Another speaker stand build

mdaudioguy wrote: »

westmassguy wrote: »

F1nut wrote: »

Because that is the recommended method. It was explained to me once in great detail by the owner of a speaker company after which I was convinced he knew what he was talking about.

It seems counter intuitive to me.

Hmmm, I don't know much, but my theory is that if you couple the speaker to the stand (or shelf, or whatever), any resonance created by the speaker is transferred to the other object and has an effect on the sound. Since the speaker designer has no idea what the speaker may be in contact with, they can't account for it in the design. By decoupling the speaker from the stand, you only hear the speaker. Maybe that's a bunch of bunk, but it works for me. Based on all the solutions out there, it seems like it's common to decouple bookshelf speakers from their stands, so that's the model I'm trying to follow. I guess it can't hurt to experiment, however, so maybe I'll try and evaluate both options.

Nope, that's basically it.

It's about the transfer of energy.

It's also why you add mass. You want your stand to be like setting the speaker on the ground. It doesn't have enough energy to vibrate the earth. But it might for a stand (hence the reason I used black pipe for mine). So you make the stand heavy/dead enough that the speaker behaves like it's sitting on the ground.

Two ways you do that.

One, mass. Make it big and heavy so that the speaker is incapable of vibrating it.

Two, density. If you can't make it big and heavy, make it dense by adding damping material like sand or shot or even concrete. That will make things pack real tight in the voids and that makes all the dissimilar materials act like one big damping apparatus. It will tame the vibrations and kill any resonances because the different materials have different resonance points. Those points overlap and they cancel each other out...well more like damp each other. It's the whole idea behind Polk's Dynamic Balance tech.

Anyway, by decoupling the speaker from the stand, you further reduce the transferred energy. Transferred energy is wasted energy and it can detract from the performance of the speaker. If the speaker moves around when playing then there is energy going into moving the speaker instead of playing sound. If the speaker is on a stand, it might not be moving around but it might be moving that stand and wasting energy moving the stand. So make it so it can't move the stand and further help it out by making it so it can't physically act on the stand because of whatever damping material you put between it and the stand.

It's not a perspective, it's physics. There's actual science around it.

Jstas wrote: »

It's not a perspective, it's physics. There's actual science around it.

I wasn't questioning the science.

Loving the T screws, that's a super clean look.

Well. that's just great, now I'm going to have to write a fictional story about "Ed Stands". Thanks for ruining next weekend for me!

Nice stands, very professional looking.

Very nice!
I too can never throw surplus parts away, as there is always a use for them. Every so often I get vindicated by not having to run to the store to pick up an esoteric fastener or something. Well done sir!

BTW, did you paint the oak, or stain it?

I might have missed it in a previous post, it's been awhile since I read this thread, but what are the two holes for in the top plate of each stand? Are the speakers bolted to the top plates, similar to a "Foundation Mount"? Also, is the wall the same color as your shirt?

mdaudioguy wrote: »

The walls are probably in the same spectrum as my shirt, but this pillow is a closer match.

When you stand against the wall I bet you look just like the killer that blended into the wall in the movie "When A Stranger Calls Back".

Nice job man! I might make myself something like this if I ever get some nice bookshelves... great idea.
Once again, good job!

mdaudioguy wrote: »

satin black!

WHERE!?!WHERE DID YOU GET IT!

Give him Eskimo kisses?