My three Ray Samuels amps, my two Headamp amps and all of my tube amps are all single ended output only and yet each of these amps sound amazing when paired with the right headphone. So these amps have been designed to perform well out of the TRS 1/4 headphone jack. Amps that have both balanced output and single ended are usually designed with more power output on balanced output over single ended. Otherwise buyers of those amps would be going on forums complaining that the single ended output being better and justification of charging more for extra circuitry would be illogical. So, of course amp designers make certain that the balanced output is either the same or more powerful. So, my guess is that it will sound better out of the balanced output of the Liquid Platinum. I have not listened with the Liquid Platinum yet but I have read much praise on how well it performs.
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Each of my headphones sounds different and performs best with different amplifiers. My two overall best performing amps with the Monoprice M1570 are the Ray Samuels XP-7$700 and the Singxer SA-1 $540. As stated earlier, the Ray Samuels is single ended output only. Singxer SA-1 balanced XLR output performs much better than Singxer SA-1 single ended output.
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I do want to make it clear that even though I have found my best two performing amps, the quality of sound out of other similarly priced amps is still VERY good and not a huge leap in performance with the Monoprice M1570. On top of this, there are different preferences of what sounds good to each person. So, I would NOT condone anyone to make a SIDE-GRADE to one of my amps if they already have something in the same league such as a Schiit Jotunheim which also performs admirably with the Monoprice M1570 and may even sound better with some music. I A/B test my amplifiers side by side and can hear my subjective preferences. However, if I were to listen to either one and switch to the other the next day, I would not hear a major difference and the enjoyment from the music would be identical from such close performing amplifiers when paired with the Monoprice M1570.