It's a subject I don't totally understand -to say the least, since it can be very technical. But I want to learn to do it right.
First, here are 2 great threads about the subject, covered mainly by Thomas JJ/Northward. All quotes from this message are from these threads.
Does speaker stand quality matter?
Testing Loudspeaker Isolation Products
If there are other threads I missed that could enlighten me please, post them.
Let's resume the most basic thing here (please correct me if I'm wrong):
- The first thing is to have the heaviest stand we can get (to get some MASS)?
Is it to reduce mechanical transmission of vibrations?
More mass = less transmission?
Thomas said
- "Low budget: go for Blu-tack and DIY damping!"
[...]
- A key to having all this work well is to also make sure the surface the speakers decouplers are resting on is as stiff as possible"
[...]
- "Sylomer and springs + dampers remain by far the best products to use but need fairly heavy loads. With properly implemented systems, you can have a natural frequency as low as 8Hz with Sylomer and 4Hz with springs + dampers, decoupling effectively way below 20Hz"
1.What is Blu-Tack exactly?
By damping, does Thomas mean "adding mass"?
Since
"Blu-Tack: no decoupling, only some limited surface damping in the higher midrange." Thomas JJ.
I presume adding some Blu-tack to a very heavy stand (like full of sand?) is not enough.
3.What kinda of Sylomer? When I google Sylomer, I get ton of results.
Is spring necessary? Or is it depends on the weight of speaker?
Mine are 15kg (Adam S3X-V). Are springs necessary/useful in that case or even counter productive?
Here is a freestanding speaker from Northward (not sold yet...I think!)
*Real* freestanding speaker decoupling system designed by Northward Acoustics (Northward Systems) tested and built like a tank for us by our friends at AMC in Spain. Variable Push-pull system with Springs+damper and Sylomer used for full bandwidth efficiency. Unit will be placed on top of a dedicated speaker stand. Range from 30kg with f(n) 8.00Hz (e.g. ATC SCM20 ASL) to 75kg with f(n) 5.16Hz (e.g. ATC SCM110 ASL). Some further testing needed, but ETA of final product should be late September.
More about it
here
All these principles can be applied to sub?
Sorry, lot of questions, I don't ask for long answers. It's a very interesting subject, but like other topics in acoustics, we can read anything on the Internet...
