Effects of concrete as base for subs, speakers and potentially equipment


Hello, 

 

I am looking for any advice and experience from those that have used concrete as stands, racks, isolation. I have a friend who makes functional art pieces from concrete, coloured and designed to your liking and I was thinking of having some pieces made up for my equipment. I currently have everything on wood, but would like something more pleasing on the eye. My room is well dampened with wood floors. I am after any experience that you might have experimenting with concrete.

subwoofer on concrete slab. Currently have a T9x with a downward throwing passive radiator on a suspended wooden floor.  It needs removing from the floor and I was looking at concrete slabs. 
 

speakers on concrete slabs. Zu union 6 supreme again on suspension floor. They have isolation feet but they could do with lifting higher. I am considering using concrete for this. 
 

finally the equipment. Amp, dac, streamer. Currently on a cheap wooden cupboard with chopping boards underneath. Any experience of electronics on concrete. 

mpoll1

Sometimes more weight on the top is the right answer.  Reduces back and forth rocking caused as a response to the woofer motion.  5-10 lbs on satellites can really tighten things up.

Thanks @erik_squires i have loaded weight on top, but the hollow under the floor is pretty significant. I have it on a wooden platform now and that helped a lot. 
 

This is as much as playing with form as it is function. I won’t keep anything that makes it worse- I would however like to avoid any pitfalls. I don’t want to get anything made up for me that is immediately wasted. If it works I am considering some much larger blocks for the electronics. 

Bare concrete is porous and can result in “flabby” bass response. Expoxy coated concrete works much better. I’ve used both with 3 way floor standers. Good shelves/footers also help tighten up the bass. Jeff