Allan that's too general a question. There are too many viriables. Sometimes a Sony C800G with an Api is the ticket. A Telefunken 251 with a Neve 1081 can do wonders. A U47 with a GML mic pre can fit the bill. The venerable U87 with a Focusrite Red mic pre or a Manley Voxbox can be it. Or you can do what Humberto Gatica does when tracking Celine, a handpicked Telefunken Elam 251, with a custom mic pre,DBX 160 and a GML8200. Every female vox is different, so your chain may vary. But all of the one's I've mentioned have worked over and over again. Hope this helps.