Graham Phantom Supreme?

The 10" arm for the Graham is the way to go. That was Musical Surrounding recommendation anyway.

The 10" arm for the Graham is the way to go. That was Musical Surrounding recommendation anyway.

Did they say why?

Dear Lewm, dear Rockitman, - I can't resist, but I now have to second Syntax' choice for the 9" arm wand. While I am certainly usually try to go for increased effective length, the 9" standard arm wand is the best for the Graham Phantom.
Why ?
I leave this to Syntax to explain - as it was on his selection of all 3 arm wands that it was discovered.

10-28-11: Syntax

The 10" arm for the Graham is the way to go. That was Musical Surrounding recommendation anyway.

Did they say why?

The longer arm having more mass also increases inertial mass of the cart which can be problematic depending on the cart used. Longer arm tubes also allow for more resonance. Bob Graham said this to Musical Surrounding and believes the 10" is better overall than the 12" even though you will have slightly lower tracking error with the 12". That's how I understand things anyway.

Dertonearm. the 10" arm is the sweet spot according to Graham. Lower tracking error than the 9", but less effective inertial mass than the 12" which can be good depending on the cart.

Rockitman, I usually always would go for lowest tracking error - i.e. 12" effective length or more - even at the sacrifice of increased effective mass.
But with the Graham Phantom this is a different issue and the 9" is the "best" arm wand out of the 3 length available.
Syntax may have the honor to reveal why.