Heil Sound is a US microphone manufacturer based in Illinois.
Some of the best-sellers include the large diaphragm dynamic end-address cardioid PR40, the super cardioid PR 31 BW, the super cardioid PR35 and the cardioid PR781 microphones.
Heil Sound PR40 Large Diaphragm Dynamic Microphone
Heil Sound PR77D
Heil Sound PR31 BW Dynamic Microphone
Heil Sound PR30 Large Diaphragm Dynamic Microphone