Nobsound springs - load range


I want to try out the Nobsound springs as damping footers (mainly under my mono blocks and my streamer). I ordered a first set of them and now I wonder about the amount of springs to put in for different weights of equipment.I remember one post that said it works best when 50% compressed (was it @millercarbon?).

I measured the compression of the springs, it takes ~2.5 kg per spring to compress it to 50%. Based on 50% compression target, this yields the following sweet spot configurations (only stable ones, total equipment weight):
- 3 units, 3 springs each: 22.5 kg
- 4 units, 3 springs each (or 3 units, 4 springs each): 30 kg - 4 units, 4 springs each: 40 kg
- 3 units, 6 springs each: 45 kg
- 3 units, 7 springs each: 52.5 kg
- 4 units, 6 springs each: 60 kg
- 4 units, 7 springs each: 70 kgLoad can be considerably higher than expected (somewhere I read about 36kg, which is presumably for 4 units).

Any comments?What about ~10 kg streamer, seems to be too light to compress the springs enough? Does anyone have experience with Nobsound springs under light equipment like this?
Based on your experiences: Would you even dare to put an 80kg floor standing speaker on Nobsound springs?
hm9001

I always get cautious when hearing such dogmatic statements. I would rather consider starting in the dark and doing erratic trial and error on all possible permutations of changes to different variables of a system a waste of time.

I prefer to have at least a basic understanding (or sometimes a hint or theory, e.g. 50% compression for the springs) of the variables and dependencies of a system and how they probably work. It is always good to derive a starting point and some hints/directions for experiments. This saves time in my opinion. And yes, the fine tuning and verification needs to be done by ear. The learnings should then be used to adapt the theory (maybe it’s then 75% compression or even different compression for different components or something totally different). This can at least help others for their systems.

Only repeating statements like "the only way is by hearing" renders this forum useless.

Very well said @hm9001. By design, comp springs "generally" should be in the 80% ~ compressed from free length to get within the low single digit freq.(<5Hz). Of course this gets one in the ballpark and will require experimenting etc.. but for someone to say

"All the calculations are a waste of time." 🤦‍♂️ ooy.

Granted, not as great a waste of time as reading people arguing about it not being a waste of time without giving so much as a single reason why such calculations are useful. But still a waste of time.

Because it takes far less time to try and see. Which in the end is what must be done anyway. No calculation known to man will tell you what will sound best under every single component. The only way to find out is to try and listen. Therefore, as a matter of simple air tight logic, waste of time.

That said, I encourage some of you to do so anyway. Better use of your time than opining here.

I disagree, this time-rare, with mc.  There's nothing wrong with looking for the best starting point via applied science, at least not IMHO. Others can try one hundred permutations and and individual audible testing if they so choose. The key is getting to the right place in the end.

OP now you have tried ear plugs. NOW take the upper and lower portion along with the springs, and put the pocket side down. Spray everything with aerosol Flex Seal, reinstall your gummy puffers (ear plugs) in the springs and assemble.. 

Try that. Suspension 101. :-) Added another 6-8.00 usd for great dampening on your vibration and accumulator (shock) control.. 

I'm working on a budget pneumatic (air ride) system. :-)

Regards..

At peanuts cost i will try it myself.... Thanks to the old mechanic who feed chickens all day long....😊