2. analog
  3. 183298-83215

What is you tonearm’s Maximum Distortion?

I’ve been playing around with different cartridge mounting, as a Grace arm the plinth of my Lenco cannot be mounted at the recommended pivot-to-spindle distance of 222mm (closest it can get is 225mm).


My best figures in theory seem to be:
Max. Tracking Error: 3.51 degrees
Max. Distortion: 1.21 %
Average RMS Distortion: 0.73 %

This is with: P-t-s 225mm; overhang 11mm; offset angle 19 degrees.

What are your figures for your setup?

fusian
lewm
13,066 posts
 

That has been a very popular subject here lately.  How are you calculating distortion?

fusian OP
129 posts
 

I’m trying to make careful measurements, but only using a metal ruler - nothing fancy - and plugging the measurements into the vinylengine “Overhang Shift Calculator”.


https://www.vinylengine.com/tonearm_alignment_calculator_pro.php?arm1=Grace+222mm&l1=ps&a1lv=222&a1=cu&oh1v=15&oa1v=21&arm2=Grace+225%2F15&l2=ps&a2lv=225&a2=cu&oh2v=15&oa2v=21&arm3=Grace+225%2F12&l3=ps&a3lv=225&a3=cu&oh3v=12&oa3v=21&arm4=Grace+225%2F10&l4=ps&a4lv=225&a4=cu&oh4v=11&oa4v=19&rs=12&rsv=&og=iec1&ogv=&ig=iec&igv=&cal=y&submit=calculate

 

 

Ag insider logo xs@2x
rauliruegas
13,066 posts
 

Dear @fusian  : I don't know which kind of alignment you are trying to use.

 

Löfgren A/baerwald ( IEC standard. ) gives you a little lower distortion levels : 0.61% and 0.4% respectively with maximum tracking error 1.78°.

Now, it's not easy to be aware of the true quality differences you are listening between that average distortion 0.73% and 0.4%. To be aware of it your room/system has to has a very accurated high resolution and " educated " ears.

 

Regards and enjoy the MUSIC NOT DISTORTIONS,

R.

 

More to discover