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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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In Reply to: I understand the calculation of effective mass ... posted by garth on November 17, 2005 at 15:29:21:
Yes because if the two arms have the same effective mass but different weight distributions then they must have different actual masses.If you lower the headshell mass and increase the arm tube mass so that the "new" arm has exactly the same effective mass as the "old" arm, then the way it responds to an applied force at the stylus will be exactly the same when the arm is considered as a rigid body . The differences between the arms will be in such matters as rigidity and resonance, not in moment of inertia.
The new arm will be heavier than the old arm because the added arm tube mass is closer to the pivot so you'll need to add more mass than you took off. Let me reiterate however that it will have exactly the same response to an applied force at the tip because we have kept the moment of inertia the same.
I don't mean to imply that the two will sound the same - I personally think the more mass you can take away from the headshell end of the arm to apply to the arm tube to improve rigidity the better.
Mark Kelly
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- I think we are arguing about two different things. - Mark Kelly 11/17/0515:41:36 11/17/05 (3)
- Mark you are confusing me here and this is not a good thing. - tubesforever 19:23:58 11/17/05 (2)
- No. - Mark Kelly 19:57:58 11/17/05 (1)
- I am sure I deserve this Mark! - tubesforever 23:06:12 11/17/05 (0)
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