I use these cables to connect two of my PCs to my home theater audio system associate. Computers are minijack oriented and the preamp is RCA oriented so I have to convert the minijack to RCA to connect to my preamp. A preamp is a receiver but without the power outputs or cables going to the speakers. The preamp output is a series of RCA connectors where the RCA cables connect (in my case) to the power amplifiers, which in turn connect to the speakers with speaker cables.
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