Holy Sh**!!! The sound on this thing!
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Crazy how much better the bass holds together on the he6, isnât it?
I actually had to return my HE6 to Hifiman because the right driver was touching the magnets, i will only be able to audition the HE6 in a month or so 
But man what these did to my LCD-X is insane! The bass is much stronger, hits harder and is more controlled, also the soundstage is just different! It is not wider i donât think, but it is more immersive somehowâŚ
I have these for only one hour but the difference is not something i need to A/B at all! It is clear and easy to notice.
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Hp-2? I heard mine on the little brother playmate 2.
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Itâs the control. It makes the echo and reverb sounds that give you a sense of space way more accurate.
Shitty to hear about the he6. I wish hifiman could get their quality control sorted out. If you ever want to try one out again, I have a couple in reserve and if you give me shipping Iâll send one out to you to sit on for as long as you need to feel like youâve heard what it has to offer.
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My first impressions with the HP-2 are that the biggest jump in sound quality in general was from the Asgard 3 to the Drop 789, the synergy was incredible then. With the Soloist i think that same synergy is present but not a lot more except from the soundstage, that same effect i heard on the soundstage on the LCD-X is present in the HP-2 but more amplified because of the HP-2âs nature.
The difference for the LCD-X was night/day but for the HP-2 is mostly concentrated in the soundstage.
Maybe that means that the HP-2 does not scale as well as the LCD-X? Not sure⌠The upgrade blew my mind for the LCD-X but not for the HP-2.
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Thanks man, that is very generous of you! But i actually returned the HE6 so they can send me a replacement 
Apparently it will arrive in NY on the 19th that is why i think it will take about 1 month for me to have a new pair.
I wonât lie, i will probably not sleep right at nights until i hear the freaking HE6 with this amp! lol
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Itâs almost the reverse with the hp-2. No matter how crappy the source, it makes it sing.
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Yep, the HP-2 sound good everywhere i plug it! It is not picky at all. The soundstage was a worthy upgrade with this amp though, i am not a âsoundstage headâ so it is not as important to me, but it is still very cool.
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Itâs weird the LCD-X isnât all that hungry for power but scales really well. The he6 scales insanely well too as do most planars but some just donât care and do what they do no matter what theyâre plugged into.
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Yep the LCD-X is super easy to drive, i was surprised it scaled so well with this amp. There is the synergy factor as well, i just know it sounds awesome!
Only one issue though, on mid gain i can hear some noise which i never did on other amps at mid gain. I may need to use low gain for the X.
Yeah that noise is completely gone with the supercharger and also if you have some dynamic driver headphones I wouldnât recommend the balanced plug, itâs usually too much power and you get hum from it.
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Another reason the get the supercharger then.
Damn this thing runs hot, it will not catch on fire or anything like that, right? 
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I mean I sure as hell hope not. But yeah itâs a great hand warmer station after you come in from the cold lol.
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Can you test if it is noise floor free on the zen in low gain? On both plugs?
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Yes, the U2 Pro works a treat. The Wyrd 4 Sound Reclocker also works well, but I think I like the U2 Pro a bit better.
i ended up getting the highest tier upgraded u2 pro (cmd-17) and itâs a slight step up but not really worth the extra $100 and it has the crystek femtosecond clocks like a lot of pretty spendy DDCs. i cant switch into atmos with it though because atmos sets the bitrate to 24/48 and for some reason it only plays out of the right side like it doesnât have the clocks for 48khz. kinda irritating.
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Just tested, the noise floor is there even in low gain but i could only tell it was there by connecting and disconnecting the IEM a few times, it is barely perceptible and does not bother me at all.
I must say that the Soloist is an awesome pairing with the Zen, it takes it bass to the next level comparing to the other amps i tested it with.
But yep looks like the noise floor is an issue with the Soloist for both sensitive IEMs and headphones. I the super charger really solves the problem it is a worthy investment because this amp has such an amazing sound i donât see myself ever switching amps again.
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Playmate 2 was the same. If you get the supercharger and still have the Zen, please try again! 
Even subtle noise floors can bother me. For some music it destroys the dynamic range.
I use IEMs a lot and my desktop amp really needs to deal with them. iDSD micro signature is still winning this battle. And that made the zen come alive as well.
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How do you guys connect this U2 Pro to the DAC? SPDIF?