Vibration Control

In home audio you are beset with so many vibration issues created by playing music it's really best not to listen to anything. It's simply not worth the risk. 

@nonoise 
I do have some experience putting high end recorders and microphones in violently shaking environments in my recording career. When you put a recorder that is solid state with no moving parts you don't have to worry about vibration. In the days of Naga reel to reel recorders you couldn't use them in a race car or a roller coster simply because the Gs would cause the tape to unspool, DAT tapes wouldn't work in race cars or roller coasters either because they had moving parts. But when solid state recorders came out we could put them anywhere even on jets and other high G environments.  

Consider powered speakers with DACs, amps, crossovers, network circuits inside the speakers. Powered speakers are the norm in recording studios all over the world if vibration is so clearly detrimental in sound how can recording studio monitors be internally powered.

@donavabdear 
Was the gear you placed in violently shaking environments off the shelf gear from some audio saloon or Best Buy or were they built to spec to withstand the event?
Were there brands that performed better than others?

I remember when touch controls first came out on washing machines and dryers and the failure rate of the controls was high due to the shaking, spinning and vibrations that ensued. They had to go back and better isolate the controls as well as build them to higher specs to withstand the NVH.

As for powered speakers, there are many designers who frown upon DACs and amps in speakers due to the vibrations from the speaker cones and some, for the longest time, have constructed their crossovers to reside outside of the speakers for the very same reasons, long before they started jamming other junk inside. 

All the best,
Nonoise

@nonoise 
I used the very best professional recording equipment at the time including Nagra, Fostex, and Zaxcom, I've spent millions on sound equipment for location recording. Only the Zaxcom recorders were solid state they were the first  company to have a completely solid state recording chain including being able to record in the wireless transmitter itself fully solid state with no moving parts. With the solid state recorders you could subject them to vibration like jets cockpits and rollercoasters and drag race cars

I think you are mixing up some important factors on the effects of vibration on sound quality. If there are moving parts in the equipment or circuit vibration of course is detrimental to sound quality because of mechanical considerations. If the equipment has no moving parts, not even a spinning hard drive, the equipment will not be venerable to mechanical vibrations. Switches knobs anything non solid state will fail with enough vibration. 

Pick up a Mix magazine and look up the monitors used in professional recording studios you'll find nearly all the monitors are powered internally. This means that if what you say is true, that vibration affects sound, there would be a limit of what the mix engineers would hear to make recordings and mixes because of vibration internally in the speaker. I use powered speakers professionally now because only a few years ago the technology to allow very precise monitoring didn't exist. The argument that vibration affects solid state sound is simply false, understanding that vibration affects mechanical equipment is true. 

My personal experience - it is the cabinet and the drivers that are most affected by vibration whereby the music suffers.