I just looked in the vinyl engine database and the Rega arms with specs have an effective mass of between 10 and 12 grams. The RB 300 that I have has an effective mass of 11.5 grams.
Using that number, you can use the vinyl engine resonance evaluator tool to figure out cartridges that are a good match.
For example a 10g cartridge will need a compliance of between 10 and 20 x 10-6 dyne/cm to be in the resonance sweet spot.
Pretty easy arm to work with, lots of options.
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Main System:
Amati Futura Mains
Amati Homage VOX Center,
Proac Response 1sc Rears,
Three MC2301's for L,C,R
MC 602 for the rears
C 1100, MX 151, MCD 1100, MR 80
Nottingham Dais with Wave Mechanic
Sumiko Palo Santos Presentation
SurfacePro 3, RPi 4, ROON, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC
MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material.
Lake House:
Ohm F, MC 275V, C2300, MR 77, Rega P3
OnDeck:
McIntosh MAC 4300v
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