[Mutsu]

Yea, I think I'll try ordering the AD797s to try them, shame they take so long to be delivered. Might also try to source some of the others you suggested if I can find them cheapish.
 
I've since had other people listen to the new sound from my Essence One and they have all agreed that there is far lass bass and punchiness, however they all mentioned that the soundstage improved and there was more details in the trebles. But overall the concessus was that the stock op amps sounded better.
 
I'd put them back in but not sure they will work as the legs got pretty bent when I took them out. They might work if I bend the legs back but I think one of the legs looks too damaged and I don't want to run the risk of blowing the E1

 

[alfa147x]

Quick question. How do you know if OpAmps are interchangeable?
 

 

[Mad Max]

They are easily interchangeable when they are in sockets.
You can find photos depicting examples throughout this thread, iBasso threads (excluding the ones dealing with iBasso's slim amps), Zero DAC threads, Audio-gd threads dealing with the FUN, Sparrow, and Compass, fi.Quest threads, and more.

 

[ecohifi]

Hi Mad Max, you're right about the ADA 4610-2BRZ.   Very musical, cant live without them, they are more forward and the microdetails are easier to hear than the ADA 4627-1BRZ.  I even think the bass is more emphasised!  Great opamp that is well compensated internally and is more stable.
 
Again, thnxs and well done Mad Max!!!

 

[ecohifi]

Quote:

Quick question. How do you know if OpAmps are interchangeable?
 

Always download the datasheets from the manufacturer and compare pin configuration and compatibility.  You cannot swapt Opamps at will.
Check for supply voltage compatibility, what it is designed for and whether it is suited for audio.
 
 

 

[PurpleAngel]

Quote:

Quick question. How do you know if Op-Amps are interchangeable?

We were hopeful that you would do a lot of op-amp rolling (swapping) and tell us.
 
 
 

 

[alfa147x]

Thanks. Working on building my first amp right now. Figured I would find a opamp to use then build everything around it. 
Currently thinking about going with dual OPA627 / OPA637 but want to find a cheaper alternative to build with. 

 

[ecohifi]

Quote:

Thanks. Working on building my first amp right now. Figured I would find a opamp to use then build everything around it. 
Currently thinking about going with dual OPA627 / OPA637 but want to find a cheaper alternative to build with. 

There are better opamps than the OPA627/OPA637, If youre heading the OPA route I suggest the OPA827/OPA1611/OPA1641, I have never liked the OPA627, its expensive and disappointingly veiled!!!
I preferred the AD any day, way ahead in transparency of any OPA,  OPA are so Brown Burr!!!!
 

 

[sssboa]

Quote:

There are better opamps than the OPA627/OPA637, If youre heading the OPA route I suggest the OPA827/OPA1611/OPA1641, I have never liked the OPA627, its expensive and disappointingly veiled!!!
I preferred the AD any day, way ahead in transparency of any OPA,  OPA are so Brown Burr!!!!
 

Yeah, actually I would prefer anything to opa627, like any stock NEC etc.
BTW, do you know maybe something from AD maybe not that is even more than LM4562 ?  More airy, transparent, detailed, towards wider soundstage? Neutral or on the bright side and I like slightly recessed mids!
 
 

 

[alfa147x]

Thanks for the suggestion. I'll be going with the OPA827 instead. 

 

[Mad Max]

 
Quote:

Yeah, actually I would prefer anything to opa627, like any stock NEC etc.
BTW, do you know maybe something from AD maybe not that is even more than LM4562 ?  More airy, transparent, detailed, towards wider soundstage? Neutral or on the bright side and I like slightly recessed mids!

OPA827 without bypass caps tends to give the kind of sound that you are asking for.

 

[dumbears]

ADA4610 is the newest candidate here.  Before then, I saw OPA1662 introduced some discussions.  Which is better in terms of different music genres?
 
Pls advise.  Thanks in advance.

 

[Mad Max]

4610 has a deeper soundstage and is more neutral, so I would say it would be better for classical, jazz, acoustic, and electronic.  OPA1662 is warmer, rather red-orange in sound, and more intimate, so better for other kinds of music, small ensembles and stuff, I suppose.

 

[EraserXIV]

Any recommendations for a tubey opamp with liquid and sweet mids? Somewhat weighty low-end would be nice too.
 
For use in an M-Stage, looked into the LME49990, any thoughts?

 

[Mad Max]

I suppose OPA827's mids sound pretty "liquid", or OPA1602.  But not sweet.  I would replace the electrolytics before the opamp with Elna ROA "Cerafine" caps of equivalent value for that sweetness.  "Tubey"?  Closest thing would be OPA Moon going by what others say, but its bass sucks and has roll-off.