The Opamp thread

[imran27]

So you got two opinions now, OPA627 as the best and OPA1641. I haven't tested but from what I know the OPA1641 has better soundstage and is cheaper too

 

[Magic77]

So you got two opinions now, OPA627 as the best and OPA1641. I haven't tested but from what I know the OPA1641 has better soundstage and is cheaper too[/quote.

Yes, I have to say the the OPA627 is really awesome and sounds great with my amp. I don't intend to swap it out any time soon::But, I do agree that the OPA1641 is also great. I just had to try the OPA627 given the high reputation it has. I would also try the OPA827 which goes for $10 for each and supposedly rivals the OPA627.

 

[imran27]

I'd jump in with some sort of distraction....
 
I tried the ASUS Zenfone 5 (A501CG) recently with the M40x (I personally own HTC Desire 820, it sounds really good)
 
The sound of the ASUS Zenfone 5 was superb. Far, Far better than my HTC Desire 820 (DS). It sounds way more natural and bass and treble extensions are great.
 
What DAC chip and opamp it might be using? It is very good and if someone owns a good DAC/AMP he/she may give a comparison of sound.
 
Intel Atom does not have an inbuilt audio DAC (AFAIK).

 

[P701]

I'd jump in with some sort of distraction....


 


I tried the ASUS Zenfone 5 (A501CG) recently with the M40x (I personally own HTC Desire 820, it sounds really good)


 


The sound of the ASUS Zenfone 5 was superb. Far, Far better than my HTC Desire 820 (DS). It sounds way more natural and bass and treble extensions are great.


 


What DAC chip and opamp it might be using? It is very good and if someone owns a good DAC/AMP he/she may give a comparison of sound.


 


Intel Atom does not have an inbuilt audio DAC (AFAIK).

 

If you tried the headphones straight from the phones audio output, maybe it is due the difference in the phones output impedance?
From my own personal listening experience the output impedance has much greater impact on sound than DAC chip or OP amp itself.
This could be found out, if you had a headphone amp and you would put it between the phone audio output and the headphones and listen if they sound much different anymore, but I dont know if you actually had already done it like this?

 

[zhangsiyan12134]

I have a question about Op-amp replacement. When I compared two schematics, I noticed that ne5534 has three extra signals(COMP, COMP/BAL and BALANCE) than normal signal OP-amp. Can I use any OPA series (like OPA111) to replace ne5534?

 
Thanks everybody.

 

[Stillhart]

Hi folks,
 
I'm going to be upgrading my Adcom GDA-600 DAC soon and I need a little help.  The thread I'm following (HERE) is like 5 years old so I'm coming here to beg for info.
 
Basically, I'm looking for the opamp shown here:
 

 
It's an OPA627AU on a BrownDog 020302 adapter and DIP socket.  The best I could find is two Opamps mounterd on an adapter with a slightly different model name (020302A).  Can anyone verify for me if that's the same thing?  I'd rather not drop $100 on two opamps to discover it's not what I need...
 
Thanks!
 
EDIT - I think I found a post later on that confirms they're "dual opamp packages".  So yeah, this can probably be disregarded.  :-D

 

[Wishmasterx]

Have someone experience with bias to class A on OPA128SM? How much is best or maximal value for this opamp?
I have good result with bias on OPA627, but OPA128 have only 10mA Current Output (OPA627 have 45mA).

 

[palermo]

Hi folks, anyone tried ADA4075-2 as LPF or I/V converter ?

how it compare to ADA4841-2, ADA4896-2 and ADA5899.

ADA4075 can be found on CL Theorem 720 and Yulong DAC, so it quite good for filtering on DAC. I thought it popular for audio purpose, but never to be discussed in this thread. 

 

[Mad Max]

4075 is a very nice chip, though I haven't used it much.  Versus 8599?  I've only tried the single version so far, 8597, and I found 4075 to fall short of 8597 in soundstaging and bass in my old Compass DAC.

 

[palermo]

  4075 is a very nice chip, though I haven't used it much.  Versus 8599?  I've only tried the single version so far, 8597, and I found 4075 to fall short of 8597 in soundstaging and bass in my old Compass DAC.

 
thanks for your replay Max, 
 
Yes I familiar with 8599. As seen on my sig, ALO Island turn to different beast after being modded. 

 It give a soundstage that I cant find on fiio dap I tried. 
 
I like to mod a DAP, it uses pcm1792A dac, i/v, lpf and gain uses opa1612 and buffer buf634. all opamp get +-7v supply voltage. the complaint are slight narrow soundstage and being to forward for my taste.  
 
I plan to use muses8920 on lpf and gain, it would give warm and articulate vocal. the critical point is choosing the I/V converter, it has to give me a sense of wide and deep soundstage.
 
my option are something like ADA4841-2 or ADA4075-2. would you help me, which one I have to choose.

 

[Nazo]

EDIT: Moved to a more appropriate separate thread.

 

[Libertad]

Just got in the house a burson audio supreme op amp and its a huge improvement from the JRC4580D that came with my card

 

[wiz2596]

hi guys
 
I own a sound blaster zxr and currently 2 LME49710HA and 2 LME49720HA opamps on my card, I'm looking for the best possible quality for music listening especially metal music and rock but Im not much experienced in opamps, so I really appreciate if u could guide me on this.

regards

 

[wiz2596]

Someone?

 

[Apocalypsee]

Someone?

I'm using the same combo on my X-Fi Titanium HD. I don't think any other opamp combo would beat this