The lup.X clamps on the string on a highly defined contact point. This makes the lup.X uniquely precise and effective against problem wolf-tones. It also does not contain materials like rubber. There are therefore practically no dampening effects – the instrument will keep its rich sound across its whole range. The lup.X is easy to mount and adjust. Its smooth shape and gentle brass finish give it a quiet elegance well suited to traditional bowed stringed instruments.