VPI 3-D tonearm

I have a Lyra Titan-i on my 10" 3D tonearm- sounds great!

It is ESSENTIAL to know the effective mass for proper cartridge matching!

Why is VPI hiding this spec??? What are they afraid of???

I guess they do not believe in science, or think it will work optimally with "any" cartridge. LOL!

By the way, they have never listed the effective mass of any arm in the past.

The effective mass of the VPI 10.5" 3D tonearm is 10.6 grams

Harry told me that effective mass is an unimportant consideration with the 3D because it has nearly no resonance at all. That's what makes it sound so good.

With all due respect to Harry, while the resonance level of the 3D arm may be relatively low, every arm and cartridge combination will still have a resonant frequency. The total effective mass of a tonearm and cartridge will determine where that frequency lies. The frequency of that resonance is an important consideration when matching an arm to a cartridge. Ignoring it can result in combinations with the resonant frequency within the range of record warps, and that can never result in optimal performance. Of course, YMMV.