Never tried them but some reviewers seemed to love them back in the day and I know some manufacturers put their stuff internally in gear.
The Ultimate in Smoke and Mirrors? BUT...
Because I am an incurable tinkerer and my local distributor had a sale on, I recently purchased two Bybee "Quantum Signal Enhancer".
Has anybody else explored, with their own ears, this device? I'm not interested in theories, only personal experiences.
BTW, I've just ordered three more...
(Thank you in advance for your contribution.)