Krell anticipator circuits of the 1990s

My favorite sounding Krell monoblock amplifiers to present day are the Krell MDA 300. I think the quiescent current per monoblock is 400 watts.🤒 😎

Mike

 it sounds like you have already decided that Krell's plateau bias technology is just marketing BS. I read through the patent in detail and, as an EE, I do think it's a clever approach and not just hype.

Totally agreed. 👍

The same can be said for class G and class H topology.

@jaytor ​​@imhififan      Well, if you read my first post you will have seen I do not believe the claims made.  I decided that in the 90s when the FPB amps were introduced.  I examined the proposition and discussed it with a Krell service engineer.  I do not believe the current of the signal can be determined and the bias changed before that signal is amplified.  I am not an EE but I have read the patent and it says nothing of the quantum of this time delay.  If this is not known then the system's suitability for audio use cannot be approved.

Amplifiers have very many functionalities apart from audio and Classes B thru H have their valid uses where their differing topologies suit the required functionality.  But for audio amplification none can deliver the sound quality of Class A.

"it sounds like you have already decided that Krell's plateau bias technology is just marketing BS. I read through the patent in detail and, as an EE, I do think it's a clever approach and not just hype."

Then as an EE you also recognize each effort to modulate the power supply models as a non-linear s-curve - a hysteresis loop with rose and fall times that must be less than any changes in the input signal. 

 

 

 

@clearthinker there is something  to  be said about owning  your amps for many years. First off you know them very well. Secondly  you  are off the rat race to continually  buy and sell. In my opinion  it takes a bunch of time  to get a system  at its peak. That is not in a month or two. That takes a few years. You can get them fairly close in a few months  but top performance  takes time and effort and listening.  As you eluded  to before many times the biggest effort  is put into early products.  When the person who formed the company  was in control and had the passion  for what he was making long before the bean counters  were there.  As far as time goes most everyone who plays with stereo  equipment  at this level works very hard in what ever they do. Most blue collar people think that the wealthy  are lazy that is far from the truth more like some of the hardest working  people out there. So that also brings up a couple of points spare time is limited  so what does a person  get there happiness  from in audio,  listening  to music  or discovering  each new piece that comes out?  None of those things are bad but a person  wants to get enjoyment  out of the hobby and that in a nut shell  is what the goal is. I always maintain  that what a person is doing is trying  to paint a picture with your hifi system.  There is no right artist just different  styles just because  a person's taste is a monet  doesn't  mean a DaVinci  is bad. I love hearing  other people s choices  as it is a view into that person's soul it shows in ways that people rarely show you. What makes me enjoy this thread is the passion  that many people are showing that is one thing that is wonderful  about this quest is it brings out passion.