Something on top of a speaker=okay?

@ibmjunkman regarding air pressure, probably not at the slight natural range of pressure differences here on Earth. However, long ago on Skylab (1973-1974), where they kept the pressure at 5 psi of pure oxygen, the sound attenuated quickly, causing the astronauts to have to yell at others located at the other end of the thing where the Apollo Telescope Mount controls were located. I think studies were done on frequencies lost (mostly the highs) from the low pressure.

Today though, the ISS keeps its pressure identical to Earth’s sea level, so they don’t have to contend with that.

I would wonder if the relative humidity would make a difference and whether that difference was audible?

To effect the sound good way the dog has to be at least 30-50lb of weight:)))) in some setups heavy weights on top of the speakers could help fighting vibrations and stabilise the speakers. Probably it could be useful if the speakers are too light or the floors are too curvy. 

Batteries on the cables! I got it all wrong. I thought you put them on top of the speakers. Geesh , now I can get those car batteries off the speakers. My wife will be so pleased. 

I have dust on top of my speakers. From time to time I use a leaf blower to remove it. This also helps rearrange the room. It’s very important not to point the blower up as that could rip down some of the tin foil on the ceiling.

Cables? My learning disability has me going through a series of trials using tables, stables, and gables. I fell off the roof twice trying to utilize the latter. Now, I’m trying to get a handle on whether to put girls in front of the baffles or leave them there. So far, my girls have not been particularly cooperative around this endeavor.