Tweaks such as demagnetizers ionizers for lp's

Hah! More like Qfwfq (Calvino's little protagonist in 'Cosmicomics').

"One day Paul and I were sittin' on a light beam..."

Those are nice and all but first start with as CLEAN an LP as possible. I recommend Disk Doctor and steam cleaning. Even if ou can't afford the Disk Doctor solution and brushes at least steam clean your vinyl using decent (Aquafina or battery) bottled water. You would be AMAZED at the sonic improvement that steam cleaning an LP has. OF course see Charlie Rehm (or posts/articles that he has written) if you do not know about properly steam cleaning LPs.

I agree, the difference made from steam cleaning is very audible.

Considering this handheld demagnetizer is both a magnetizer and a demagnetizer, I am wondering if you need to press the button to demag or just have it plugged in?

Want to try the music direct one on my CDs and LPs. Sounds like a pain to disconnect all the cables to zap them also but will give it a try if it works.