SME V arm: dynamic VTF or straight weight


I am using an SME V arm and wonder if anyone has compared the sound using the dynamic VTF (i.e. setting the dial to 2.0g) versus setting the dial to 0.0g and simply using the counterweight and an accurate scale to set VTF at 2.0g. Is there a sonic difference and what is the theory behind one versus the other?

I would think that using the latter method moves the counterweight closer to the arm's pivot point and effects how the bearing is loaded and possibly also the moment of enertia of the arm.

I have briefly tried to hear a difference, but couldn't and plan to do a more controlled comparison. Anyone's own experience would be appreciated. Thanks.

Peter
peterayer
Dear Peter: Now that you already try both VTF " ways " you have the opportunity ( on both ) to make a very fine tunning with the VTF set-up you like it more and through tiny VTA changes try to be near on the other sound characteristics that you like in the other VTF set-up, as a fact you can do it in both VTF ways.

Almost always exist a threshold ( very tiny but exist. ) where ( in some frequency range ) tiny VTA changes does not alter the main sound characteristics and through these VTA very tiny changes you can achieve an important improvement.

Btw, I don't own the PC-1 but I already have it in my system ( from a friend ) and I loaded at 100 Ohms with very good results.
In two other systems where I heard the PC-1 were loaded at 100-150 ohms ( no SUT, active gain. ). I understand that your Pass is an active gaing design, right?. Do you already try to eun your PC-1 at 100-150 ohms? and with no AS or only 0.5? . These are interesting alternatives and person/system dependents on its result levels.

Regards and enjoy the music.
Raul.
Dear Peter: That threshold that I'm speaking is : through our each one ear/brain perception.

Raul.
Raul and Daniel,
Thank you very much for your comments and thoughtful advice. Raul, I did try loading the PC-1 with 100 ohms just like my old Sumiko Celebration, but something was missing. With the help of a friend, I went up to roughly 120, 140, 200, 249 and 452 and down to 75, 47, 22, and 10. As you may know the XOno has about 230 possible settings and has an active initial gain stage. I agree that the 22ohm setting seems low, but for me there is a good balance between bass definition and weight and good upper end extension without stridence. But more importantly, at 22ohm everything suddenly sounded right with air and presence. At 22 ohms, the "gestahlt" hit me and everything just sounded right.

Regarding tiny VTA adjustments: The biggest problem with the SME V design is the difficulty of adjusting height. Every time I try it, the arm column moves slightly out of vertical because the VTA screw is off center and I have to recheck azimuth. This is a big problem with the SME arm. So I tend to make very tiny VTA adjustments by altering VTF. And unless I bought the TriPlanar or Phantom, I would not consider changing VTA for each different LP thickness like some people do.
Regarding tiny VTA adjustments: The biggest problem with the SME V design is the difficulty of adjusting height. Every time I try it, the arm column moves slightly out of vertical because the VTA screw is off center and I have to recheck azimuth.

This is not the case with any of the (5) SME 312S tonearms I own or have set up. Wonder what the difference is?