Actually, the LME49710HA is one of my favorite -well for certain circuit positions anyway. I have built them into dual channel modules and sent them off to about 10 people and each time I got back favorable results.
They have proven to have a more pleasing sound then their plastic counterparts, well atleast from testing we did anyway. Everybody uses different gear so testing results will vary.
BTW, I appreciate your information.
Last edited:
@Andrea: what do you say about this? Head-Fi: View Single Post - The Opamp thread
from what I see LT1124ACN8 isn't either(A-VCL that is), and it sounds amazing..
OPA228P and LT1126ACN8 are decompensated, that's a big no-no indeed...so AD797BN/LT1028ACN8 no workee? 🙁
from what I see LT1124ACN8 isn't either(A-VCL that is), and it sounds amazing..
OPA228P and LT1126ACN8 are decompensated, that's a big no-no indeed...so AD797BN/LT1028ACN8 no workee? 🙁
Last edited:
False, the OPA228 and 2228 should work fine in the intermediate analog stage of your card, because their outputs won't have to drive any capacitive loads (cable capacitance...), and these are specified as stable in unity gain if no capacitive loading is needed. The same would be true for the LME49722.
And also, most probably, for the LT1028. Just check that it doesn't get too hot, as it's only supposed to get a bir warm. If things look hot, then don't use it. The same goes for the AD797.
Different matter for the OPA637 and even worse LT1126, which are more decompensated than all the above.
The LT1124 is unity gain stable.
And also, most probably, for the LT1028. Just check that it doesn't get too hot, as it's only supposed to get a bir warm. If things look hot, then don't use it. The same goes for the AD797.
Different matter for the OPA637 and even worse LT1126, which are more decompensated than all the above.
The LT1124 is unity gain stable.
Note that both my DACs' output stages have gains of around +1, and the LT1028 works perfectly stable and performs better than all the rest I've tried so far.
Not for me with my SVDAC05. The LME49710HA, as I said, had this metallic glare that took away the natural color of the music more than the LME49710NA did, and you can count that I made sure of this before I removed the sockets & soldered the latter...ROBSCIX said:
Though eventually the LT1028ACN8 came in to stay as it made things sound better than with both the above (like with my other DAC, except that with the Super Pro the LME49720HA was more interesting by comparison).
oh, 1124 is gain stable? that's not what the PDF says 🙁
hehe, yeah...many ppl telling different stories about these chips...it gets odd at some point 😀
hehe, yeah...many ppl telling different stories about these chips...it gets odd at some point 😀
I actually just snapped in a set of LT1028ACN8 sound pretty good just from basic testing. I will have to spend more time listening.
We all use different gear so signature will vary to a certain extent.
I have enjoyed the LME49710HA's I don't hear a metallic glare...
Opinions vary I guess.😀
Linear Technology - LT1028 - Ultra Low Noise Precision High Speed Op Amps
"The LT1028(gain of –1 stable)/LT1128(gain of +1 stable)"
shouldn't you trade them for 1128 now ?!?!?! 😕
There's nothing odd. There wouldn't exist an LT1126 if the LT1124 wasn't compensated for unity gain applications. And also, how could an opamp with 12.5 MHz of GBW and just 4.5 V/us of slew rate be unity gain unstable? 😛
Trust me... even if I haven't read the datasheet in detail
Trust me... even if I haven't read the datasheet in detail
Last edited:
Heh, tried the LT1128ACN8 and it wasn't any more stable than the 1028 inside my DACs. Plus, it definitely sounded worse (not as transparent and more dark).
But if you want to feel perfectly safe, just use the LT1128. For me there was no point in reverting to the less brilliant over-compensated (for my application) 1128.
That midrange "glare" was but a subtle characterisation. Also, if you keep them in then soon you don't notice it anymore at all. It's just a different kind of feel vs. most plastic opamps, though not in such a dramatic way..
Besides, compared to most plastic opamps the LME49270HA sounded more bold and groovy - don't know if this is very accurate. To me the LT1028 has all the fullness required but never too much.
Last edited:
I haven't used them in quite a while but I did like them when I had them installed. I have built modules for quite a few people and had postive feedback everytime. Taste and opinions vary.
righty, so I can still give a shot at four LT1363CN8/LT1028ACN8 and AD797BN...if SQ is foobar'ed, that'll be a good indicator that something's wrong(my PC case has extreme cooling so it'll never get hot) 😛
how would you know that it wasn't "any more stable"? got an oscilloscope?
how would you know that it wasn't "any more stable"? got an oscilloscope?
I did say I like them! It wasn't an easy choice between soldering the LME49720HA or the LT1028CS8 inside my Super Pro, when I got rid of the socket. Ultimately though I'm happy with my choice - but I could've lived with the LME49720HA as well, like with the LME49723 (& unlike with the LM4562 or the LME49860).
No, you can judge stability with the combination of your fingertip 🙂 and your hearing. The chips don't get hot + the sound is quite smooth including the highest treble. The same for both DACs.
So far I am liking these LT1028's. I snapped them into an adapter.
I will have to do further tests today but they are sounding pretty good with this current tests circut.
I will have to do further tests today but they are sounding pretty good with this current tests circut.
And the more you listen, the more you like it and realize how transparent it is... at least it happens for me. While all the rest became somehow tiring after some time, due to this or that deviation from transparency (which might also have been pleasant in the beginning).
humm 4*LT1363CN8 is very tasty indeed 
http://img517.imageshack.us/img517/9529/1363g.jpg
what is it that you didn't like about this one after a while? what's so much better on the 1028 again? 😛
ah well, I'm bored of the moronic chitchat in the other thread, some ppl seem to have ego problems..the best revenge is living well as they say 😎
PS: it truly takes the headphones off your head 🙂
and I forgot how great the bass sounds!
http://img517.imageshack.us/img517/9529/1363g.jpg
what is it that you didn't like about this one after a while? what's so much better on the 1028 again? 😛
ah well, I'm bored of the moronic chitchat in the other thread, some ppl seem to have ego problems..the best revenge is living well as they say 😎
PS: it truly takes the headphones off your head 🙂
and I forgot how great the bass sounds!
Last edited:
..is this unit one of your personal favorites from LT, any others?
I have a bunch of LT opamps but I only like a few of them. IIRC, they do not concentrate their design efforts on audio so it is hard to know what to order. Any suggestions on unit to look to?
I have tested so many opamps in the last few years but LT has not really been part of my testing.😱
I am all for transparent opamps. I have to do more testing though as they showed up today in a package of components I ordered.