I think so.
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A lot depends on the 'Class A' amplifier. Do you mean class A transistor- maybe, if class A transistor amps do not improve at all in the future- which is unlikely.
Given that class A tube amps will not improve at all in the future :), again maybe.
Overall you will see Class D take over the bottom end of the solid-state market, and make forays into the high end. Since it is not a mature technology yet, price/performance curves *do* suggest that class D will be challenging the current art. But not today. Give it 5 years and lets see if conventional technology does not improve as well.
"Since it is not a mature technology yet, price/performance curves *do* suggest that class D will be challenging the current art. But not today."
The Nuforce Ref 9 is the best amp i owned, and i owned a few from Pass, GamuT, Krell, Conrad Johnson, Tact etc...
I know one guy who sold his 25.000$ pair KR Audio Kronzillas for a pair of Reference 9.
You cannot say that it's not mature.
The Nuforce Ref 9 is the best amp i owned, and i owned a few from Pass, GamuT, Krell, Conrad Johnson, Tact etc...NuForce has revised their Ref8 and Ref9 amps four times that I know of in the last year as corrections for problems are made. This does not point to them being a mature product, but rather a maturing product.
UcD = Universal class D. which is a technology, not a company, invented by the man who wrote the article I linked to.
I think Bruno was much too pesimistic, a couple of companies have purchased a license to this technology and I'm sure there will be more to follow.
Some will want to make their own audiophile grade class D amps from scratch. Can you imagine ATC deigning to license technology from another company?
BASH is a digital switching class D based architecture developed by a company named Indigo. Several manufacturers have licensed it. Polk is now using it in their LSI subwoofer.