This is the hardest mallet of the line. Similar to a flannel mallet, it provides the necessary articulation, but is easier to roll with. Carefully balanced, with a slightly heavier weight relative to the size of the head, this mallet has plenty of articulation but retains a big sound.
Based on a round cork core, machined flat at the equator, with two contrasting under-layers and a final covering of German felt, these mallets offer a wide range of timbres, including velvety rolls on the tips.
20B has a multi-layered felt structure similar to the 24B, however it is heavier and has a larger core in order to provide the necessary volume and sound one needs in the romantic repertoire like Strauss or Tchaikovsky. The felt is layered in a way that above a mezzo-forte dynamic the mallets produces great articulation but a beautiful, full and warm sound.
I use this mallet for every pp to mf roll I encounter. It is slightly lighter than the MR20B or MR24B, but has an even and soft felt feeling to it. However, it also has a clear sound that works perfectly to underline a pizzicato -- for example on the 3rd movement of Mahler's First Symphony.
“Light Roller”: This model works perfectly for loud rolls on higher pitched notes. The complex multi-layered felt provides many different colors, depending on the dynamic level and tension of the head.
"Heavy Roller": Especially useful for low notes like one would encounter in Bruckner Symphonies, this perfectly balanced mallet produces the biggest and fullest sound a player would ever need in an orchestra.