Enter the modern hifi world. Try this test.

Thanks for your appreciation of my post  as OP...

I am interested by the Hiby  performance price /S.Q.  Especially the improved version which is really low price too ..

I had no use for it though. I am very happy with my French Battery NOS dac...

But i am happy to know about the Hiby Fc3....

My best to you...

 As a side note :

I debated many times since 7 years with Amir and one engineer from ASR...

They dont underastand the relation between acoustic and psycho-acoustic because they inherited professional biases from their "trade"...

A real scientist debunked  totally Amir  and i had arrived at the same conclusion for the same reason before him  years ago.

Read his two pages epitaph (pseudoscience in audio)  about  Amir ignorance : 

https://sites.google.com/view/kunchur/audio-acoustics 

@mahgister 

I read your profile and it showcases you as a person who is devoted to high quality audio reproduction, leaving no stone unturned with electrical, mechanical, and psychoacoustic properties that influence sound quality. 

I find your approach quite genius; Look for potential problems and embedding everything the right way BEFORE setting up you system. This is critical. I have seen many systems over the years with no room treatment and no modifications that could overwise improve the real-world performance of an audio system.

I have used shungite before, and it really works with most audio equipment. It also works in certain industrial applications to prevent excessive hum from noisy power supply circuits.

Understanding Shungite’s Role as an EMF Blocker

I recommend this for anyone who wants to read about it. No pressure.

I have heard similar iterations to the DACs you mentioned; and while the sound quality was very good, the HiBy FC1 was better. It was cleaner overall, and you have some power on tap to drive your AKG headphones. Personally, I use the AKG K872 for late night listening, when listening to my system in not an option (if I have family visiting the guest bedroom, or if everyone is tired and I can’t play the big rig). 

I would suggest trying the FC1 with the settings I suggested. The sound quality should really impress you. For best results, use it with your Sansui Alpha Au-607i on the "aux" or "line"  input, 3.5mm to RCA cable is the connection you want. They will be identical if only one of them is found on the back of the amplifier. For that integrated amplifier, it is the cleanest path that can bypass the internal parts that degrade sound quality. Use your android phone to go through the music and enjoy.

Thank you for your thoughtful and constructive post. I appreciate it.

@frank009 

My sincere apologies for bringing ASR up.

I still don't think that Audiogon is the best forum for your topic. Many contributors on this forum are of the opinion that "everything" in the audio system has a unique sound. You'll hear rebuke here also, but from the opposite direction compared to ASR.

Right now, I can't think of a better forum.

@mahgister 

Yes, I read the papers and watched the lectures from Professor Kunchur when they were first released/available.

"Pseudoscience in audio: ’Audio Science Review’ Was brilliantly written. See, this what happens when a true academic is attacked by self-proclaimed guru. You don’t get this far in life (The Professor) from just practicing junk science like ASR. Kunchur is highly intelligent and a good talker too.

I read some of your posts specifically going back and forth with the founder of ASR on here, and you practically, for all intents and purposes had the upper hand. You made the most sense and were reasoning correctly. Yet, he was sidetracked and refused to accept anything you said as valid; due to his own propensity to absorb misinformation as truth. At any rate, you made a solid impression and I’m sure he will think twice before challenging you again.

The FC3 may be similar, but have more power output for driving headphones.

@kevemaher

At this point, I'm not interested in fighting fire with fire with other forum members who disparage and insult me at every turn.

The forum would be much better if more members like you, mahgister, and ghprentice were around. I'm talking about personality and intellect, and you guys really have it. It's the truth. From what I can tell, when I hired employees they had the very same traits.

I dont remember anyone reading my posts and certainly not  giving me the upper hand over Amir sophisms and ignorance of fact. Kunchur  analysed his misrepresentation of concept  like an arrow on threw  so tight on target that i will hide myself in shame if i was Amir. But  many sellers had no shame only customers. The fact is most people are unable to understand these concepts. I had a hard time figure them out for myself for years using acoustics concepts for my first room.

My new hobby (My system/ second Room is done) is A.I. and mathematics.( It is a bit harder than psycho-acoustics because i understood acoustics by applying the concept but here it is purely theoretical but A.I. is my teacher and my pupil, i learn  why and how A.I. is a topological mirror and extension of our mind but nothing more. Creation is human gift. I will stop here.  ) 

Thanks for you appreciation....

@mahgister 

Yes, I read the papers and watched the lectures from Professor Kunchur when they were first released/available.

"Pseudoscience in audio: ’Audio Science Review’ Was brilliantly written. See, this what happens when a true academic is attacked by self-proclaimed guru. You don’t get this far in life (The Professor) from just practicing junk science like ASR. Kunchur is highly intelligent and a good talker too.

I read some of your posts specifically going back and forth with the founder of ASR on here, and you practically, for all intents and purposes had the upper hand. You made the most sense and were reasoning correctly. Yet, he was sidetracked and refused to accept anything you said as valid; due to his own propensity to absorb misinformation as truth. At any rate, you made a solid impression and I’m sure he will think twice before challenging you again.

The FC3 may be similar, but have more power output for driving headphones.