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  3. 194860-2135

So, “Audio Science Review” really doesn’t like this video

There is a recent video by Steve Guttenberg’s friend Mark on speaker isolation devices. In the video, Mark uses informal listening observations and a microphone and software to try to distinguish differences between different isolation devices with inconclusive results. He then resorts to a blind ABX test with an interesting control related to speaker position.

I really like it for several reasons. One, it is well produced and dryly funny.  Two, it shows a promising approach to blind ABX testing.  I am also in the market for speaker isolation devices.

I posted it on this forum yesterday highlighting the ABX element and nobody commented.  I also posted it on Audio Science Review where it prompted a page plus of discussion including the forum host Amir, most of it skeptical, and then today it was pulled from the site.  The mic drop seemed to really irritate some people there. Or I don’t know, maybe it was something in one of my posts in reply - l’ll never know now.

I am curious what folks on Agon think about the subject matter, the approach and the production values of the video.

https://youtu.be/XAOD3aUfIYQ?si=pYs72o9UAl-21LH6

kn

knownothing

Showing 1 response by gdaddy1

gdaddy1
281 posts
 

I played around with this a bit.

The vibration, generated from the speaker, is measurable with an Iphone app. The Vibration can travel down the stands and transmit to the floor. In the video he had very well damped stands with lots of mass so that was taken care of. However, he still had vibration in the speaker itself.

Could there be an improvement by using a 'shock absorber' to damp the speaker itself? Is there possibly a microphonic effect on the internal crossover?

I achieved the same reduction in vibration by setting my speakers on square blocks of upholstery foam. The vibration was greatly reduced. I've also heard that soft yellow squash balls also work well.

There is also a method used by speaker builders that use a soft glue to reduce vibration on the crossover by anchoring the components to the circuit board. This is to prevent microphonics as well.  Just a few small connecting dots of soft glue reduce movement. A capacitor attached only by solder to it's leads can vibrate excessively.

 

 

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