Greetings,   I just ordered the Schiit Magni headphone amp for my Beyer DT 880 headphones but I need an RCA cable to use them.    I really don't know much about RCA cables and since I do not have an external dac I will just need to plug the Magni directly into my computer with a 1/8" plug...

For the last few months I have been using DT 880 pro headphones and I use them while listing to music off my mac book pro and recording guitar through my scarlett 2i2 audio interface.   I really don't know much about headphone amplifiers and I do not want to spend more than $200.   Right now...