The Opamp thread

[pelopidas]

Hey, well since I got a decent break from work this Chistmas, I indulged in some serious rolling. The results are that the Lycan does still benefit from bypassing but nowhere near as much as the Fi-quest. My favourite bypassed OpAmp on both the Lycan and Fi-quest by a decent margin is the ADA4627-1BRZ. This OpAmp just comes alive with a Simlic II across the power pins. My Fi-quest has become my home amp for the foreseeable future with the HD800's fed from the HP out of the Oppo HA-1.

LME49990 and AD797 are my next favourite bypassed OpAmps. Not got around to modding the V5 yet but as I can realistically only use it in the Lycan I'm not sure there is much mileage in it. Just had some more Simlics II delivered so may give it a go anyhoo....

 
Man I cant believe I have to buy some 4627's now

Those things are 10 bucks each and I need 6 ... damn..
So tell us, what is your impression of the silmics on the Fi-quest? How does the 4627 compare to the output bypassed 5534?

 

[pelopidas]

Ok, what do you do when you don't want to spend 100 hrs per cap to burn them in? You create an abomination and burn them all at once!
 
I call it the Tower of Power

 
Its so damn ugly I wont let it anywhere near my good equipment and have it plugged into a cmoy. But it works. After measuring DC offset at 2mw I even gave it a listen. It works and sounds pretty ok but not excellent. There are some weird harmonic issues which could also be the endless connections or the fact that I am listening to a 49720 instead of the Burson. I am not going to let the V5 anywhere near this.
I tried this with the 49990 and the 797 too and surprisingly it is stable. No oscillation or heat whatsoever.

 

[zilch0md]

I received my V5 duals today (16 days).
 
http://www.head-fi.org/t/784790/burson-supreme-sound-audio-v5-opa-d-v5-opa-s-review/75#post_12253412
 

 

[zilch0md]

More whining combined with sincere praise for the V5 Duals:
 
http://www.head-fi.org/t/528149/ibasso-pb-2-pelican-fully-balanced-portable-db-2-dac-hiflight-recommended-op-amps-page-16/1305#post_12260674

 

[justbenice]

Hi all.
Can i upgrade Ne5532 in my CDPlayer to Muses01 ? 

 

[Michael V]

My burson v5 opamp is coming in soon and I want to add the capacitor to it so I bought the silmic II 10uf and spare sockets. I've never dealt with op amps or capacitors before so I'm slightly confused. I just want to have everything ready for when my burson comes in.  
 
 
I was looking at this diagram and when I receive the burson how do I tell which side is which?

  Here is the pinout for both a dual or single OPAMP:
                           DUAL                                                  SINGLE

              
 
The longer leg is normally the positive, so the shorter leg will go to pin 4. Unless of course you have a bipolar capacitor then it wont matter. 
 

 
 
Also there is a half circle on one side of the socket, does it matter which direction you plug the burson into the socket? Thanks

 

[Michael V]

Nevermind I figured it out by looking at pictures posted previously. It was so easy even a noob like me could do it lol! I just have it connected to my opa2017 for now until my burson comes in.

 

[zilch0md]

Nicely done!  
 
What did the cap do for the sound of your OPA2017?  Anything noticeable?

 

[kahei036]

  My burson v5 opamp is coming in soon and I want to add the capacitor to it so I bought the silmic II 10uf and spare sockets. I've never dealt with op amps or capacitors before so I'm slightly confused. I just want to have everything ready for when my burson comes in.  
 
 
I was looking at this diagram and when I receive the burson how do I tell which side is which?
 
 
Also there is a half circle on one side of the socket, does it matter which direction you plug the burson into the socket? Thanks

 
 
Here is how I have it set up so far before I solder it

Hey Mike..
Base on your second pic it seems you have connected the bypass cap to pin 1 and 5 instead of the vcc+ and vcc-..
Hope you've already figured this out got it soldered correctly..
 
The arc on IC socket usually indicates it's the "up" side of the IC; you probably will notice a "dot" on an IC, that usually indicates it's pin1 (datasheet would proobably the best to tell). And this dot usually is in same direction as the arc on an IC socket.

 

[Michael V]

  Nicely done!  
 
What did the cap do for the sound of your OPA2017?  Anything noticeable?

So far it seems to just have given songs a blacker background and instruments are slightly clearer because of that.

 
Hey Mike..
Base on your second pic it seems you have connected the bypass cap to pin 1 and 5 instead of the vcc+ and vcc-..
Hope you've already figured this out got it soldered correctly..
 
The arc on IC socket usually indicates it's the "up" side of the IC; you probably will notice a "dot" on an IC, that usually indicates it's pin1 (datasheet would proobably the best to tell). And this dot usually is in same direction as the arc on an IC socket.

Yea I noticed that before I soldered it and switched it around. Thanks!

 

[zilch0md]

^ you might want to pull that photo from that post before a guy like me (doh!) uses it as a guide when soldering. I had already saved the photo.

Thanks!

 

[Michael V]

^ you might want to pull that photo from that post before a guy like me (doh!) uses it as a guide when soldering. I had already saved the photo.

Thanks!

Yea good idea lol, just removed it.

 

[zilch0md]

^ Thanks!  Hopefully, kahei036, to whom I am grateful for noticing the problem, will do the same in his having quoted your post.  

 

[RamGuy]

I'm considering to change the op amps on my Xonar Essence One and I'm considering going for 4x Muses 01 or 4x LME49990 for the IV's, and 2x Muses 01 + 2x Muses 01 for Low-Pass and buffers or perhaps 2x Supreme Sound Opamp V5 + 2x Supreme Sound Opamp V5 if they would even fit inside the Xonar Essence One.
 
But how would I know if I'm actually getting genuine and legit op-amps? The easiest way to order is through E-Bay but I'm afraid I end up with fake op-amps even when the seller is rated as "Top Seller".

 

[zilch0md]

The LME49990 has been discontinued, so I have to wonder where these sellers are getting them?

As for the JRC Muses, I ordered mine from Mouser.com, just to be sure they were genuine, but it cost me $150 for a pair, plus shipping!

I don't how to advise you, except to say that, at least with Burson, you'll be getting real Burson product, and even a pair of V5 duals costs less (at $130) than what I paid for a pair of genuine Muses 02.