Sennheiser E 604 Cardioid Instrument MicrophoneThe Sennheiser e 604 Microphone is a rugged, cardioid instrument microphone that is specially designed to handle the high sound pressure levels of drums, percussion, and brass instruments without noise and peak distortion. The e 604 features a cardioid polar pattern that is effective in minimizing noise and feedback at the off axis sections of the capsule. The element features a neodymium magnet with boron, which yields a high output gain with low