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Turntable Causes Speaker Cones To Excessively Move Rapidly

I have a Technics 1200G turntable, Luxman 595, and I use MM carts. For some reason, when I play my turntable I see my sub woofer cone (REL sub) and my Focal Sopra N1 cones move violently. There is a subsonic filter on it where helps cut down on it. But I am wondering... does anyone else have this issue?

If I didn’t have the subsonic filter would the violent moving of my cones damage my speakers? I ran it for about 2 hours total of turntable music before I noticed. 

Not a issue with my streamer... they stay almost perfectly still. Just with turntable. 

dman777
dman777 OP
188 posts
 

@andyhifiman can you tell me please, was that a techniques turntable where the screws are loose? And what model?

andyhifiman
26 posts
 

Hello dman777,

In my situation I am using a Clearaudio Performance DC turntable with a Universal 9 inch tonearm and this happens to be a belt driven model. The issue in your case may still come from some part in the turntable not properly affixed. Yours being a direct drive turntable may still have something loose or rubbing against another part.

dman777 OP
188 posts
 

@andyhifiman if I can ask please, how did you find out? Did you take it to the shop and they found the issue? Was it the original place you bought it from or a repair shop?

iseland's avatar
iseland
250 posts
 

Did you remove the cover and put the turntable on some kind isolating platform?

 

elliottbnewcombjr
7,704 posts
 

Your speakers have a rear port, close to your TT. They should have included port plugs.

I would 1st move the speakers a bit further apart, and toe them in facing the listening position which ’aims’ the port away from the TT somewhat.

Next, I would plug the rear ports.

AI Quickie:

"Yes, the Focal Sopra No. 1 features a rear ported design with a slot port. 

  • The cabinet includes a small rectangular port at the rear to load the bass unit. 

  • The speakers come with foam port plugs that allow users to seal the ports if desired, which can help with subwoofer integration or placement in enclosed spaces. 

  • The port tuning frequency is approximately 55Hz, providing solid bass response down to about 50Hz." 

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