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Thorens TD 320/Lyra Delos ringing/clinking noise

Hello all. First post here. 

I have had my Lyra Delos for about 9 months and love it. After careful setup and the break-in period, tree sound really opened up. Initially, I was using it with a Thorens TD 147, but I was getting a weird ringing/metallic sound that was audible on headphones.

Various testing determined it wasn't the motor on the table, so I assumed it was an issue with the Thorens suspension or tonearm (TP 16 mkIII). I then bought a Thorens TD 320 with a TP 16 mkIV tonearm, carefully mounted the Delos, and what do you know, I'm getting a very similar sound. It's almost like a clinking/ringing sound at around 700hz.

Before I start swapping cartridges (not easy with these Thorens tables), is this the kind of sound that could be the result of a faulty suspension/damping inside the Delos? The tracking is fantastic, the cantilever rides at a 90 degree angle during playback, which would lead me to believe that it's not the Delos suspensionm. I am still within warranty period though, so I'd like to get this resolved sooner than later if it could indeed be something defective with the cartridge. 

marblesmike
jcarr
391 posts
 

Hi Mike: Particularly since your Delos remains within the warranty period, please feel welcome to deliver it to the dealer that you purchased it from, and have the dealer send it to the Lyra distributor in your country, who will ship it to us in Japan.

It will help if you could include a note in the box, that describes the issue that you are experiencing, the cartridge serial number, and perhaps a list of the equipment that you are using the Delos with (including amplification).

A metallic clinking / ringing in the vicinity of 700Hz doesn't sound like anything that I recognize, but we will certainly perform tests to either verify (and correct) the issue, or exonerate the Delos so that you can focus your attentions elsewhere.

kind regards, jonathan carr (Delos designer)

marblesmike OP
6 posts
 

Thanks! What's the turnaround time for something like this? I'm in the States. 

mofimadness's avatar
mofimadness
6,546 posts
 

Jonathan's the BEST!  

richardbrand's avatar
richardbrand
1,469 posts
 

Hmmm - 16-pole synchronous motor and about 700-Hz ringing. I believe the motor itself runs at 250-rpm for 33-rpm playback.  Can you try 45-rpm and see if the frequency of ringing changes?

Before taking up Jonathan's terrific offer, could I suggest using a stethoscope (need not be expensive) to listen for vibrations at various points around the chassis, especially near the motor and near the arm base.  The platter is supposedly non-resonant but it is a big chunk of zinc.  Do you have a platter mat which should damp vibrations in the platter?

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