The of the NX4 price is more than the Fiio+balanced cables on Amazon.
Amir’s comparison wasn’t fair really: Amir did not test the Fiio’s balanced ability! Balanced power is way higher and what it’s designed for. I use it for my 400i headphones and there’s plenty of power. The non-balanced feature is admittedly low powered and even lower than then the Q1 mk1! So this device is really made for balanced connections. (Balanced doesn’t normally improve quality, but it can boost power, and does here.)
A fairer comparison -- especially if using inefficient headphones - - would be to measure NX4’s high gain vs FIIO’s balanced and this is where I get my claim that the Fiio probably measures better:
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