I just replaced my VPI Prime with one of the last 30 Aries 3D special series with some other unannounced upgrades. I have a Benz Micro LPS set up by Jay at SoundStage Direct. It sits on a Vibraplane 2214 on top of a dedicated Steve Blinn extra wide three shelf rack, with another identical rack for my other components. It is connected to a Pass Phono stage into a Spectral DMC 30SV to a Spectral DMA 30 RS via MIT SHD IC's and MIT HD90 Rev 2 Biwired speaker wires into Vivid G3's and two JL F-113's connected via Analysis Plus Super Sub IC's and Analysis Plus Power 10 Oval PC's (which are better for bass than the MIT's) and I have a problem that for the life of me, I cannot rectify--low frequency severe oscillation in both the JL's and the Vivid's.
Part of my motivation for switching from the Prime to the Aries 3D was to try to tame the same low frequency feedback problem I had with the Prime set up the same way as the Aries 3D.
While I have no bass problems via digital sources and actually get impressively tight and low bass at deafening levels, with analog, I get violent driver oscillation in both channels above moderate volumes when the source is analog. Turning down the ELF settings to their lowest levels, -12, helps a bit and gets me another db or 2 before the onset of oscillation. I do not see any arm oscillations nor any vibrations on the surface of the Vibraplane..
I have tried changing the Vibraplane pressure to see if that makes a difference with absolutely no difference. However, totally shutting off the Vibraplane and using it merely as a very heavy base, makes a major improvement of at least another 6 db before the onset of oscillation and that is with the ELF set to -3 instead of -12.
The tracking force of the LPS is 1.85 grams, which is what SoundStage Direct says works better than the max tracking force of 2 gms for this cartridge/table combo
I am open to any suggestions.
Thanks.
Part of my motivation for switching from the Prime to the Aries 3D was to try to tame the same low frequency feedback problem I had with the Prime set up the same way as the Aries 3D.
While I have no bass problems via digital sources and actually get impressively tight and low bass at deafening levels, with analog, I get violent driver oscillation in both channels above moderate volumes when the source is analog. Turning down the ELF settings to their lowest levels, -12, helps a bit and gets me another db or 2 before the onset of oscillation. I do not see any arm oscillations nor any vibrations on the surface of the Vibraplane..
I have tried changing the Vibraplane pressure to see if that makes a difference with absolutely no difference. However, totally shutting off the Vibraplane and using it merely as a very heavy base, makes a major improvement of at least another 6 db before the onset of oscillation and that is with the ELF set to -3 instead of -12.
The tracking force of the LPS is 1.85 grams, which is what SoundStage Direct says works better than the max tracking force of 2 gms for this cartridge/table combo
I am open to any suggestions.
Thanks.
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