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The Opamp thread - Page 291

post #4351 of 4406
2/3/13 at 6:36am

Just got a cople of metal cans LME49720HA. Replaced it on my Xonar HDAV1.3 on buffer stage (previously DIP LME49720NA) and replaced the utput opamp from LM4562 to LME49720NA. I can't believe the clarity and the soundstage the HA offers over the NA. It sounds like a totally new opamp! Much MUCH clearer and more defined.

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post #4352 of 4406
2/3/13 at 9:24am

Awesome!   Ears be happy!

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post #4353 of 4406
2/3/13 at 11:51am
Quote:
Originally Posted by Apocalypsee View Post

Just got a cople of metal cans LME49720HA. Replaced it on my Xonar HDAV1.3 on buffer stage (previously DIP LME49720NA) and replaced the utput opamp from LM4562 to LME49720NA. I can't believe the clarity and the soundstage the HA offers over the NA. It sounds like a totally new opamp! Much MUCH clearer and more defined.

hows the bass?

 

crap I'm betting.

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post #4354 of 4406
2/4/13 at 2:17am
Quote:
Originally Posted by WiR3D View Post

hows the bass?

 

crap I'm betting.

Not really crap, it got less punch than before but I'm no basshead so its a non issue to me. I don't recommend people to get this if they wanted bass, because there isn't much of it. LME49720 just screams details and soundstage but not bass.

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post #4355 of 4406
2/4/13 at 4:40am
Quote:
Originally Posted by Apocalypsee View Post

Not really crap, it got less punch than before but I'm no basshead so its a non issue to me. I don't recommend people to get this if they wanted bass, because there isn't much of it. LME49720 just screams details and soundstage but not bass.

Yeah I know, its their flaw, that and some wonky upper mids sometimes. 

 

if you like smooth go THS4032 - or if you want as much detail as detail as possible without going discrete AD797 (its gamble on whether it will oscillate) and to me its a bit harsh, I prefer a smoother sound. Both have huge soundstage, the AD797 having the most, and the THS4032 having the better imaging. I had 2x LME49710 metal cap mounted on a PCB for comparison, which is better then the LME49720 and the AD797 and THS4032 slaughtered them in everything. (Listening with AKG's on my STX)

 

Those are probably the 2 with the most clarity, and the LME49990.

 

and BTW 3x THS4032 (2 in I/V and one in Buffer) is too much, its too smooth.

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post #4356 of 4406
2/5/13 at 6:21pm

I'm noticing some unnatural sounds in the upper mids with the  OPA1641, anyone else notice this?

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post #4357 of 4406
2/5/13 at 7:57pm

Are you sure it isn't distortion?

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post #4358 of 4406
2/6/13 at 2:17pm
Quote:
Are you sure it isn't distortion?

No, i have know way of knowing if it is distorting or not.

 

Everything else sounds fine, but some frequencies just sound garbled ( highly technical term there ).

 

Did not know it was possible for an op-amp to only distort certain frequencies.

 

what would one do to prove or disprove this?

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post #4359 of 4406
2/11/13 at 11:57pm

looking into getting some better op amps than the stock amp (4556AD JRC) and wanted to see if anyone can recommend one for my taste. i like details, balance, natural, clarity, smooth (but not too smooth), and a bit on the bright side (but not too bright). would the LME49990 suit me well for this or?...

 

here is the layout of the board i will be placing it in and the ebay page of the specs for it

http://www.ebay.com/itm/Professional-HiFiMAN-EF5-Headphone-Amplifier/170696111860

 

thanks!

 


Edited by doco - 2/11/13 at 11:58pm
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post #4360 of 4406
2/12/13 at 12:37am
Quote:
Originally Posted by doco View Post

looking into getting some better op amps than the stock amp (4556AD JRC) and wanted to see if anyone can recommend one for my taste. i like details, balance, natural, clarity, smooth (but not too smooth), and a bit on the bright side (but not too bright). would the LME49990 suit me well for this or?...

 

here is the layout of the board i will be placing it in and the ebay page of the specs for it

http://www.ebay.com/itm/Professional-HiFiMAN-EF5-Headphone-Amplifier/170696111860

 

thanks!

 

 

Since they are directly driving the headphones, the stock NJM4556 are a good opamp due to their high current output and good performance into low impedance loads.

A lot of the opamps that are popular choices use in a buffered gain stage, aren't great at directly driving headphones.

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post #4361 of 4406
3/5/13 at 3:46pm

Hello Fellows,

Do you know if Burson descreet op amp fit to CMoy BB ? Will it work? I know AD8066 work, but look for some BIG upgrade

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post #4362 of 4406
3/5/13 at 7:29pm

If the Cmoy has a huge case, then yes.  The opamp might be almost as big as the cMoy circuit, LOL!

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post #4363 of 4406
3/5/13 at 7:40pm
Quote:
Originally Posted by Synthax View Post

Hello Fellows,

Do you know if Burson descreet op amp fit to CMoy BB ? Will it work? I know AD8066 work, but look for some BIG upgrade

For that sort of money, DIY a better amp.

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post #4364 of 4406
3/6/13 at 7:55am
That, too, lol!
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post #4365 of 4406
3/6/13 at 3:35pm

Well, the dimensions are not a problem as I'm thinking of putting my cmoy to new case. With bigger battery. But my question is if this Burson Op Amp work with my jds cmoy bb? And if it is worth to make it?

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