Tough to tell exact depth, but it was at the bottom of the hole and below plug pull. Best guess is 7-8". Stock coil (which I think is awesome). Trashy old yard. 3 tone, 70 gain, 10 disc. Rang in solid 87 one way. Less solid 86, 87 other way, but was screaming dig me all the way. Really love this machine. Like to run it fairly amped up even in trash. It still sings to you through the noise and iron grunts. It grabs your ear when a good target is underneath.