Class J Amplifier

[stephgirl 10+ year member]

So i was watching a video on YouTube about CES show and in the far background of the video was Earthquake Sound. Humm I remember them.
I have not heard of them in years. So curious I looked them up and I found they had a class J amplifier.

Home - Earthquake Sound Corp.

For over three decades, Earthquake Sound has led the audio industry with high-quality audio products that resonate with audiophiles worldwide.

earthquakesound.com

So anyone know anything about them lately or have any experience with them and what is a class J amplifier?? Earthquake say they are real efficient amps

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[n2audio 5,000+ posts]

Don't know, but it's not new. Their big mono's have been called class J for at least a few years.

Class J doesn't look to me like it's an actual amplifier classification. Just something they came up with to sound special when talking about their big class D's.