Home Vinyl Asylum

Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ.

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Vinyl Asylum ]
[ Alert Moderator ]

RE: ART9 vs ART7

> It would be interesting to find a graphing of the two tracking "standards" for a series of cartridges to see if there is a meaningful relationship.

The reason for different values of static compliance and dynamic compliance is because of cantilever damping. Unfortunately, different cartridge models have different cantilever damping values. Therefore, the only thing we can be sure of is that dynamic compliance at resonance will be somewhere in-between static compliance and dynamic compliance at 100-Hz for a damped cantilever moving system.

The rule-of-thumb that I use for determining compliance at resonance is to take the average of static compliance and dynamic compliance at 100-Hz. For example, the AT-ART9 is specified to have 35-um/mN static compliance and 18-um/mN dynamic compliance at 100-Hz. Therefore, I would estimate its dynamic compliance at resonance to be (35 + 18) / 2 = 26.5-um/mN.

This seems to be a reasonable approximation for my AT-ART7 in my 10.5-gram effective mass SME V tonearm. If we use the following equation to calculate the arm/cartridge resonance frequency for an 8.5-gram cartridge with compliance of 26.5-um/mN, 1.0-gram mounting hardware and tonearm effective mass of 10.5-gram, we get an arm/cartridge resonance frequency of 6.9-Hz. That is approximately what I measured using Shure's Audio Obstacle Course test record, which has excitation frequencies at integer values only. I measured an arm/cartridge resonance frequency in-between 6 and 7-Hz with greater oscillation at 7-Hz.







This post is made possible by the generous support of people like you and our sponsors:
  Atma-Sphere Music Systems, Inc.  

Follow Ups Full Thread
Follow Ups
  • RE: ART9 vs ART7 - John Elison 11/28/1620:07:48 11/28/16 (4)
FAQ

Post a Message!

 Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Subject:
Message:   (Posts are subject to Content Rules)
Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:  Automagically notify you when someone responds.

[ Top Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2025, Audio Asylum, all rights reserved ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]