Do grounding boxes improve sound?

Several accessory companies manufacture and sell extremely expensive ground boxes and this customer wants to know if they work and why. Paul says it doesn't matter if they work or not, there's a bigger issue at stake. Have a question you want to ask Paul? http://www.psaudio.com/ask-paul/

I am getting close to publishing my memoir! It's called 99% True and it is chock full of adventures, debauchery, struggles, heartwarming stories, triumphs and failures, great belly laughs, and a peek inside the high-end audio industry you've never known before.

I plan a few surprises for early adopters, so go to https://www.paulmcgowan.com and add your name to the list of interested readers. There's an entire gallery of never before seen photos too.