Anyone notice different amounts of surface noise with different arms?


Using the same cartridge, I just went from an SME 3012R to a Bokrand AB309 and while the Bokrand is no doubt a better sounding arm in my system, I’m definitely hearing more surface noise. Records are cleaned with a Degritter so it’s not dirt... but the arm picks up more of the noise from my older records.

dhcod

Showing 2 responses by larryi

I’ve heard some arm swaps using the same table and cartridge where the sound changed and apparent surface noise changed too.  Arms that make the sound seem livelier also tend to make noise more prominent, while arms that sound more precise and tight are quieter.  I think it has to do with how well an arm damps the vibrational energy dumped into the arm by the cartridge.  Surface noise is a high energy impulse of extremely short duration; if the arm is well damped, that pulse of energy does not keep moving back and forth in the arm and headshell and thereby moving the cartridge and being read by the cartridge signal generating element.  Musical signal will also reverberate more in a less damped arm, but, that will be perceived as natural reverberation because it is correlated with the music.  Ticks and pops don’t sound like music because of their short, very fast impulse and lack of harmonic structure and so they stick out and sound louder if they persist because they aren’t damped quickly.  
 

That is not to say that well damped arms sound better because they reduce artificial reverberation.  That “something added” might be a plus, depending on one’s taste and system synergy.  

I heard the same cartridge (Transfiguration Orpheus L) on the same table (Linn LP12) with two different arms (Naim  ARO and Basis Vector 3).  The Naim ARO was a livelier sounding arm, but, surface noise was a little bit more prominent.  In this particular system, I preferred the Naim ARO.  I cannot say that set up was perfect each time, but, a good protractor, digital scale and Fozgometer azimuth tool was employed, so setup was pretty accurate.