Hey, I bought a Fiio A3 on a whim (gift vouchers) a while back. I'm using it with my iPhone 6 and the bass boost seems to have a little effect, but otherwise the main benefit is volume beyond what I actually require. (I'm using AiAiAI TMA-2 headphones) Am I correct in thinking that without a DAC, it's literally a total waste? Is there any benefit to using a Fiio A3 with an iPhone 6, whatsoever? Or, can I get benefits by using a cable, like a Fiio i1? Thanks!