Yes and I'm not sure what your point is? Some detectors run at the edge of stability as the default, I point to the Fishers and Deus as examples, and that is great for most relic hunting. It is a nightmare in a trashy park. Some people call it being "chatty" but it comes from the detector set to a high sensitivity with factory default setting. Some factory set machines are very conservative, Whites for example, and are very stable and take some adjusting to achieve maximum sensitivity and depth. Some are set very aggressive, Fishers for example, and tend to be very noisy even in the factory default. The upside is they are also more sensitive and deeper, but have less room to improve that sensitivity.