Class D Technology

 New class AB amp from Benchmark ABH2 also utilizes SMPS resulting in 132dB dynamic range.  

They had to cut costs somewhere to hit that $2995 price point. The dynamic range and THD numbers, while appearing to be unusually good, may be partly the result of using too much negative feedback. I've never heard this amp, but too much negative feedback and you can end up with a soulless amp.  

I've heard the Benchmark amp and was very impressed. 

Ah I see now glofi .    Let us know when you get it right.  

THD numbers, while appearing to be unusually good, may be partly the result of using too much negative feedback. I’ve never heard this amp, but too much negative feedback and you can end up with a soulless amp.

You’ve got that right, anyone who’s had an amp that’s had feedback level control, knows that too much can lead to worse sound, minium is best if you can keep the bass tight extended. I put them on all my tube amps that I made, to do it on s/s can be dangerous.

Cheers George

     I've read about all this supposed noise produced by my class D monos due to their SMPS rather than a typical analog power supply and all the noise produced in the audible band due to their switching frequency being too low. However, the only noise I can actually hear is from claims of all this class D noise  that no one can hear.  
     I'm no scientist but I understand the difference between theoretical noise and actual verifiable noise and that, empirically, only the actual noise can actually be heard. by us humans.  Noise needs to be heard to exist.  
     In my experience, and apparently many others experience, class D amp noise is being exposed as a myth. I have yet to hear from any class D amp listener or user hearing any noise issues.  In fact, I have yet to hear any descriptions of how this theoretical noise would audibly manifest itself.  

   I'm trying to keep an open mind but I'm not going to believe in dragons without at least 1 charred sheep or human.


Tim