Class A or Class D solid-state amplifiers (modern designs)


Hey guys.

 

Class A is supposedly superior. Something to do with a conduction angle of 360 degrees...so the entire signal gets processed in one go without crossover distortion.

But in terms of sound quality (subjective enjoyment) is there a benefit to Class A? Can class D provide the same level of enjoyment?

 

The dealer I’m talking to says that really nice Class A amplifiers are designed for "reference quality" meaning completely true to the real life performance.

 

Let’s compare and contrast. Which one is technically better?

 

In other words, could you have equal technical performance and quality in a Class D amp?

 

- Jack.

jackhifiguy

@atmasphere 

@spenav 

Sorry Ralph while I am familiar with your work, I have no first hand experience.  But you are one of the few who manufacturers quality from what I can see.  I remember also using Caddock resistors back in the day also.

spenav - while we have been asked to have our components reviewed many times, we have not had our components reviewed.  I understand that your mom is your greatest fan also.  While we have our opinions on the comparisons, most of my comments regarding the sound of our components comes from people who bring their equipment over to hear with the speakers in our listening room,  Sonus Farber, Horning, Vandersteen, Alon, Dynauido, Klipsch, Verity, Rogers, ProAc, etc.  They come to our listening room to hear the differences.  We also provide upgrade service and repair service.  For example, recently and highly regarded DAC was brought in and after hearing the differences, we were asked to upgrade that DAC.  Same goes for many other components. That allows us to also hear things and we actually learn more of what can be accomplished.  Again, we are not there to pound our chests but to help others improve their systems.  It is very enjoyable to us.

Regarding reviewing our products, we barely can keep up with the work we have now.  Hand made products take time to manufacturer.  It is a labor of love for us.

I hope that I have explained ourselves so that everyone understands that we are in this together and not for us to think we are better than anyone in anyway.  I realized a long time ago, that what we do is really for us first.  We are always learning and improving.  We are always open to hearing new things

 

Anyone who is in the NYC area, contact us, we are more than happy to host a visit.

 

Happy Listening.

 

 

 

 

@tweak1  - thanks so much for your reply - your comparative experience is really helpful to me - at some point I am going to add a GaN to amp mix & owners of the LSA all seem very happy with the choice - Have a great day!

“LSA Voyager GAN 350 wpc class D is a kick ass amplifier.  I have had multiple highly regarded class A amps and tube amps.  Not yet heard other GAN class D amps.”

Respectfully, I owned the LSA Gan 350 and put it in my professionally calibrated audio system. My Parasound Halo A23+ amp wiped the floor with it. The Gan350 did have a smooth grainless top end but it ended there. It did not “project” music like the Parasound did. The Gan amp was boring. Wasn’t engaging I. Comparison. Bass was more muddy in comparison. Mids were more recessed and top end, while smooth and grainless,  was just boring and did not engage. Lacked bite. It also has more hiss when I cranked the volume with no source playing. I tried to like it but it wasn’t to be. The Parasound remains in the system. 

I recently purchased a pre-owned Classé Sigma Amp2 (class D) in mint condition to pair with my B&W 802D and am really enjoying it. I got a great deal ($1,300 - MSRP was $3,500) and it tested favorably in all reviews it was featured in. Anybody else have experience with it?

AGD Gran Vivace owner here. After 30 plus years I have found the amp to run with my Don Sachs pre or others (ss and tube pre's) The AGD powers Spendors to Spatial and Tetra speaks.