contraforte

The contraforte () is a proprietary instrument with a range similar to the contrabassoon produced by Benedikt Eppelsheim and Guntram Wolf. It is intended to have improved dynamics and intonation over the distinctive but sometimes reticent sound of the conventional contrabassoon. The contraforte uses a different and wider bore than the contrabassoon to produce a distinct tone; the sound is more even in strength and intonation across registers, remaining quite strong into the high register, unlike a contrabassoon. Also, it lacks the distinct "rattle" of a contrabassoon, although an appropriate reed design can replicate this effect where desired.

Wolf and Eppelsheim developed an accurate bore taper and precise key works in order to simplify fingerings despite the instrument's large size.