Speaker Stands And Mass Loading - AVS Forum
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post #1 of 3 Old 01-26-2008, 06:39 PM - Thread Starter
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I found a bag of some all purpose sand in my garage the other day. I thought I would fill my B&W speaker stands with it to see if mass loading would make a difference in the sound of my CM1s.

I acoustically treated my room but a clap test revealed a ringing that I sourced to the hollow metal stands supporting my speakers. The ringing seemed to be most activated in the upper range of the human voice.

I carefully, with a cup, poured sand into each pillar until all four (two per stand) were full. Rapping on the side of the tubes after filling them produced only a low dead thud. So far so good. After replacing the top plates I clapped loudly and to my satisfaction, there was no ringing or any echo at all. I set the speakers back on top and put on some music I was just listening to earlier. Whoa...

Immediately I noticed everything sounded tighter, especially bass. When the vocals kicked in I was very surprised how much more detail I could hear and how clear the singer's "image" was. High end details were more apparent and defined too.

Basically, everything was clearer, more detailed and more solid sounding. For paying nothing and taking a little time out of my day, I'm very satisfied and recommend anyone with hollow speaker stands (especially metal) to try filling them and hearing your system like new again.
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post #2 of 3 Old 01-27-2008, 09:28 AM
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I have both mass loaded and regular (hollow) speaker stands. I too thought that I heard an improvement with the mass loaded stands, it may be wishful thinking on my part. I have also loaded 20 lbs of sand in the ballast chamber of each of my Mission floor standing speakers, it also seemed to solidify the bass. It may also be a case of "if I have to mess with this damn sand, it had better be an improvment!"
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post #3 of 3 Old 01-27-2008, 12:18 PM - Thread Starter
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Well, whether the musical improvements are real or not, I can say for SURE that the sand has eliminated the ringing that the metal tubes used to give off. Before, if I was playing music a bit loudly (often) and paused it, I could hear the ringing trailing off after the music had stopped. Thusly, the stands were adding their own frequency to the sound that was played through my speakers, which is clearly not good for accurate reproduction.
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