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Springs under turntable

I picked up a set of springs for $35 on Amazon. I intended to use them under a preamp but one thing led to another and I tried them under the turntable. Now, this is no mean feat. It’s a Garrard 401 in a 60pound 50mm slate plinth. The spring device is interesting. It’s sold under the Nobsound brand and is made up of two 45mm wide solid billets of aluminum endcaps with recesses to fit up to seven small springs. It’s very well made. You can add or remove springs depending on the weight distribution. I had to do this with a level and it only took a few minutes. They look good. I did not fit them for floor isolation as I have concrete. I played a few tracks before fitting, and played the same tracks after fitting. Improvement in bass definition, speed, air, inner detail, more space around instruments, nicer timbre and color. Pleasant surprise for little money.
noromance
noromance's avatar
noromance OP
10,146 posts
 
@uberwaltz Try 3 Nobsound springs under the 401. 2 at front -the way I have them. Then 2 at back. Interesting upset in your result. Mine is the opposite with the mids projecting free of the speakers and the highs sparkling. Frankly, I thought my ESLs were tired in the treble. Until now. Lit up!
indranilsen
113 posts
 
@mijostyn- I couldn't agree more on that 3hz isolation level. That is our target. However getting to that 3 hz natural frequency with compression springs needs a special focus on the load interms of weight & material that to me is the most difficult factor....That is where you are playing with balance, precision and the level of damping of the surface.
Thanks.
uberwaltz's avatar
uberwaltz
13,381 posts
 
The big problem with just two springs is that it's now like a bike, only support on two 180 degree opposed points.
You really need three or four to be stable.
Try supporting your amp with two points.
You get the picture.
Now four pods means yes you can do it but it is very wobbly as I said even with them being compressed.
rixthetrick's avatar
rixthetrick
1,060 posts
 
As for subwoofers the trick is to give the driver a perfectly solid enclosure with an infinite mass. Not so easy. Put your hand on your subwoofer enclosure while playing something bass heavy.
I have a pair of dual voice coil drivers firing opposed in a sealed cabinet (32mm or 1.26" thick MDF), with substantial bracing. The cabinet is not totally inert, however it is pretty decent. Though certainly no contest for my stand mounts with the steel plate lining it, also with cast iron braces, silicone filled hard drawn copper tubes and birch differential bracing. I have exposed the internals in my system page (the stand mounts, not the sub).

Both lifting the sub an inch, and isolating it at approx >4-5Hz makes for significantly less energy to be injected into the floor, the walls, and everything else.
It is an experiment worthy of the almost puny investment.
You may very well be surprised if you were to experience it for yourself?
slaw's avatar
slaw
22,999 posts
 
My two Martin Logan Depth i subs are made '6 sided' with 3 equally opposing 8" drivers, This, as stated above, eliminates almost all internal vibrations. Several months back I put Stillpoints SS feet under each sub directly to my sprung wooden floor and they made a substantial positive difference. I already had these on hand. I plan on trying springs there at some point, in no hurry though.
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