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Turntable feedback rumble problems with new sub

I have a Technics 1200 M3D and KEF LS50s. No issues. I just added a REL T7i and have a runaway feedback rumble problem at high volume. I added Isonoe footers to the table which didn’t do much. Unfortunately the table and speakers sit on a big media cabinet from Design Within Reach which is not ideal.  Not sure what the right next move is.  More turntable isolation, put footers under the cabinet legs, new turntable, new furniture, or new house?
ronribbons

Showing 2 responses by cd318

cd318
2,636 posts
 
Yes, as slaw and others have said, it’s a turntable problem. One that needs addressing asap before you wreck the voice coil/spider assembly through heat.

Some amps have built-in filters to cut subsonic signals from reaching the speakers but most don’t.

Don’t ignore it. My friend had a similar issue with his Pro-Ject Carbon which resulted in a burnt out sub on of his Kef's.

Check everything turntable related. From cartridge tip, to arm, to turntable placement.

As a reward you’ll get better sound too.
cd318
2,636 posts
 
ronribbons,

The LS50s must have been triggered by the REL sub and feeding back into the turntable via the cabinet and then feeding back into the sub etc.

As rdk777 said, this is something to keep an eye on in future.

Glad you’ve sorted it, you should also get much better sound now.
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