ViV Labs

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neobop

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ViV Labs
« on: 20 May 2014, 03:12 pm »
The most fascinating arm I've seen recently is the ViV Labs Rigid Float.   
http://www.highend-electronics.com/viv-labs.html

I like the way those speakers look, but the arm?
Put away your preconceived notions and check out Stereo Time's Stephen Yan:
http://www.stereotimes.com/post/viv-lab-rigid-tonearm/

neo

watercourse

Re: ViV Labs
« Reply #1 on: 20 May 2014, 03:53 pm »
I saw this one too, and I agree it looks very interesting. I really like the (lack of) arm mounting requirements... plop it on your plinth, any plinth.

neobop

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Re: ViV Labs
« Reply #2 on: 20 May 2014, 11:23 pm »
Yea, when I think of the hours spent cutting and drilling armboards this is like a breath of fresh air, but is it worth it?  Looks kind of strange.

After reading a couple of reviews, I think this might be killer.  Having the cantilever on the plane of the pivot might be better than a little less alignment error.  Speaking of alignment, here you have a one point underhung alignment.  :o 

Skating is also dramatically reduced, so torsional affects are also.  Here's the formula for skating from Stereo Times (above):

Side force at any particular tonearm position is given by the formula

µW*tan(α+?), where

µ is the friction coefficient between the stylus and groove,

W is the stylus tracking force (or VTF)

α is the tracking error angle and

? is the offset angle


Tracking error angle is relatively small compared to offset angle and here offset is zero. 

I would guess that the longer arm (13") is more desirable.  It would minimize alignment error, but Stephen Yan says the shorter one sounds better.  He think it's due to reduced resonances.   Wild stuff. 

The alignment point is a little to the inside of center groove.  I wonder if one of those disco tables with a straight arm could be aligned like this?
neo


neobop

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Re: ViV Labs & others
« Reply #3 on: 4 Jun 2015, 10:50 pm »
There was another straight arm with no offset made by RS Labs which became 47 Labs.  This one is unique.  It not only had the cantilever pointing at the pivot horizontally, but vertically as well.



http://www.dagogo.com/rs-laboratory-rs-a1-tonearm-rs-3-rotary-headshell-review

The pivot is elevated, which results in a 16° angle between the tip and pivot. 


Hold on to your hat for this one, the Yamaha YSA-2 - an upgrade for the GT-2000, Yamaha's statement table.



http://audio-heritage.jp/YAMAHA/etc/ysa-2.html
http://www.thevintageknob.org/yamaha-GT-2000.html

neo