To be blunt, I’m skeptical of any system that’s sensitive to minute differences in cables, assuming they are low enough resistance to realize the full potential of the amps (speaker cables, power cords), or of decent quality (interconnects) to get the signal to them. This is a sign that something’s wrong, such as improper grounding, impedance too low at the destination, impedance too high at the source, inadequate shielding, bad connectors, etc.
If we are being blunt then I would have to say that I am skeptical of any gear made by a manufacturer that hears no difference in any of those things. I wonder if you have heard your own gear. By that I mean, if you make a change that you feel might be an improvement in performance then how do you know if it sounds better or not? If you can't tell the difference in speaker cables then how do you tell how much bias to apply to an opt amp for it to sound its best?
On this subject.... I had a company call me (big well known company) that designs play back software. And they really wanted me to use their playback software on my computer at shows, and as a reference for demo's etc. And they were of coarse offering it for free. They wanted my endorsement. So I asked them what types of DAC's they used during their evaluation process. And what their references were. They sounded puzzled. You mean for D/A conversion, they asked? Yeah, what type of DAC do you use? Ah, I guess its an HP, they replied. HP, I asked? Yeah, just whatever is in the computer, they relied. So you are just using the computer sound card for D/A conversion and playback? Yes, they said. Okay, that was all I needed to know. No thanks. They had no idea how their own product sounded.
If I choose to build some battery powered Cherry Amps, I want to hear them myself first. I want to measure them as well.
I like that statement. I measure everything too, but listening is the final determining factor. In the end, it has to sound good. that is what all of this is about.
I don’t believe tremendous available current is necessary. It’s not as simple as just hooking up batteries, in the case there’s no DC/DC between them and the amp, but not rocket science either.
I thought that too as did others that I am close with that built off the grid gear. But then we found big advantages in dynamics and drive when using huge 100 amp hour batteries even when we were only powering a mac Mini computer on it.
Anyway, I’m still wondering if it’s worth the trouble because the Maraschino, for example, is a very high performance amp as-is, and we’ve tested (including lots of listening, of course) with several different power supplies already.
I don't know. I can't answer that for you. What is R & D really worth?
So, if only 2 people will ever buy a battery based power supply, it doesn’t make sense to spend the time/money to develop what will be yet another option, thus complicating the product line.
I don't know. If it sounds better will people want it? First you have to conclude if it sounds better.
For me it is all about if it sounds better or not. It has to sound better or I don't offer it. I sell a lot of kits that are budget oriented as far as price goes. If I felt that they didn't out perform anything else in that price range then I wouldn't offer it. However, I offer upgrades for those kits that include higher quality caps, resistors, connectors, and internal damping material that handles resonance control. It is a pretty significant upgrade in performance but it cost more. Most of my customers spend more to get more. If it wasn't worth it I wouldn't offer it. If it cost more money then it has to be better and worth it.
In this case you might design something that sounds better and it cost less.
We went through something similar with a linear power supply for Maraschino amps. We sold a few, but interest was light, and it wound up fading away. It was a good power supply, and super heavy for its size, but resulted in lower power output. Other specifications were the same, and so was the sound, except when large peaks while driving difficult speakers (Mags) were too much to handle. Meanwhile our standard 60V 1kW switching supply powered though the same tracks without a sweat!
Sometimes you don't know until you try. Sometimes R & D cost is high and doesn't get you anywhere. Sometimes you find a break through.
You also have to be able to tell the customer how something sounds by comparison. So for instance how did the linear power supply sound compared to the switching power supply.
By the way, what are you using as a reference playback system. Can you provide any pictures of your reference listening system and room?
And I hope this is productive in some way for you. I really would like to help you.