The Fiio A5 thread: an upgrade of E12A, MUSES02+LME49600, 800mW, 19Vp-p, 12 hours
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riodgarp

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are fiio A5 still has imbalance issue with low volume (due to analog potentiometer weakness) ? has somebody modifying it to more balance without using external attachment like impedance adaptor or something else ?
 
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Slater

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are fiio A5 still has imbalance issue with low volume (due to analog potentiometer weakness) ? has somebody modifying it to more balance without using external attachment like impedance adaptor or something else ?
This is the 1st I’ve ever heard about this.

When you say “low volume”, exactly how low are you talking? Because I sometimes listen at pretty low volumes, and I’ve never heard any kind of imbalance.

If you’re talking so low it’s barely even perceivable, then I’m personally not too worried about it.

Just curious...
 
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riodgarp

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This is the 1st I’ve ever heard about this.

When you say “low volume”, exactly how low are you talking? Because I sometimes listen at pretty low volumes, and I’ve never heard any kind of imbalance.

If you’re talking so low it’s barely even perceivable, then I’m personally not too worried about it.

Just curious...
my e12a usually feel unbalance for my sensitive iem for position below 9 o clock eventhough they said that amp dedicated for iem and low impedance cans
 
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Slater

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my e12a usually feel unbalance for my sensitive iem for position below 9 o clock eventhough they said that amp dedicated for iem and low impedance cans
Interesting...I’ll check mine out later today and see if I can notice a difference. I own both the E12A and A5, so it will be interesting to see if one or the other or both have the balance issue you’re describing
 
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tmb821

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I’m curious. Currently I run a nx3s fed by a btr3, usually hooked to my k240s, sometimes my shp9500. Always use amazon music hd. I changed the opamp to a NE5532. I have no complaints with this setup, just wondering if the a5 would be any better? I think I may have getnewgearitsshinyitis!
 
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cherryind

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I have replaced Muses 02 with OPA2156, difference i've noticed is night and day! I'm using Shanling M2x (Tidal) -> E12a -> BQEYZ Spring 1. Anyone tried OPA2156? Its the most musical sound i've ever heard! Any suggestions for modding/adding caps?
 

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Slater

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I have replaced Muses 02 with OPA2156, difference i've noticed is night and day! I'm using Shanling M2x (Tidal) -> E12a -> BQEYZ Spring 1. Anyone tried OPA2156? Its the most musical sound i've ever heard! Any suggestions for modding/adding caps?
Where did you get the OPA2156? And did you install a socket, or just solder the chip in place? Thanks
 
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cherryind

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Where did you get the OPA2156? And did you install a socket, or just solder the chip in place? Thanks
I bought it from mouser. Opamp is soldered on to an adapter and I soldered it directly. :)
 
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Slater

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I was thinking about replacing my
opamp with either of these.

71CCB217-93E1-42DC-8FAE-06525A08D949.pngFAF6584C-5A6C-4DA9-A541-1FC1D63403C7.png

Does anyone have experience with either of these, or know anything about them? I’ve never really seen that type of opamp before.

The specs on the V6 look good. I’m not sure how they would compare to a more well known opamp (something from Ti) or if the above ones would even fit under the FiiO case.
 
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Babu28

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FiiO A5 upgraded!!! I change MUSES02 to OPA 2227P from BB. Now A5 sounded ammazing! OPA 2227P have on this circuit PCB better sound than MUSES02. I tryed OPA 2228 P (BB) and it is great too, but not more musician than OPA 2227P. Now A5 have better soundstage (wider), and have more details, better treble, and has probably better S/N Ratio, and better THD+N, because OPA 2227P have nice parameters of thies two. I not understand why is MUSES02 so expensive, cost much more than better op. amps. I tried more oamps forexample LME49720, LM 4562, but this two are much fast for this circuit pcb, OPA 2132 P sound great, but not for me. OPA 2134 PA sound is wrong with this OA, OP 275 from TI sounded same as MUSES only treble tones have not some detail as MUSES02. Absolute winner is OPA 2227P from Burr-Brown (TI).
 
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