Just got one of these units. I'm waiting for an iphone cable to arrive, but meantime am listening to HQ audio over youtube and some free downloaded tracks from HD Tracks. The problem is, I don't hear any real difference on my iMac using Gradio SR80i. I'm comparing the Fiio over USB from the iMac...

Trying to get a sense of what kind of sound improvements I might achieve over my iPhone or iMac by getting a separate DA converter and/or amp. I tried the following test and wondered if it is a good way of establishing comparable sonic improvement you can get with a DA/Amp, or if I'm expecting...

Just got some SR80i (32 ohms) and connect them to an iPhone or an iMac (maybe 50/50 usage). I'm tempted to get a headphone amp and it looks like Fiio is a good brand in the under $200 cateogory.   Based on these considerations, would you recommend a particular amp?    At present, I've...