Lots of clean gain and no noise in a tiny package—what’s not to like?

In addition to certifying the performance of commercial cinemas and consumer audio and video products, THX also develops new technologies and licenses them to various manufacturers. Among these new technologies is the company’s ultra-quiet AAA (Achromatic Audio Amplifier) power-amplifier design, which first appeared commercially in the Benchmark AHB2 in 2015.

Two years later, THX introduced the second generation of AAA technology, this time intended for headphone amps. I first heard some prototypes at CanJam SoCal 2017, and I was quite impressed. So, when Helm Audio announced at CES 2020 that it was implementing AAA technology in a mobile headphone amp, I immediately requested a review sample.
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https://www.techhive.com/article/3572601/helm-audio-db12-aaamp-review.html