I have commented before on this, but when there are over 2,500 posts in this thread, I feel obligated to steer people away from the Singxer SA-1 headphone amplifier for driving HiFiMan HE6se v2 headphones. Out of my
large collection of amplifiers, the Singxer SA-1 falls into the category of
not good enough when driving HiFiMan HE6se v2. It does not sound good compared to some of my other amplifiers that do sound amazing when driving HE6se V2.
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My Singxer SA-1 does get almost daily use these days since my Singxer SA-1 is part of my office desk headphone rig regardless of it's
relatively poor synergies pairing with my planar magnetic headphones of my collection. Why? Because the SA-1 is a
good preamp for my Emotiva Monitors and subwoofer, that can operate
cooler than my Schiit Jotunheim 2, HeadAmp GS-X Mini etc... I often leave my SA-1 powered on 24 hours a day and I don't have a concern for the heat.
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While I much prefer my other headphone amplifiers over the Singxer SA-1. There are a small number of headphones that do pair well with the Singxer SA-1. some planars such as Audeze LCD-XC, and Monoprice M1570 do well pairing with SA-1. My Beyerdynamic and Sennheiser headphones pair well, but I have so many tube amplifiers that I usually use for them instead. The unique budget Monoprice AMT also pairs well with the SA-1.
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So, I have to jump in this thread every once in a while to make the above statements. Mainly, I don't want anyone purchasing the Singxer SA-1 and wasting their money thinking that they would have end game pairing it with HiFiMan HE6se v2 headphones. It would likely be too much of a disappointment and money wasted when considering pairing with the HiFiMan HE6se v2 .