What are all these metal cans/pods sitting on top of electronics?

I use 1 pound bags of cannabis.

I found that a sativa gives the speakers a more lively, energetic presentation.

While an indica presents a more laid back, relaxed sound.

It's really up to personal preference.

😌

I mass load my tiny novo headphone amp with a decorative bronze statue of a mermaid sitting on an amber colored marble base, very nice looking and heavy. Only reason is the amp is light weight and tends to be pulled on by the interconnects. Now its steady and planted like a rock. Does it sound better? Hell if I know.

I use a small cylindrical vial of Higgs bosons on top of my equipment for mass loading.

One of the cheap tweaks I would use was to open up a cheap CD player and coat the inside walls and top with plumber’s putty. It would add about a kilo of weight to the CDP and dampen (reduce) the vibrations.

On most players it would make an immediately subtle, but noticeable, difference.

@spencem - I hope your vial holds a lot of those little suckers....  
At 0.000000000000000000000000223 kg each you might need to mass load your mass load.