Anyone knows these speakers?

@richardbrand Ok, to make it simpler to understand what I'm saying... There are some SOLID-STATE AMPLIFIERS and VACUUM TUBE AMPLIFIERS that start out in Class A... for the first few watts, and then we'll continue as you turn the volume up into Class A/B to power inefficient speakers. I'm not trying to be technical I'm just trying to keep it simple. I understand what you're saying but that is not what I'm trying to convey in my writings. Basically, what I'm saying is that the amplifier will switch from A to AB as the demand for more power is needed by turning the volume up, be its vacuum tube or solid-state. And to be truthfully honest with you maybe I should have not used the class of amplification in my writings. So, let's just call it Solid-State Amplification. I'm not trying to make it into any technical issue because I don't even get into that filled of the audiophile game. I just have a pure understanding of what works and what does not work. And to answer your question, NO I'm not hinting that it should be heavily biased to class A, but what it will do on its own is transition itself out from class A to class A/B as you turn the volume up. TECHNICAL AND JUST SIMPLY.

GOOD DAY AND PEACE TO ALL.

Minor quibble, I’m pro-tone control and pro-loudness. 

IMHO the issue that is ignored in the video is that graphic EQ’s and many built-in tone controls were not that great.  Even flat, engaging/disengaging the controls often would result in noticeable degradation.  No wonder, the circuits used to implement the tone controls were often 3rd rate compared to the rest. 

Luxman is one company that consistently has excellent and transparent tone controls.  I'm not an expert but I believe in their modern tube pre's they use extra tubes just for these circuits. 

@blackbird55 

I'm not hinting that it should be heavily biased to class A, but what it will do on its own is transition itself out from class A to class A/B as you turn the volume up. TECHNICAL AND JUST SIMPLY

That's what Class A/B means.  The point of transition (the volume level) can be low (the amp mainly operates as Class B) or high (the amp mainly operates as Class A).  In Class B mode, there is switching distortion as the signal voltage goes through zero.  Bias applies a voltage offset to keep the signal shifted.  In pure Class A, the shift is sufficient to always keep the signal away from the switching distortion of the zero crossover point.

Class A/B relies on music signals being high enough to overwhelm distortion at the crossover point.  If that works for you, you will be saving on power bills 

They are Markus Grelka speakers from Germany.  I don't believe they are available in the U.S.  I think they are absolutely stunning.  Love the hardwoods and clearly superb craftsmanship. 

I've not heard them, but having built speakers with the Purifi drivers, I would bet that these are exceptional speakers.

https://www.markus-grelka.de/en/#vita


 

blackbird55

 Sounds great... keep listening. And don't buy anything new unless you absolutely have the need to. DON"T CHASE THE DRAGON WHEN YOU ALREADY HAVE THE FIRE AND SPEED OF THE HAWKS  ENJOY

I f'king love it. 'Don't chase the dragon...'