What I think is that it must indeed be the type and distribution of harmonic distortion what determines the dominant colors (thus the numbers in their code, really 🙂) of every opamp.
That said, I don't understand what you're trying to suggest. 😱 Do you want to confirm your personal prejudice that I'm desperately seeking some sort of coloration, maybe? 🙂
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I like the OPA1611, LME49720HA, LT1028ACN8, for one specific common reason, mainly: that they're tonally as transparent as opamps get, meaning that they mostly let the records' own dominant colors through, without superimposing a common 'colored curtain' to all sounds, nor washing all the colors out of them (the latter being a vulgarly false idea of neutrality). 🙂
Of course, they're also very hi-fi sounding opamps, meaning hard to criticize in any parameter of the typical audiophile conception of sonic fidelity. 🙂
Of course, they're also very hi-fi sounding opamps, meaning hard to criticize in any parameter of the typical audiophile conception of sonic fidelity. 🙂
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Simple: numbers are universal; letters and language are human only. Therefore, I interpret those letters exactly the way you do: following their conventional meaning. 🙂NelsonVandal said:
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I think it's really beyond our reason to understand how numbers are the foundation of all order in the whole universal multiplicity; and by this I mean, far beyond our rational, mathematical approach to them.
I'm really a modern day pythagorean, am I
I'm really a modern day pythagorean, am I
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PCM56 + LME49720HA = 145679, decently good 🙂
Yes, just a little, though this kind of improvement can never override the consideration of numbers i.e. sonic compatibility DAC-to-opamp. 🙂
Pretty bad really. I'd rather use the LT1028 here, or others.
Pretty decent, but you're not gaining anything really from the different opamps, since they're not different enough 😱 Better TDA1543 + OPA1612 + OPA827 for instance 🙂
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btw, I was wondering...my soundcard requires "unity gain stable" opamps...
so if it says "-1 gain stable", it's no good! but what about "+1 gain stable"...is that unity gain stable too? 😱
so if it says "-1 gain stable", it's no good! but what about "+1 gain stable"...is that unity gain stable too? 😱
Stable in gain of -1 means that the opamp is stable in (phase-) inverting unity gain. It's not the same thing. Just look at LT1028 and LT1128.
ok ok, but if it's +1...is it also unity gain? or are we talking about 3 different things here?
basically unity gain opamps are a roller's best choice if I understand correctly? it means they will play nice in most and every design w/o modification?
basically unity gain opamps are a roller's best choice if I understand correctly? it means they will play nice in most and every design w/o modification?
I really like LT1113ACN8: Linear Technology - LT1113 - Dual Low Noise, Precision, JFET Input Op Amps
is it unity gain stable please?
it's replacing two OPA2134P, is that OK? 1113 is JFET and 2134 is FET.
is it unity gain stable please?
it's replacing two OPA2134P, is that OK? 1113 is JFET and 2134 is FET.
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Its worth checking out the new ADA4627-1, which is unity gain stable (i.e. you can use it as a buffer) and sounds great. I got samples from Analogue Devices, so even better because they were free! 🙂
oh ok, I thought it was FET...so is LT1113ACN8 a drop-in replacement for OPA2134P?
doess +1 stable means it's unity stable?
I put two LT1113ACN8 as AK4396 LPF buffer and I was told on another forum:
anyway, LT1113ACN8 sounds really great..the more expensive their op-amps, the better they sound 😀
doess +1 stable means it's unity stable?
I put two LT1113ACN8 as AK4396 LPF buffer and I was told on another forum:
anyway, LT1113ACN8 sounds really great..the more expensive their op-amps, the better they sound 😀
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Yes, if you look at the very end of the data sheet it shows it used in a unity gain application.
ok thanks, where did you see this? I must be blind 😱
it says you can add some components around it to make it unity gain stable...that's what I understood anyway..
so if I read carefully the post I quoted about my soundcard...I need to use opamps that are either stable at +1 or unity gain stable(is that the same thing? sorry for the noobish question!!)
and LT1028/AD797 are stable gain <1, so they're no good to me? they were making strange low frequency garbled sounds from time to time tbh...but well using browndogs in a PC case is a terrible idea anyway 🙄
so unity gain stable is better for blind op-amp rolling basically?
thanks for your help! I think I'll keep the LT1113ACN8 in there for a while, I love how it sounds 🙂
it says you can add some components around it to make it unity gain stable...that's what I understood anyway..
so if I read carefully the post I quoted about my soundcard...I need to use opamps that are either stable at +1 or unity gain stable(is that the same thing? sorry for the noobish question!!)
and LT1028/AD797 are stable gain <1, so they're no good to me? they were making strange low frequency garbled sounds from time to time tbh...but well using browndogs in a PC case is a terrible idea anyway 🙄
so unity gain stable is better for blind op-amp rolling basically?
thanks for your help! I think I'll keep the LT1113ACN8 in there for a while, I love how it sounds 🙂
Datasheet here, second paragraph under "description"
http://www.datasheetcatalog.org/datasheets/270/57393_DS.pdf
Unity gain stable means gain of 1 which is for example a buffer with the inverting input tied to the output.
The AD797 is unity gain stable but only if used correctly... this is why I keep saying to Andre that you can't just drop in devices with no regard to the circuit it's going into, and why it's necessary to optimise for a given opamp.
http://www.datasheetcatalog.org/datasheets/270/57393_DS.pdf
Unity gain stable means gain of 1 which is for example a buffer with the inverting input tied to the output.
The AD797 is unity gain stable but only if used correctly... this is why I keep saying to Andre that you can't just drop in devices with no regard to the circuit it's going into, and why it's necessary to optimise for a given opamp.
Attachments
I want to put a headphones amplifier in to a cd player,
the 30mA of the opa1611 isn´t sufficient to move directly a headphones?
Which buffer, will be adecuate to that o_amp.?
the 30mA of the opa1611 isn´t sufficient to move directly a headphones?
Which buffer, will be adecuate to that o_amp.?
ok, thanks Mooly...finally some technical details I understand 😀
so I should only use op-amps that are given to be stable at a gain of 1(= unity gain).
I wish I could get the LT1028/AD797B stables, but it seems like a lost cause?
apparently LT1128 might be worth a shot, though? I really miss the 1x28 color as final buffer 🙁
so I should only use op-amps that are given to be stable at a gain of 1(= unity gain).
I wish I could get the LT1028/AD797B stables, but it seems like a lost cause?
apparently LT1128 might be worth a shot, though? I really miss the 1x28 color as final buffer 🙁