Amp into amp or just a new amp?
So here's the story. I installed my wife's car computer and I have a ton of noise. After some research I believe most of it is because the OEM car radio had a head unit connected to an amp with speaker level inputs. I am running a USB sound blaster with 3.5mm connectors kludged to the connector that plugs in where the head unit used to be. Now that I know that the amp wants to see speaker level inputs, it seems that I have two choices. I can get an amp with line level inputs and run the outputs of the sound blaster into that, then in-turn run the output to the stock amplifier using the stock connector(where the head unit was). Or I could just buy a new line level input amp and replace the stock amp. I know this seems like it would be the best choice, but here's the thing. By placing an amp between the car computer and the stock amp, I can utilize my connector to connect into the stock system and I'm done. But by replacing the stock amp, I will have to cut the stock connector off or run new lines or something, because I don't have that connector. Also, I believe the amp would be less expensive because I don't need that much power. Either way it sounds like I'm buying a new amp. I'm leaning toward placing an amp between the computer and the stock amp, due to the easier install.
Any hints or suggestions? I hope this was clear. Feel free to ask questions.
The car is a 1999 Toyota Solara. I don't know how much power the head unit put out or how much the stock amp puts out. All I know is it does NOT have shielded wires.