Increasing tone arm effective mass?

Mass added at the headshell will add directly to the effective mass of the arm. Mass added further down the arm tube will have less effect on the arm mass, just like an anti-skate weight. Arm wraps do more for damping then increasing mass, unless it's heavy near the headshell.

The effect on the pivots should be taken into consideration. Some arms can't really support too much increase in mass. Same goes for rigidity and resonance. Hard to make generalizations - arms are very different.

I did it by using one supplied CW instead of two. This puts the weight far fro mthe pivot point with the same VTF. It produced more defined and impactful bass. It does not work on some carts. Different effect on different carts.

Thanks so far. I should have stated that I knew the penny trick increased VTF.

You can also add mass by using a tonearm wrap. It's neither better nor worse than adding weight at the headshell - just different. A tonearm wrap will also damp resonances in the armtube, especially if your armtube isn't internally damped.

You can use teflon plumber's tape; that what I did and it worked fine, although it wasn't pretty. You can also use a commercial product like this:

http://www.atma-sphere.com/products/wrap.html

I used both methods to try to match a Denon 103R to my Well Tempered tonearm. Both helped, both sounded different, but neither really solved the problem. IMO there's just no substitute for a high mass tonearm when you're using a low compliance cartridge.

David

It can work, but since energy transmission between each cartridge and tonearm is unique the only way to know how well (or badly) is to try.

The idea is not to increase VTF of course. You adjust after adding a weight so that downforce remains constant. Not really like the old penny trick at all.

- different materials sound different
- mounting above vs. in contact with the headshell sounds different
- whatever you do, make sure your mounting is still rigid