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LP12 suspension susceptible to acoustic feedback

My turntable setup: LP12 (early 80s model, unmodified except for Nirvana springs), Syrinx PU2G, Shure M95-HE.

When I place the arm/cartridge on a (stationary) LP, the entire arm board and arm rest resonates to light finger taps, and the sound emerges as rather loud thuds through the speakers, at normal listening levels.

When the arm/cartridge is lifted off the LP, the feedback is minimised.

My LP12 rests on three light wooden blocks (the sort kids play with), a marble slab, a wooden slab and four sheets of thick plate glass, in that order.

I'm thinking of getting an IKEA Lack table for the LP12.

Any solutions to eliminate, or minimise the feedback?

Thanks.

Becks
tubemoose

Showing 1 response by r_f_sayles

r_f_sayles's avatar
r_f_sayles
872 posts
 
Since the beginning of time, or at least as long as the Sondek has been
around Ivor Tiefenbrun and Linn dealers have recommended only a light and
rigid shelf below the LP12 for best sonic results.

I understand testing a theory because so little is absolute yet, when the
designer and builder calls for a specific foundation, maybe there is something
to it.

There is not a TT on earth made to withstand "When I place the
arm/cartridge on a (stationary) LP, the entire arm board and arm rest
resonates to light finger taps, and the sound emerges as rather loud thuds
through the speakers, at normal listening levels.' this is not a valid test of TT
resonance mismanagement... sorry.

Personally I have found most suspension TT's to give excellent results with
the same (a light rigid shelf).

The Ikea Lack is such a table.

Happy Listening!
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