I'm curious if you'd try it just for grins and giggles. I find it hard to imagine that the extra power from the balanced LC will not make the HD650 sound SIGNIFICANTLY better than just using the Mojo alone. The amp section on the Hugo is nothing to write home about and I think the Mojo uses the same setup.
Will do - only must state up front that work schedule has kept me busy. I have barely had time to login and keep up with Head-Fi. The soonest I will be back to significant listening is after next week.
Just to keep the facts straight there is no 'amp section' in the Hugo/Mojo. It's the discrete analogue output of the DAC. The Mojo is essentially full time variable line-out and there is no traditional amp section. If you don't like the 'amp' you are directly saying you don't like the DACs analogue output. You can't separate the two. Rob Watts has posted extensively on this.
Sorry for the OT.
No worries - not OT as it relates to the original question of Mojo. However when I consider the line-output from the Mojo, I am also considering how it interacts with standard external amplifiers. Most line outputs have very high impedance values, to better interact with an external pre-amp or amplifier. High impedance means it sends voltage and not much current, right - I forget? But due to the low impedance value, I think I will likely still prefer its sound directly connected to my headphones versus sending it through an external amplifier.
If I recall correctly, when trying this on the demo of the Carbon, the sound just did not seem as clear to me as it did directly from the Mojo. It was as-if I were listening to a lesser DAC, versus the detailed sound of the DAC I heard when connected directly to Mojo. This was with the demo, and I did not connect to my final version of the Liquid Carbon (having just completed burn-in before work schedule picked up).
If you have an amplifier that is specifically matched to a low impedance input source, that would likely provide a different scenario. But I suspect most amplifiers, the Liquid Carbon included, expect their source to have a high impedance characteristic. I'll let you know in about a week and a half.