What do I need to buy with the JBL?
To wire between your JBL 305P and your headphone amp, you'll need either:
- RCA (male) to RCA (male) cable (link) AND a RCA (female) to XLR (male) adapter (link).
- RCA (male) to XLR (male). (link)
The reason for this setup is because if you just wire RCA (male) to RCA (male) from headphone amp to speakers, you'll hear a constant LOUD *buzz* sound from your speakers, which indicate that it's a ground loop. I'm solving the problem by using a XLR on one end of the cable, hence my recommendation.
Note: the links are there for reference, feel free to choose any cable brand.