What’s your vote for the most ridiculous, overpriced, and useless tweak?

Yes the treatment of the room is the most important tweak for any audio system at any price... After that the cleaning of my electrical room and house grid and audio grid with varied stones and crystals... Last but not least the treatment of mechanical vibrations : I use simple very low cost material with a success without defect...Sandwiches consisting of one granite plate on 4 little feet of quartz, sorbothane on this plate with another granite plate where I put cork plate and finally a bamboo plate with sorbothane under the speakers...The same sandwiches under the dac and under the amplifier... All is crystal clear with that bass included...But I have also treated my speakers with sorbothane and stones and heavy damping with a concrete mass ...


At the end my audio system plays at his peak optimum, I know that because there is absolutely no comparison between the same system before and after all that...I am proud of the fact that my amplifier(100 bucks) my dac (50 bucks) my speakers (30 bucks) had a sound that make me jealous no more of my friend magneplanar system...The cost of my tweaks exceed the cost of my vintage system,but is far lower that a new piece of gear and without that my system is not on par with my dreams at all nor with reality if I compare it to the magneplanar system...

This thread has turned in an unexpected direction.
Tweakers unite!

My system, even if the sound is wonderful now, is very low cost audio system, then almost all tweaks are for me overpriced...They are ridiculous only after I have try them or replicate them if their use is revealed not useful...They are overpriced tweaks that are very useful, resonators for example, it is simple to replicate them at low cost...

Side note: there are many materials, I oft pick on Sorbothane not unfairly, but others,too, that are either sold as viscoelastic material or marketed as audiophile material that actually do more harm than good, even if there is some constrained layer damping going on there can be some energy storage going on too. The objective is to interfere as little as possible with the rapid exit of vibrations from the system whilst disallowing vibration to enter the system from the floor. I’ve oft talked about the necessity for a comprehensive plan of both vibration isolation AND resonance control. Many of these so called viscoelastic materials over do things, and even though you might admire your handiwork, you’ve committed yourself to a life of over damped sound. It’s what Acoustic Revive calls in their badly translated marketing literature, over-dumping.  

You are right Geoffkait , isolation and resonance control are 2 things and different things to clean and control... In my case the sorbothane duro 70 (other duro are problematic for me) is glued near the drivers speakers and under the feet and it seems to control resonance with success...The 2 granite plates + bamboo+cork+quartz seems to isolate relatively well my gear...It is not perfect but the difference are so great that I stuck with that...Cost is King in my sonic country...