I never got down to that level. But here is a couple short reviews.
https://www.positive-feedback.com/Issue36/shakti.htm
https://www.audiokeyreviews.com/the-reviews/shakti-stone-air-online-air
Give one a try. I'd be happy to hear your thoughts.
Shakti Stone
Does anyone have any experience with this?They claim it is noise reduction accessory.Seems like a low cost tweak for only $175.00.