For default 5 tones on the 800 and 600 the tone breaks are:
1. -9 to 0 (+2 in the Field modes for coke)= lowest iron tone,
2. +1 or +3 to +9 = medium low tone for small gold, small aluminum, small lead, small tin,
3. +10 to +19 = medium tone for larger gold, lead, US nickel, brass, aluminum, small copper, some zinc penny,
4. +20 to +29 some US zinc penny, copper penny, clad dimes, silver dimes, some clad quarters, small silver jewelry,
5. +30 to +40 high tone for some US clad quarters, silver quarters, halves, dollars (including Presidential, Sacajawea, and Anthony) large silver jewelry.
It is possible to adjust the tone breaks on the 800 to create a 3 tone or 4 tone configuration. It is also possible to change the pitches for any assigned tone in each tone break along with its individual volume level.................really versatile flexibility to personalize detector settings.
Jeff