I believe that the RB300 is actually about 11 grams effective mass.
I think that the standard RB300 will work fine with the Lyra, or the Benz, and would need a bit of additional mass for the Shelter. Some people use the DIY HiFi mod to very good effect for this.
I think that the standard RB300 will work fine with the Lyra, or the Benz, and would need a bit of additional mass for the Shelter. Some people use the DIY HiFi mod to very good effect for this.