wiring. You'll be needing a cable that has a 1/8" Stereo Male Plug on one end and Two RCA-type Male Plugs on the other end (each one feeding a separate Left & Right signal to your amps inputs. If you can't find one, I can give you instructions on building your own - which is nice since you can make it whatever length suits your needs. Let me know how this goes for you.
Good Luck!. and hope this helps...
Dave

By the way, there are no issues regarding 'crossovers' or Hz in relation to your question. This is simply 'line level' signals between the computer and your amp / receiver. Just be aware of impedance levels when connecting the speakers to the amp.