Strangest Tweak?

There is only one way to find out. You have to give it a try. You can read all the manufactuers scientific methods (or BS) on why their's is the best. It won't tell you a darn thing on how it sounds. To think that some people actually swallow this garbage without trying, has no credibility with me. There are some tweaks that will give more importance in sound than a piece of gear. Yes, there are some snake oil products. Some you have mentioned will work for some. Others will tell you that this is snake oil. please do not underestimate the importance of certain racks, shelves, outlets, room, PCs, and dedicated lines. Only you can determine what is snake oil and what works.

CD demagnetizers trip my BS detector, though some swear they can hear the difference.

Waterford Crystal Goblet Tweak

KF

The strangest tweak that works well is the Shakti Holograph room treatments. Don't ask me how or why they work, but I heard a Demo at CES and was amazed at the improvement in soundstage, focus and resolution. Weird stuff, but as I said, it works. They'd rotated the top section back and forth, to demonstrate fine tuning capabilities. They also would remove them and cover them, which showed even more what a difference they'd made. Snake oil? Not if they improve the sonics of your system.

Just my 2 cents.

Take a pair of old speakers place them in the corner of your listening room, NOT hooked up of course, ...how will this improve sound on your listening speakers?????????!!!Strange indeed!