Audio / Stereo Rack

@onhwy61 “…Wouldn't they be better placed right next to your loudspeakers?…”

+1  They will sound better next to the speakers with a very short speaker cable. Also, not sure of the rest of your component locations… but for most (although not all) speakers they sound better without component stands in between them. 
 

I’d make sure your placements are good before committing to high quality stands. In case you haven’t. I got some inexpensive heavy steel audio stands and experimented before committing to good quality ones.

@emergingsoul

Casters are not provided because they degrade the sound. Typically spikes are standard.

Salamander is a consumer brand… so, they expect low end components that are standardized in size as opposed to high end amps.

There are lots of high end audio rack companies producing amp stands designed for high end amps.

I found improved sound with a solid amp stand. Support and vibration control seems to improve all audio components, although to various extent.