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Can someone please explain to me how on all of my husband's audio equipment (Arcam amp, Arcam irDAC and KEF speakers) there is a red and white RCA input and red and white RCA output. Why are there 2 red for the input and 2 white for the output? If going from a DAC into the headphone amp, how do you connect it if using standard red and white RCA cables? Or does it matter as long as you connect right to right and left to left?
I'm not sure if I totally understand your question but i can tell you how to connect those. RCA color doesn't matter, they're just there to identify left & right channels. As long as you feed the left & right channels correctly from your dac to amp it should be fine. If you connect them wrong just left/right's going to be swapped, that's it.
I think the RCA connections on this amp have the same color for inputs (red) and outputs (white). You are correct that normally the connectors are one red and one white each; I was also confused by this. For this amp, you would connect both of your RCA cables to the red inputs; just be sure to match right and left to the right and left of your DAC.
Oh yeah, just now noticed it. That's confusing.
Thank you for confirming this.