The Xonar Essence STX Q/A, tweaking, impressions thread
Sep 26, 2011 at 2:56 PM Post #2,643 of 5,721
Just popped in two LME49720NA's into my STX's op-amps. I didn't realize how easy the process is; I think uscrewing the EM shield took longer than replacing the actual op-amps! I'll wait for the burn-in on these until I pass final judgment, but I'm already noticing much clearer bass and an ability to pick more easily pick out each instrument.
 
Lovin' this card, especially since the op-amps were free! (thanks law school)
 
Sep 26, 2011 at 4:31 PM Post #2,644 of 5,721
w00t, finally have my ingredients all gathered for a supreme sound --> 2x LT1364's for I/V and 1x OPA1612 with Browndog adapter for the Buffer stage. Took ages to compile just this all from the States' as I live in Aus. Also got a Wiha ESD Safe Chip Lifter. Installing tomorrow and getting a technician I know to do the adapter soldering for me. Will let you's know how she sounds :) Can't wait.
 
Sep 26, 2011 at 7:40 PM Post #2,645 of 5,721


Quote:
Just replaced the 2 stock op amps on the Asus Essence ST with two LME49720NA's.  I like what I hear.
 
I got a message on another forum from a guy saying he could build me a pair of LME49720HA - metal can op amps, and that they are "high grade adapters with gold plated pins and tracings using high grade solders" and that he uses TO-99 metal cans.
 
[size=x-small]I have idea what the difference is between those and what I just installed.  Thoughts?[/size]


Make sure he installs them correctly and checks to verify, and double check yourself that they are installed correctly.
I bought some cheap opamps on adapters from china and one of them was installed incorrectly, but I didn't notice.
It killed my STX along with the headphones I was using.
 
 
Sep 29, 2011 at 6:36 PM Post #2,646 of 5,721
I thought I was done rolling opamps but is anyone running denon d2000 straight to the card any opamp suggestions?  As of right now I'm running 2x lme49720ha's.  


LME49860 or LME49990.
(I use two LME49860 currently)
 
Sep 29, 2011 at 7:40 PM Post #2,648 of 5,721
LME49860 or LME49990.
(I use two LME49860 currently)


Yeah just ordered samples of 49860. Could you tell me how those and 49990 hail in comparison to what im running now?


Do not really have enough experience to say.
I installed the LME49860s about two days after buying my Essence STX.
But the LME49860s do sound good to me.
I've just heard positive reviews on the LME49860 & LME4990s op-amps.
 
Oct 4, 2011 at 12:47 PM Post #2,653 of 5,721
Okay, just finished reading through all 177 pages.  I have some questions on I/V opamps.  It appears that the THS-4032 may be a very good choice for I/V.  However, many have said that it can oscillate.  Does anyone think that it needs a film cap across the power rails in this configuration on the Xonar?
 
Would a dual THS-4031 configuration be good in this I/V?  I've also read that the THS may get hot under certain circumstances and I wouldn't want to compound the problem.
 
Also, based on reading, the THS-4032 may be a very transparent un-colored opamp for this configuration.  The only other non-discrete opamp possibility to compete with this would be the OPA627.  However, the OPA627 is definitely more expensive and, since it's a BB device, it may have a more laid back tube type of signature.  Am I assuming correctly?  I haven't read anyone who has used the OPA627 in I/V and given a comparison review or sonic signature. 
 
The Bursons are wonderful I'm sure, but I don't want to put that much money into this card.
 
Thoughts?
 

Users who are viewing this thread

Back
Top