South American rainforest. If for some reason you don't know what the largest rainforest in the world is called, you can Google it. You should be able to work it out from that, at least I hope so.
If not, then............
Just wondering though if naming that what should not be named, really matters in this instance? If we were talking PC parts, then certainly competitors should not be named, or risk facing fire and brimstone.
This discussion is about headphones, which is not part of OcUK's core business. If they also sold these Klipsch headphones, then it would make sense not to name competitors, but they don't, so.......