I agree, completely. THD 10kHz might be interesting as well. Numbers below 0.001% must always be validated with a prototype. Otherwise it may get to 0.03% very easily. I know what I am speaking about.
https://pmacura.cz/audiopage.html
Come on everyone lineup is just freestyling, cut him some slack, at least he was honest in post #1 putting out a clear disclaimer he's only simulating and not intending to build it. :)
With regards to the distortion numbers, I don't know maybe it's some setting or limitation in his spice version that truncates the numbers?
With regards to the distortion numbers, I don't know maybe it's some setting or limitation in his spice version that truncates the numbers?
Yes but there was shown very little of the simulated result. If LTSpice or MC file would have been posted, then everything was OK.
All that had completed simulate -> build-> measure circle, already know.
However, build execution can affect distortion result by order of magnitude (or two). Not to mention that Spice models are incomplete in comparison to the real components. You can be very close or very far with real circuit results. In example, my amplifier simulates as 0.00004 % at 1W/8Ω and latest measurement with improved and recalibrated gear is about 0.00007 %. This is not general measure how close to real life simulation is.
+ 4 or 5 more uncertainties inc. who measured and with what. In this case it isn't even a complete amp - power is missing.... just non-sense...
Lineup - how do you think you can do an evaluation of the simulation tool vs reality, with this strategy - pathetic. And there is nothing to be investigated - everything that is in need to be understood is already done.
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Lineup - how do you think you can do an evaluation of the simulation tool vs reality, with this strategy - pathetic. And there is nothing to be investigated - everything that is in need to be understood is already done.
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PCB design is an inseparable part of any electronic project. You add parasitic impedances, coupling impedances, voltage drops, EM capture. It all should belong to a simulation and it does with professional tools.
I found this thread quiet interesting. I am not an electronics super guru like many here so I found it interesting - and I like to build amplifiers.
I was even tempted to try it out by quickly making a PCB with a small group of people and try it out. But when reading all those rude comments here, I think it is not worth. Probably a huge shitstorm is coming over me when I publish something. It is a pity that one of the last forums I always like(d) to visit is showing more and more harsh comments. Maybe I am getting too old. Sorry for the off topic. I am out.
I was even tempted to try it out by quickly making a PCB with a small group of people and try it out. But when reading all those rude comments here, I think it is not worth. Probably a huge shitstorm is coming over me when I publish something. It is a pity that one of the last forums I always like(d) to visit is showing more and more harsh comments. Maybe I am getting too old. Sorry for the off topic. I am out.
I think it could be a nice little amp to build.
A simulation would need to be expanded to see how stable it is (open loop phase margin and gain margin),
perhaps zobel needs to be added, etc.., but it's definitely something that can be built, and it will work.
Actually, it's simple enough to build it on a breadboard, at least the 1st prototype.
A simulation would need to be expanded to see how stable it is (open loop phase margin and gain margin),
perhaps zobel needs to be added, etc.., but it's definitely something that can be built, and it will work.
Actually, it's simple enough to build it on a breadboard, at least the 1st prototype.
I had a feeling U10 was going to end up in this circuit, the distortion would go down another 10 times, and the naysayers would show up quickly. I have to admit being afraid to build it myself but want to. It might be pretty nice with regulated supplies and 3 inches of wire between it and a tweeter coil.
