Digital input amp

I see a few coming on market.  Previous threads were quite old.

They take a USB or other input. No DAC on the front end. Just the DSP engine to do volume, eq, etc, then whatever conversion to PCM to feed the class D output. So the only "DAC" is the output stage.   This makes sense as it further reduces the functions in the chain.  I have not seen objective testing or any reliable subjective testing. The ones I have seen are Infineon processer based. No idea if the output filtering or feedback implementation is up to the Purify quality.   I guess the next innovation is the GaNFET output.  One has a DAC to feed a sub out. Easy as any old $5 DAC will wo there. 

I was browsing and came across the Sajab A30a. ( quite inexpensive)  Peachtree has the old Gan-1 but coax PCM only.  That would be fine if it managed buffering and clocks internally. Unfortunately my all-in-one only has USB out. 

I suspect there is a lot to be learned here but it makes sense to me for the future. 


Actually, as the Data Systems Architect, Program Manager, and Acquisition Manager, yes I was an expert in extreme scale databases when I retired. Six years later, I am probably an antique. That technology moves faster than SMSL can introduce DACs. 

If you think Gold Note answered your question, you have zero understanding about how an amplifier works no matter how many times you insult me. I do hope they are nice amplifiers, but I will never know. 

"Doubles the power when reducing impedance"   So what. Any good amp can. 

"Switching, but not class D".  OK,  they did not say what it is though.  

"Exactly like class A"   Nope.  Not at all.

"More efficient" Yea, so is class A/B, G, H and D. 

Again, I hope they are very nice. I hope they have some innovation to add, but their marketing BS you quoted does not give any hint and their published specs would not make it on the shelf at Best Buy with the boom-boxes. 

I  just ordered a Schiit Vidar. They have excellent customer service and their web site plainly explains the audition return policy. Their specifications include the test parameters.  For half the price. 

I intentionally live in the boondocks, if you call 1.2 million people in the area the boondocks.  Lots of wildlife in the woods behind me. My camera has snapped coyote, fox, bear, deer, possum, racoon, otter, skunk, owl, hawks, herons, and way too many copperheads. No obnoxious street lights, no kids drag racing up the street at night.  Spread out enough I can crank up my subs without bothering anyone. But only half an hour away from world class medical and a Super Walmart.  I vacationed to DC/Va/Pa recently and hit a few remaining high end stores up there. Kind of like Home Depot, they all have the same generic stuff.  I'll stay down in the Piedmont, thank you. Amazon makes it to my door in a day. 


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BTW it was not from Gold Note Specs, read much. Use google much, no bio please yawn. Should read some of the reviews (what I quoted slick) as they are all positive just like the Schiit you purchased. Go to a show or two, get enlightened.

BS you quoted does not give any hint and their published specs 

Passed on the DC show due to COVID. Maybe next year. 

Again, I hope it sounds great, but I'll never know.  I put zero faith in reviews as if they are not glowing, the reviewer never gets anything to review.   More BS. You have no problem suggesting units I have or have heard are junk, but most of them have outstanding reviews.   I have heard a lot of stupid ego priced equipment I would not trade my dirt cheap JDS for. Glowing reviews or not. 

COVID? Come On Man! Are you Howard Stern? No really if your gear sounds good to you then good for you. Gads you are not the end all know it all as Ralph pointed out. Enjoy your JDS.

Thought you ordered a Schiit amplifier or was that just Schiit.

Please do tell me what I have suggested that you have hear (no first hand experience I see) or heard are crap, slick?.