southwind, I believe the eagle spectrum has tone ib is that correct? I had one years ago. only had it a short time an sold it an got a xlt. I regreted it, because the spectrum went deeper.the last hunt with it I got a nickel signal, said 7.5 inches.signal was fairley weak but good an repeatable. by the way I had the six inch coil on it. an it was a true 7.5 inches, I believe it would have gotten it at 8.5 inches. Ive had my dfx now fow 13 years, and ive never gottin that deep with it. I was going to buy one on this fourm,but was sold before I got back to him, yesterday so know im looking for another.