Question about Technics SL-1200MK5 Turntable

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Thump or thud coming from speakers when turntable is tapped

Recently I noticed a thump or thud coming from my speakers when the needle is on the record. I have two tables and it happens with both of them. The sound quality is fine and everything else works great. I have tried changing the needles/cartridges, swapped mixers, adjusted the height, checked the grounds and I still have this sound. The best way to recreate it during normal use is by pushing the light down. On the other hand, I can tap my thumb against the shell of the table, anywhere, and still here this sound. I can also hear it from tapping the table on where the equipment sits and also the mixer. The next thing on my list to try was to swap the surge strip. Any ideas?

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  • rstorrs1 Feb 24, 2009

    The speakers are about 2 - 3 feet away. They would be behind my back. I can see the noise register on the mixer and notice it less on the headphones. If the volume is down on the amp the noise is still there.

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There is absolutely no comparison between a vintage Thorens and the technics tables other than they play albums. The suspension system on a TD-166 table needs to be finely tuned. It's not like any other system. Would you say a swill Rolex is ok if you thump it and it makes a weird noise? These machines were made by the same people as the rolex mindset. Although it may be normal, I can't say. All I know is I trust no one with my TD124 besides STS Turntables. Contact them at classicthorens.com. Their technician was mentored and trained by original Swiss Thorens engineers and is by far the best with these vintage machines. You can't just haphazardly thigh ten or loosen the suspension springs. There are tolerances that must be maintained for proper performance they were designed for. You have the rolex of turntables, an entry level rolex but a rolex nevertheless.

Posted on Nov 26, 2014

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Just wondering how close your speakers are to your tables.Could be the tables pick up the low from the speakers.

Posted on Feb 23, 2009

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HI
I have noticed this kind of problem even on my 1970's original Technics SL1200 mk1! It certainly won't help that your speakers are very near your decks - try to get them further away if you can.
I have looked at a Technics SL1200mk2 recently and you could hear the "thump" or "thud" when the deck was tapped.
In my experience this seems to be more of a problem with direct drive turntables (it's do to with the isolation of the platter & arm), though less of a problem on belt drive decks (I own a Thorens TD166mk2) and I can tell the difference.
All I will say is if it is playing the music fine - no need to worry.

Posted on Jul 20, 2009

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