Suppose you already own an audio interface that doesn’t provide enough gain to power up the Shure SM7B and not looking to purchase a new one. In that case, you will need a Cloudlifter (an inline preamp that provides a +25dB gain boost) to use in conjunction with your interface. The audio interface and the Cloudlifter CL-1 should work together to give your Shure SM7B the gain boost it needs.