FIIO K11/K11 R2R, Truly Balanced, Truly Brilliant! Desktop DAC and Headphone Amplifier
Oct 10, 2024 at 4:29 AM Post #766 of 956
Check it out. Killer DAC system FiiO K11 R2R (+ Aune XP2 LPSU) & FiiO SR11 (+ BRZHiFi LPSU) in NOS mode, fixed line output to Saba 760 Stereo tube receiver (1968. ITT-Lorenz ECLL-800 output tetrodes). USB C-C connection, UAC 2 mode, plays files located in NAS via DLNA (v174 firmware for SR11 streamer). Bubble UPNP app for Android.

Female vocal:



Male vocal:


Instrumental:



Bye Bye Denafrips Venus 😄

The Aune supply delivers 9v 1.5A, the K11 has an external 12V supply. No issues?
 
Oct 10, 2024 at 4:41 AM Post #767 of 956
Check it out. Killer DAC system FiiO K11 R2R (+ Aune XP2 LPSU) & FiiO SR11 (+ BRZHiFi LPSU) in NOS mode, fixed line output to Saba 760 Stereo tube receiver (1968. ITT-Lorenz ECLL-800 output tetrodes). USB C-C connection, UAC 2 mode, plays files located in NAS via DLNA (v174 firmware for SR11 streamer). Bubble UPNP app for Android.

Female vocal:



Male vocal:


Instrumental:



Bye Bye Denafrips Venus 😄

What mini rack is that?
Very cool little setup :thumbsup:
 
Oct 10, 2024 at 6:55 AM Post #768 of 956
Probably Topping

Some time ago, I replaced the acrylic shelves with bamboo (mini cutting boards):
XS109294sq.JPG

I sold it and now I regret that decision 😢
 
Oct 11, 2024 at 4:52 AM Post #771 of 956
@FiiO do you know the noise floor levels on at all on both 3.5mm & 4.4mm for the R2R?

Again, on the same topic… has anyone tried the K11 R2R with SE846’s? Any background noise?

Thanks
Dear friend,

Hi, you could check this form for help:
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Best regards
 
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Oct 12, 2024 at 2:46 PM Post #773 of 956

I love reviews like this. Dave specifically called out what he liked more about the original K11, and did it in such a straightforward way that I am convinced I would prefer the R2R version. He did not try to convey his preferences as some absolute judgement.
 
Oct 14, 2024 at 12:18 AM Post #774 of 956
Holy moly, just received my Fiio K11 R2R, what a prefect pairing with the HD620S to my ears (haven't tried my other cans yet), I still EQ to fine tune but I can reduce the number of filters and the gain on the ones staying. In fact, I could do without EQ too. The soundstage and imaging are also improved with the K11 R2R running on SE (compared to the K11 OG).

I'm totally sold on R2R in NOS mode.
Now that I have spent some time pairing the K11 R2R with the HD600, I have noticed using high gain sounds better than medium gain for the HD600.

High gain at 30 volume vs medium gain at 50, I have Windows volume mixer for K11 R2R & Spotify at max, while Spotify in app volume at around 50%, and an EAPO preamp -4dB gain. (I know for best sound I should max out all Windows and app volumes and use the amp to adjust, but I'm lazy and prefer to adjust in app as it's just easier.)

Is it expected that high gain can drive higher impedance headphones better even at low volume compared with medium gain at "medium" volume with plenty of headroom still?
 
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Oct 14, 2024 at 1:12 AM Post #775 of 956
Now that I have spent some time pairing the K11 R2R with the HD600, I have noticed using high gain sounds better than medium gain for the HD600.

High gain at 30 volume vs medium gain at 50, I have Windows volume mixer for K11 R2R & Spotify at max, while Spotify in app volume at around 50%, and an EAPO preamp -4dB gain. (I know for best sound I should max out all Windows and app volumes and use the amp to adjust, but I'm lazy and prefer to adjust in app as it's just easier.)

Is it expected that high gain can drive higher impedance headphones better even at low volume compared with medium gain at "medium" volume with plenty of headroom still?
Theoretically yes due to higher voltage swing.
 
Oct 14, 2024 at 4:06 PM Post #777 of 956
This combo with the Sennheiser HD660S2 is awesome. Can't stop listening.
I just put this exact set-up together as a second rig and completely agree with you. The S2 is capable of scaling higher, but you’re getting so much euphonic satisfaction and enough detail with a simple tube roll.
 
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Oct 14, 2024 at 4:07 PM Post #778 of 956
I just put this exact set-up together as a second rig and completely agree with you. The S2 is capable of scaling higher, but you’re getting so much euphoric satisfaction and enough detail with a simple tube roll.
Currently running a set of Psvane Horizon for review.
 
Oct 14, 2024 at 4:11 PM Post #779 of 956
Currently running a set of Psvane Horizon for review.
Nice! Yeah, i swapped out the stock tubes for the Psvane Art series. I would not mind trying out the Horizon series as a slightly more neutral option, if it can keep up with the Art series wrt technical performance. For a SE DAC though, I feel like the K11 is an excellent choice to feed a simple tube amp and won't need an upgrade unless I go deep into that part of the hobby.
 
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Oct 14, 2024 at 4:15 PM Post #780 of 956
Nice! Yeah, i swapped out the stock tubes for the Psvane Art series. I would not mind trying out the Horizon series as a slightly more neutral option, if it can keep up with the Art series wrt technical performance. For a SE DAC though, I feel like the K11 is an excellent choice to feed a simple tube amp and won't need one unless I go deep into that part of the hobby.
They are very technical and still very musical. Don't know about the Art because I swapped the stock tubes with JJ. I think that i prefer the Horizon!
 

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