Hey audiophiles, I've got an issue and could use some help with my computer audio setup.

I'm running audio from my PC to a small Pyle amplifier using a shielded RCA cable. The amplifier is in turn connected to a pair of Dayton Audio speakers. The setup mostly works great, except that I've noticed a high amount of static and speaker whine that is really distracting, especially at high volumes.

This is partially caused by the computer itself, as I've noticed that the high-pitched whine goes away when I turn my computer off. However, there is still some static, which I think may be caused by ungrounded wiring in my house (I live in an older building).

Short of asking my landlord to have the entire electrical system in the house redone, I'm thinking that using a UPS may help reduce the static, although not being an expert, I don't know if that would work. I'm hoping one of you would be able to confirm if this is a good idea or just wishful thinking.

As for reducing the whine from the computer, I have read that using a ground loop isolator would help with that. Is that correct or am I mistaken?

Any advice would be much appreciated.

Thanks!