Thank you. I listen to music and I currently use a pair of Apple HomePod Minis, but I know I can do better than that. My headphone system is not at my desk.
The dogs face says ādonāt look at me, Iām not tidying it upā 
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I did not compare it to any other amps. At the time I did a lot of reading and researching of forums etc and I plumped for the Niimbus after taking it on trial.
For me it is a tremenous pairing and I am not one for changing my gear a lot so it will be with me for a long time
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Primary headphones - Utopia OG, 1266 TC, Atrium, VC
Current primary chain - Qobuz ā Roon ā iFi Zen Streamer (Coax BNC) ā Holo May KTE ā EC Studio B (Elrog 300B Mo, NOS metal base Mullard GZ 34, NOS Tung Sol 2C51) ā CFA3 (all Wired world silver RCA)
May ā CFA3 (nordost blue heaven XLR)
Currently running May from Zen streamer with Roonās upsampling (2x,4x) because my PC is in a different room but will try HQP next year once I move.
Mostly using CFA3 for 1266 and it sounds pretty kickass , especially with Studio B as preamp. Rest of the headphones sound great out of Studio B directly. Pretty happy with this setup 
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How are the Cayin and the Holo working together, is it a good match?
I have the Holo Spring 3 and I am really considering getting the Cayin HA MKII. I have another Cayin tube (CA-55a) amp and it is so great for such a low price.
Do you mean the Cayin HA-1A MKII or the HA-3A? I own both but for the Spring 3 I would mostly recommend the HA-3A with upgraded tubes to be able to appreciate what the Spring 3 can do. Iād only choose the HA-1A MKII if you have some very hard to drive planars (my Arya V2 sounded beautiful with it). Otherwise the HA-3A would be my pick. Better technicalities, resolution, lower noise floor, better design (imo) etcā¦ Less power hungry planars like my D8000 sound so much better on the HA-3A compared to the HA-1A MKII. If you have an further questions, just let me know.
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Hifiman Susvara
Focal Clear OG
OPPO Ha-1 and PM-1 (Planar HP)
Ferrum Oor / Hypsos
Panamax 5300-pm
Little Bear XLR Switch with Worldās best Cables (XLR x 8)
Hifi Rose 150b
Output āFrontierā audio monitors
Fiio m17 DAP
UM Mest MK 2 IEM
CocoPar portable 17 in monitor
Ipad 12.9 (Hifi Rose 150b remote)
SoundRise Pro 9 speaker stands
Not pictured:
Hiby R6 2020 Dap/Dac/IEM amplifier
Shure 846se IEM
BeoPlay H6 (closed back HP)
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I was actually thinking of the HA-300B MKII, but I can see it was the HA-3A you have pictured. I just got so exited than someone here had gotten the 300B MKII 
Thanks for the remarks, it is good to know your insights and I guess the 3A is more similar to the 300B MKII, so you got me thinking.
But I really like the Cayin tube sound, so nice to hear from another Cayin owner!
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I just got my HA-3A tonight. This amp does not get enough attention! Granted I am only into it for a few hours, but this thing is phenomenal!! I absolutely love it. Bass, stage, air, dynamics, itās all there. Plus itās gorgeous to look at and built like a tank.
So far Iāve briefly had the LCD-x('22), Aeolus, and Clears plugged in; even the HE6seV2ās-which initially sounded just fine, I was expecting a desktop crash into a singularity and potential neighborhood destruction.
The ability to switch impedance is epic when youāve got too many headphones you like. This is a great partner amp to my FA10 and may push my Hagerman Tuba into another room. So far I simply couldnāt be more pleased!!
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Finally got a chance to sort my setup today and get the Envy situated. Good god, I love this amp!!! Really feel like Iām getting the most out of my Susvara now.
Rearranged everything and removed three amps (I think I will be letting them go when I get time to take pics and post emā) the THX887, Violectric V280 and Xduuo TA-20.
Just need to recoup from my spending spree and Iāll add the May next year. I think then I should be contentā¦ish 
Iāll be all set, apart from some cable upgrades, a nucleus, maybe a couple more cans, power conditionerā¦.yeah itāll never end haha!!
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Very nice and clean setup! Love the Elrogs 
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Thanks. Yeah, the Elrogs are incredible! Canāt keep them out long enough to get the WEās burned in. Hard not to just listen to them all the time.
Grats on the beautiful setup! I know itās apples to oranges but any thoughts regarding the susvaras on the envy vs the folkvangr? Iām surprised how quiet the envy page has gotten.
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Love it, great setup!
All I can say is, it fills me with (rimshot)
Envy!
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Thank you!
Yeah, it really is. The Folkvangr canāt really run the Susvara properlyā¦. not a good combo at all Imo. Not nearly enough oomph. The Sus sounds better from both my V280 and THX887.
Generally speaking, everything sounds good on the Envy so farā¦ Though I havenāt tried all my headphones on it yet and thereās a lot of variance to be had in tube rolling.
The HD800S is more in the Folkvangrās wheelhouse.
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I second that !! I havenāt heard one yet but itās a beauty!
Congrats!!