Groovemaster II tonearm

I've asked variations of this question over the years and never got a really straight answer. From what I could discern, it has a powerful, controlled sound but somewhat dark and rolled off top end. I remember when publication's did product comparisons but these single product reviews where everything is wonderful fail to enlighten. 

How can a tone arm make a dark top end?

I have an interest, so try and stay away from too much subjective commentary. The Groovemaster is a great tonearm and good value. More balanced and controlled than the vintage  FR64S, which for anyone considering a high mass arm should be a point of comparison. On the other hand not as 'exuberant' as the 64S either. I have both and love them for what they do well ( albeit differently ). 

The 9" Groovemaster II with sliding base and silver wiring is still available through Philip Holmes of Mockingbird Distribution for $1925, includes shipping and custom fees.

Sorry, I did have a FR64S, a win Lab SD10 and, for me the best arms, the Breuer Dynamic Type 8C, I had two, one black and one gold. I did have the opportunity to meet Erhard in Luzern when I was living in Wien. RIP.