I am presently working on the development of DIY Active Cardioid Monitors. I posted a report at LinkedIn. Here's the link.
https://www.linkedin.com/pulse/copy...ry-n848c/?trackingId=+MAR40ZvL7hGwenNyP4KAQ==
https://www.linkedin.com/pulse/copy...ry-n848c/?trackingId=+MAR40ZvL7hGwenNyP4KAQ==