So they were having a mojo side by side with the q5 and letting people compare with same tracks. ? That must be an amazing move by FiiO or the modder.Not owned, but heard them in our numerous meets with other head-fiers. Headphones tried were Senn 650, HE4XX, HE500 and a lot of iems too. The mod is swapping the stock Opamps with a OPA2156 in the gain stage of the amp and filter stage of the DAC. Needs some practise with soldering and stuff.