Back in the analog console days, you automatically achieve the heft and weight in the recordings without exerting an effort. Kazrog’s True Iron was created to imitate the sound of transformers that we love in a plugin form to give us that “big iron” sound.
The plugin is very straightforward. There is a Morph button which allows you to adjust the even-order harmonics using the Strength control. True Iron is a low CPU footprint plugin by design. It is intended to be used on every track and/or buss in a mix in the signal path before other processors in order to mimic the input stage of analog equipment.
Read more about this here: https://bobbyowsinskiblog.com/2019/07/01/kazrog-true-iron-plugin/