If I'm not the exception you may get more people to look at your picture if you post it as a .jpg. For me to open a zip file is so much effort changing screens and having to get out my secret .zip decoder ring, I just cannot bother, even if it is something I'd really like to see. The other problem I fear is to go through the un-zip process it leaves a trail of memory consuming garbage in my computer after I finish viewing. Some folks like zip. I never got used to liking it.
Zipped bmp is indeed pathetic.
I have a personal dislike towards sand - it seems to rob music of life and dynamics when used in platforms and will probably do the same in a turntable.
Nothing harmless about that. It's clearly frequency specific and as other types of excessive damping doesn't sound good IMO.
Based on successful commercial designs lead or oil/lead seems to be a successful combo and will provide reasonable damping and great inertia. Plus, it's bad for the environment which is another hint it may sound good
I have a personal dislike towards sand - it seems to rob music of life and dynamics when used in platforms and will probably do the same in a turntable.
Nothing harmless about that. It's clearly frequency specific and as other types of excessive damping doesn't sound good IMO.
Based on successful commercial designs lead or oil/lead seems to be a successful combo and will provide reasonable damping and great inertia. Plus, it's bad for the environment which is another hint it may sound good
I disagree strongly. My TT's are on a large sandbox, with lead/oil/sand plinths on two of them.analog_sa said:
It is good, but I can't see how it's bad for the environment when it's enclosed in a case.Based on successful commercial designs lead or oil/lead seems to be a successful combo and will provide reasonable damping and great inertia. Plus, it's bad for the environment which is another hint it may sound good
IZHAKKATZ said:
Go to http://www.xnview.com and download XnView - a great little freeware image viewer, tweaker and converter. If you don't need the viwing or tweaking, just get Nconvert.
1-bit binary PNG or GIF will be the absolute smallest size for a linedrawing.
Hi,
One major advantage of lead over sand is that you can use it as a solid block.
Lead has a Q of around 3 Hz as a solid which should be low enough for all things audio.
I don't know the Q of sand but its damping properties come mostly from the fact that it's a grainy structure composed of solids randomly disposed with aircavities inbetween which tends to break up and spread resonance.
One can safely assume that the damping properties will vary according to the mass it's supporting, probably also with granularity of the type of sand itself.
Sand also tends to shift depending on where the highest mass is located, lead won't do this in it's solid form.
Note that lead can also be used in a form known as leadshot where it will behave similarly to sand and adapt more easily to the shape it is supporting.
In some applications such as as a filling material for loudspeaker stands it is asier to contain than sand as it can be had in far coarser grains than sand would.
Cheers,
One major advantage of lead over sand is that you can use it as a solid block.
Lead has a Q of around 3 Hz as a solid which should be low enough for all things audio.
I don't know the Q of sand but its damping properties come mostly from the fact that it's a grainy structure composed of solids randomly disposed with aircavities inbetween which tends to break up and spread resonance.
One can safely assume that the damping properties will vary according to the mass it's supporting, probably also with granularity of the type of sand itself.
Sand also tends to shift depending on where the highest mass is located, lead won't do this in it's solid form.
Note that lead can also be used in a form known as leadshot where it will behave similarly to sand and adapt more easily to the shape it is supporting.
In some applications such as as a filling material for loudspeaker stands it is asier to contain than sand as it can be had in far coarser grains than sand would.
Cheers,
Actually sand is available in as coarse a size as you want.
It's called gravel at a certain point , but that is more of a semantic distinction. Yet most people don't go for coarser sand. I think they believe that the sand is damping by converting energy into heat as Izhak states. Most people I've heard of that use lead shot mix it with the sand for the same reason.
Melting it and forming a block lowers theresonant frequency, but probably doesn't damp much EXCEPT that it's attached to something else (the tube of the stand?) some there will be constrained layer damping.
It's called gravel at a certain point , but that is more of a semantic distinction. Yet most people don't go for coarser sand. I think they believe that the sand is damping by converting energy into heat as Izhak states. Most people I've heard of that use lead shot mix it with the sand for the same reason.
Melting it and forming a block lowers theresonant frequency, but probably doesn't damp much EXCEPT that it's attached to something else (the tube of the stand?) some there will be constrained layer damping.
Hi,
It surely will but it's rather slow at that.
What you can compare it to IMO is the type of damping materials used inside loudspeaker cabinets that have a foamy, cellular structure.
These tend to diffract soundwaves but I doubt these to be very effective at very low frequencies though.
The use of leadshot in speakerstands has of course another advantage; lead is much heavier than sand.
Combining both sand and lead makes perfect sense, it all depends on what it is you want to achieve I suppose.
Cheers,
It surely will but it's rather slow at that.
What you can compare it to IMO is the type of damping materials used inside loudspeaker cabinets that have a foamy, cellular structure.
These tend to diffract soundwaves but I doubt these to be very effective at very low frequencies though.
The use of leadshot in speakerstands has of course another advantage; lead is much heavier than sand.
Combining both sand and lead makes perfect sense, it all depends on what it is you want to achieve I suppose.
Cheers,
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