OT: Mike Engelhardt's portable audio system?

QSPICE
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Hello, all,

Sorry for this Off-Topic post, but I couldn’t find any other way of getting in touch with Mike Engelhardt and thought I would try through here.

In this article, Mike described an audio system that he designed and built, as “my own PA system: a Countryman mic, active equalization, Class-D amplifier, and a sealed line source speaker.”

I was hoping to get some details about this system; schematics, specifications, building drawings, etc. Has anyone ever seen any details about Mike’s system? Is there a better way of contacting Mike than just throwing this note out into the void? Would anyone at Qorvo be willing for forward this to him?

Thanks for any advice, and for your patience with this Off-Topic post.

-Kevin

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Mike.Englehardt@qorvo.com

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Thanks so much, @Michael_Kiwanuka. I’ll write directly to him.

-Kevin

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Screenshot from 2026-10-13 14-20-10
Screenshot from 2026-10-13 14-20-10594×282 12.8 KB

Oh, well… Any other thoughts?

-Kevin

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I’ll check with him, he’ll be using it at Electronica

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Thank you (very much [meeting the 20-character minimum]). -Kevin

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There is a typo in Engelhardt. To contact Mike, his email can be found in Qspice > Help > About Qspice.

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Thank you. I didn’t think to look in the Qspice application itself. -Kevin

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