Class D amplifiers don’t do a good job with high end speakers with loads less than 4 ohms. They don’t put transformers that are big enough in most of them so, go back to listening to your cellphone dongle and read some more marketing hype and you can act like you know what you’re talking about.
That's indeed why they like it for the wrong reason. There's nothing wrong with 'breaking up the signal', if you can reconstruct it without audible artefacts. Class AB can do so. All digital audio is also about 'breaking up the signal', and reconstructing it.
These days all PA amps are class D. They run thousands of Watt's continuously into <2 ohm loads for hours non stop. Show me a class A amp that can do that.
Krell ksa 300s and you’re talking about a PA amp? That’s like comparing apples and oranges. What Hi Fi equipment could you commonly use as an example.
What? Even my 1.5 decades old Class D amp can drive 1 ohm loads just fine:
Most amps nowadays don't use massive transformers anymore but opt for an SMPS. These things can deliver massive currents with high efficiencies in a small and light form factor. And some of them are properly regulated as well. They do have an issue with maximum current delivery though. Where a transformer will saturate and sag, an SMPS will often have less desirable behavior.
This one for instance. Want more? There is a 2kW model as well, it will do 2kW into 2 Ohm.
It's pathetic! It would land the thing in the bottom 3 of the ASR amp SINAD chart. Even the 1W 8R figure is only 72, which lands it just outside of the bottom 10 of the chart.It is choice. People will give up power and possible distortion for Class A amps. Company like Gryhon, Pass Lab, Boulder will continue to work on this design rather than Class D. Benchmark AHB2 or Genelec 8361A isn't gonna be end game for ASR.
You were not talking about a specific Krell amp but class A versus D in general.
What 'possible' distortion? Distortion can be measured without a problem.
Both, was talking about Class D amps in general.
This is ASR, provide evidence of this claim... put up or shut up as they say.
You seem to have a problem understanding what play the ball not the man means. It is clear now with these personal attacks that you have an agenda here... poor form.
Please... feel free to start a new thread then and we can all discuss it in detail.
Even measurement will be tolerance and can be calculated, well that another big topic.
What does any of this mean?
What about it, have you heard it, have you compared it, Ken Rockwell likes it so much, he put it up for sale, most likely a very good vintage amplifier, that is all.
It's design and not the classification what makes or breaks things. That goes to the extent that class G-H are not class D which people (including around hire) fail to understand. That's a top design in every way (measurements and looks).
The more you hitting the measure limit of the measuring tool like LCR, VI meter and even scope, higher the error of those meter. The most simple case is analog measuring of resistance. All analog meter will have rating like mega ohm or tens of mega ohm internal rating. You have to take a meter internal rating and test component. In extreme case, if you have 1 mega ohm test sample and you test with a meter of the same internal resistance, you can have about 50% error. Of course this is not how you calculate it actually. In real world, this meter will offer much lower resistance range for you to test on. I don't do calculate the error range at all, even I was taught in polytechnic.I just used the meters that is validated by my company. This kind of work is for designer or research.
In this context, absolutely nothing.
Even if it were true, so what? Measurement equipment used to measure these amplifiers as Amir uses can measure still beyond what any amplifier does and in fact approach the thermal limit. So this issue would not even come up. We haven't seen Class A amps yet that do better than the AHB2 distortion-wise.
