The Cascade M39 is a cardioid condenser that has a 22mm diameter diaphragm. The Cascade M39 has a silky, open audio quality with a wide dynamic range essential for accurate, instrument recording and is ideal for use as drum over heads, hi-hat, snare, or acoustic instruments such as guitar and piano. The M39 features a high SPL rating of 137 dB and is capable of capturing even the loudest of audio sources. The M39 is a compact microphone that is great for recording a wide range of instruments and is in use in professional and project studios around the world.