In general, the Core Sound Omnidirectional MI microphones have a more natural frequency response and are easier to position. We recommend them first except when feedback or external noise is a problem -- then we recommend the Core Sound Cardioid MI microphones.

If you need a bass roll-off or a slightly emphasized treble response, we'd recommend the Core Sound Cardioid MI microphones.

If you prefer the Omnidirectional microphones but need to roll-off the bass response, please contact us. We can provide a battery box with a fixed bass roll-off filter at no additional cost.

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