The CMH8B has a single diaphragm with fixed cardioid polar pattern. This mic also has a built-in HPF to reduce unwanted lower frequency sounds such as footsteps and air-handler noises and a -10dB pad switch for high SPL instrument. The CMH8B is the middle priced unit for who do not need multi-directivity. These all-purpose studio-grade condenser microphones combine skillful workmanship with a 1-inch gold deposited diaphragm for the most vivid sound. There are a variety of optional accessories available to meet the requirements of almost all applications and settings.