He didn't comp you? Hmmm, I'm supposed to pick him up at the airport in an hour, I think I'll leave him standing at the curb.
No, accuracy is accuracy. Recording preferences are a fad. Now if the fad is cheap and easy it might be fun.
In your case tattoos are really in now, so why don't you get a full body one! Maybe the circuit of an AD797 on your forehead? ( 🙂 for the humor impaired!)
Now on a serious note, the folks listening are pros who do real events. They work with microphones such as the SM58 from Shure. They mix for a specific sound. If they deviate from what the artist and management think is right they won't be working for very long. So yes they prefer things that are the color choice of the moment. Now slowly but actually changing is a drift towards more accurate reproduction even in "concert" situations.
Now I showed a microphone preamp that is the lowest distortion of all we looked at. It is attached again. Please note on the LME49600 I have the input pin number wrong it should be pin 2. Attached is the performance THD plot.
The wise will note some influence from those 30 year old circuits JC is so fond of. It is designed to use similar techniques to reduce the distortion from the "perfect" opamps. Some may even improve it by using R.M.s discrete buffer stage.
It is the old line "I can see so far because I stand on the shoulders of giants!)
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> the offset issues on that amp are very serious at 48V supply.
Even with some feedback and the trimmer trimmed ?
Even with some feedback and the trimmer trimmed ?
Look at the slope of the curve for 24V Vgs and 3ma for instance, I would at least match the drain load with a dummy resistor. Look also how much the input current modulates with Vgs at this point (2Meg * 50nA = 1V !)
EDIT - From what I saw the LSK parts might not drop in here either. Oops it's worse than that both the 2SK and LSK74 are speced at 25V max. If this circuit rails during turn on almost the full 48V may appear across at least one of them with no real limiting protection. In any case any swing beyond a few volts exceedes the max spec.
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Speaking of , any info on this Mod ...
Behringer DCX2496 Crossover - Jan Didden Active Modification W/ Remote Volume!
EDIT : found it ...
http://www.linearaudio.nl/linearaudio.nl/index.php/my-projects/dcx2496-6-channel-vol-control
Behringer DCX2496 Crossover - Jan Didden Active Modification W/ Remote Volume!
EDIT : found it ...
http://www.linearaudio.nl/linearaudio.nl/index.php/my-projects/dcx2496-6-channel-vol-control
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Interesting use of semantics on this thread 😀
I have sat in the company of decent musicians playing live acoustic music on many occasions, often the sound they produce improves when I consume more alcohol but then starts to degrade as they consume more alcohol 😉
I am yet to hear a hifi which can faithfully reproduce that sound. In my humble opinion it is probably best practice to aim for neutrality when designing decent components for audiophiles, even though it makes some recordings sound dam awful.
But it's probably best to include tone controls when designing mass produced cheap stereos for the general public. They expect it and would probably think you had somehow ripped them off if they could not fiddle with their knobs 😀
I have sat in the company of decent musicians playing live acoustic music on many occasions, often the sound they produce improves when I consume more alcohol but then starts to degrade as they consume more alcohol 😉
I am yet to hear a hifi which can faithfully reproduce that sound. In my humble opinion it is probably best practice to aim for neutrality when designing decent components for audiophiles, even though it makes some recordings sound dam awful.
But it's probably best to include tone controls when designing mass produced cheap stereos for the general public. They expect it and would probably think you had somehow ripped them off if they could not fiddle with their knobs 😀
> If this circuit rails during turn on
> almost the full 48V may appear
> across at least one of them with
> no real limiting protection.
Yea. I see that.
> almost the full 48V may appear
> across at least one of them with
> no real limiting protection.
Yea. I see that.
Don't get me wrong that circuit could certainly fit in a tiny footprint and probably works fine with careful component selection. Since 24V rails are standard in a lot of pro mixers I could not in good conscience just say today's batch of SK74's worked fine so go for it. At high closed-loop gains there are other issues.
OTOH you could flip everything and use the SJ74's on the input and avoid the Igx problem.
There's the rub ... that's what I'm chasing, technical excellence is a possible by-product of the efforts made ...
Unlike many here, I'm not interested in producing a 'perfect' audio component, whether it be pre-amp, amplifier or speaker, hooking it up to any ol' system and saying, "Well, that's not too bad, listening to that recording ...". Rather, the end-point is all important, the final quality of sound when it hits my ear is the total determinant of success, or of something less than that. The mental process is very different, something like one person wanting a car that has the most powerful motor he can cram into the engine bay, and another saying the car has to be able to achieve 200mph, consistently, whenever he chooses to drive it fast.
I do realise that SY is trying to be friendly in his own special way, but just finds it a bit difficult to express himself ... 😉
My intent is to make sure that people don't mentally kneecap themselves, believing that a relatively low standard of sound is the best they can do, and that a high percentage of the vast reservoir of recorded sound available to them is highly defective in terms of the enjoyment and satisfaction it can bring ... in the words of someone, I think, you ain't heard nothing yet ... 🙂
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I know that these circuits do get measured and trimmed and John @ Millennia has an even bigger supply of the Toshiba parts then we bought. He tries to make good neutral sounding products but sells to recording engineers who select things based on sound. Hence twin topology Tubes or SS. Scott is correct that it is good for effects and that is what these guys pay for especially in tube selection. I think many people want to be told this is a great product (what ever it may be) by someone else and try to feel good about it as opposed to listening themselves or driving or tasting...
I don't quite get the front end problem, but can concieve
the outputs getting overvoltaged.
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