Quote:
Originally Posted by fetalgoat
I'm using the LT1361. IMO it's a huge improvement over the lm4562.
I tried the opa2107, which is meant to sound similar to the opa627, and it wasn't a good match for the sennheisers. Too dark and reserved. I'm fairly new with all of this but I have tested out a few different opamps and here are some of my thoughts.
OPA2107 - Dark & muddy. Sounds very poor with sennheiser 650s. Mids are reserved and in the distance. Not a good match for my equipment.
LM4562 - Stock Opamp. Mids are very compressed and sterile
sounding. Bass is very fake sounding. Highs are harsh. Someone mentioned that this opamp was like a robot on steroids. I would agree with that. Might be ok if you have an insanely warm amp or something but I just didn't like the way it sounded on my setup at all.
LT1361 - Mids are more pronounced. Warmer than the LM4562 but more detailed with more impact at the same time. More airy as well, doesn't sound as compressed. Better separation I would say. Bass sounds more natural, also deeper. Highs are warm and not harsh. I think this is a very good match for sennheisers. Very natural and pleasing sounding.
LT1469 - This opamp is clinically precise, very fast and extremely detailed at higher frequencies. I would say it borders on being ridiculously detailed at higher frequencies. You're able to hear things you wouldn't otherwise hear, and perhaps wouldn't want to hear because it's so bright. Everything else kind of sucks with it though. Sounds very sterile and digital. Bass isn't as deep and doesn't have the same impact as the lt1361's. It's also missing the nice warm and detailed mids of the lt1361.
I'm very happy and have to say very surprised, as well, that the LT1361 sounds as good as it does. This is one of the best improvements to my system to far I would say.
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The LT1360 and LT1361 are good op-amps, although not the best in the noise department. I would recommend using them in an inverting application, not non-inverting. Good output driver.
Another one to try is the AD844. Also a good output driver.
Steve N.
Empirical Audio