Question on FR 66s

Pani,
I think there is no general rule for compliance, effective mass of tonearm and superior sonic result. The formula for that is only a formula but you have different Arm materials (steel, titan, wood, aluminum for example) all have totally different energy transfer abilities, you have Unipivot arms, dynamically balanced Designs and so on...and you have different Arm geometries which are also responsible for superior or inferior tracking ability ...
To make a very long story short, you can all strip down to the abilities of the Designer. You will find endless examples for top sounding combinations which are not a 10 in the 8-12 formula range and you will find mediocre sounding combinations which are a 9.9 in the calculation.

FR-64s
the alternative P2S is 231,5mm

I think that thread was deleted based on aggressive posting from a mexican member which had a lot of personal attacks when I remember right.

Thanks all for the information.
Nandric, I don't plan to get rid off FR 64s either. Just go on the a different table. I got the FR66s from a good friend. I am not sure what the realistic price or fair price of FR 66s is (is there such thing) but I did pay quite a bit less than ebay usual asking price. I did see that there is an armboard for 66s for SX-777 so I will have to see if I could find one. In the meantime, FR 64s stays on my Micro Seiki.
I bought the FR mainly because all the other arms I have did not play well with Koetsu. Now that I have 2 FRs, I can try other cartridges as well.

As Thuchan has mentioned......the FR-66s is possibly the most 'universal' tonearm ever designed?
The only modern arms which I have found to equal it (and the FR-64s) in this respect......are the Continuum Cobra and Copperhead.
I have directly compared the FR-64s and 66s to the DaVinci 12" Grandezza and the Graham Phantom II on the same turntables with a range of cartridges (both LOMCs and MMs)........and the Fidelity Research arms have a control and authority which is immediately obvious.
The images are stable and pinpoint whilst the soundstage is the widest and deepest you will hear if the vinyl contains this information.
The bass depth and control is quite astonishing.......but the real highlight I find.....is the complete relaxation that one feels when listening.
These arms allow one to forget entirely about the electro-mechanical gymnastics involved in the execution of musical extraction and completely immerse oneself in the music.
You will find it difficult to stop dragging out long forgotten records and re-discovering.
And the DaVinci and Phantom II arms?...........they're gone :-)

Hi Suteetat,

I also have an SX777 Air, and have once put in the FR64S with great result! I am interested at your mentioning of an armboard for the FR66s.

If I understand correctly, you can only fit 9"-10" arms on the 777! Actually, not long ago, I missed out on the rare model called 777L (long) which can fit 12" arms!