Gallium Nitride GaN Class D Amplifiers

My question is, why? I do not think other amps are embellishing the sense of power and scale. I am wondering what it means that GaN is not accomplishing the same? Is it more accurate? Controlling the drivers too well? 

The sound is as good as anything I’ve had but the bass is light compared to others...or is it more truthful? I think it’s tad light but everything else about it is spectacular

@bhvf I've heard a lot of class D amps that were light in the bass. I have a hypothesis as yet unproven which is that many designers think that since the amp is so efficient that they don't have to have a beefy power supply. IME a beefy power supply is pretty important since the amp's current draw can vary quite a lot and the supply must be able to handle it with no worries. 

@izjjzi The 'sound' of any amplifier has more to do with its distortion signature than anything else. If you know this then you also know as a designer to keep the distortion spectra (which is very measurable) as benign as possible.

If you get all the parameters right class D will have just as much impact in the bass as any other amplifier class. GaNFETs are not any more 'accurate' as they are switching devices. The design and how well its executed is what is important.

On my GanFET Audions the bass was so impactful that I had to disconnect one of the two hot wires to the REL S812's. This was advised by REL if your system has so much bass that is cannot play louder than position 5 on the REL volume knob without creating excess bass.

No experience with Orchard or AGD, but I owned a pair of Atma-Sphere M-60s for a number of years, fully upgraded to 3.3 including V-Caps. After procuring a pair of the Atma Class Ds, the M-60s were sold and I've never looked back. The Class Ds are smoother in the top end, have better control of the bass, and are equal in the midrange, all of which is high praise as the M-60s sound great. I don't at all miss the heat output or the 24 tube anxiety of the M-60s; the Class Ds never even get warm, and I can leave them on all the time.

Speakers are Zu Druid V, which I've driven with 2 watts but sound way better with 50, regardless of room size.

@atmasphere Respect and regards to you and to Alberto.

Please, it is not bass I am referring to but low-end reverb(?). The two tracks I previously mentioned involve a synthesizer and organ, not bass guitar or other. I own a pair of REL 212SX and yes, Billy Eillish tracks and others hit my chest like a truck. What I am describing is the emotion of deep notes, resonance (reverb?) that you can feel. My Accuphase A36 and PASS LABS x260.8s knocked those tracks out of the park, but were muted... benign with GaN. If this piece can be solved by GaN amplifier manufacturers, GaN will be my last stop. That said, I will soon be auditioning a new player in the GaN space (ArgentPur) some time this month or so.

@izjjzi I can't speak for other class D designs. The sound varies from one class D to another more than it does with class A amps or tube amplifiers- IOW quite a lot.

But I know how our stuff sounds.

For reference I use LPs and CDs that I recorded- which helps since I know how they are supposed to sound. The bass issue you seem to describe doesn't sound challenging to me- I also play bass and keyboards (most of which are old school synthesizers) if that helps...