I don't really see a problem here. If 13 is a nickel, what else would you expect a small gold ring to be? 12?
9-13 seems like a reasonable (lower) range for gold rings.
The lower gold range of the AT Pro isn't any better aside from having better resolution. AT pro isn't going to get small chains which come up around 1-2 on the Equinox.
62 -- Nickel
61 -- Indian Head 1 Cent
60 -- Medium 9K Gold Ring
59 --
58 -- 18K Gold
57 -- Large 14K Gold Ring, 18K Gold
56 --
55 -- Mens Titanium Ring
54 -- Small 14K Gold Ring
53 -- Pull Tab, Buffalo Nickel, V Nickel, War Nickel, New Nickel, Small Charm, Medium 13K Gold Ring
52 -- Pull Tab, Buffalo Nickel, V Nickel, War Nickel, New Nickel, Small Charm
51 -- 100 Yen Coin (JPN)
50 -- 3 Cent Piece, 14K Gold Chain, 100 Yen Coin (JPN), 50 Yen Coin (JPN), Small 9K Gold Ring, Platinum Ring
49 -- 3 Cent Piece, 14K Gold Chain, 50 Yen Coin (JPN),
48 -- 14K Gold Chain, 14K Yellow & White Gold Ring, Titanium Ring, Platinum Ring
47 -- Large Junk Earring, Titanium Ring, Platinum Ring
46 -- Titanium Ring, Platinum Ring
45 -- Foil, Titanium Ring, Platinum Ring
44 -- Foil, Platinum Ring
43 -- Foil, Small 10K Gold Ring
42 -- Foil, Small 10K Gold Ring
41 -- Foil
If you are comparing to a CTX then, I can't argue.. you are probably correct, but that's a $2500 machine.