MC for Low Mass Tonearm

@gakerty   I did not recommend the top of the line Benz LPS as it could be mistaken for the MR model, which I think is one of the heaviest cartridges and probably not suitable for a lightweight arm ( albeit, I do think on my WTA Black it would work, due to the arm's suspension design). Not sure if the regular model you use, the LPS, is lighter, I think it may be considerably so...??

Barring problems with counterbalancing the cartridge's weight, the weight of the cartridge is inconsequential, in my opinion, so long as the combined effective mass (tonearm + headshell + mounting screws + cartridge) is within reason. In fact if the compliance of the "heavy" cartridge is low enough, you actually need a lightweight (read low effective mass) tonearm if you want to comply with the recommended rule for resonant frequency.

@daveyf 

Indeed the one I used was the Benz LPS with a weight of about 16g!  Of course I had to use a supplied second counterweight for the Tracer to balance, putting it just at the upper end of the Tracer range, which maxes at 17g.  To my ears, the LPS sounded lovely, and tracked quite well, albeit not as well as some other MCs I had in the past, such as the Lyra Delos, which apparently is not a good match for low mass tonearms.  I suppose there's theory and what actually works in practice.

Egregious error on my part.  In the post above gakerty's, I wrote, "In fact if the compliance of the "heavy" cartridge is low enough, you actually need a lightweight (read low effective mass) tonearm if you want to comply with the recommended rule for resonant frequency."

Obviously, I should have written "HIGH enough", not "low enough", in relation to compliance.  I just now spotted my error which was really careless.

@gakerty  Actually I think the Delos you mention may work well on a low mass tonearm. My Kleos works very well on my WTA 'Black' arm, which is a very low mass design. Tracking is no issue at all. OTOH, on the other thread, J Carr did mention that the extreme bottom end suffers a bit with the Kleos on low mass designs. I can well believe this, but I suspect that this applies to all cartridges on low mass designs. However, the upside to the match up is an absolutely amazing sound stage reproduction, possibly due to the inherent speed of the low mass design ( and of course, the liquid bearing helps).