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True enough. However, a line out converter simply reduces the amount of speaker level signal, which includes any distortion from the original head unit amplifiers.
Pre-outs take the source signal before the head unit amplification stage.
My question is, will the distortion from the stock radio amplifiers be amplified again by the aftermarket amp to the point where it is noticable? In other words, would an SI radio plugged into the pre-out inputs of an aftermarket amplifier sound noticably better than the LX radio plugged into the speaker level inputs of the same aftermarket amplifier?
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