Welcome to the forum!
I've used the Outback model, it's very similar to the 1100. I even learned a few new tricks with it. Such as "bobbing" the coil to help ID iron trash or rusty can slaw. I was also able to detect a quarter very near an aluminum can and iron junk and discern the difference between the can and coin, both of which usually gave a high tone, but the can held the tone longer and farther from the coil.
I found a rapid scan actually enhanced depth in my air tests. A quarter gained at least a half inch to an inch in depth by rapidly moving it across the coil. I also noted that smaller targets got a boost in signal strength with a faster sweep. Best depth on most coins in my ground was between 5 and 6 inches.
Like most any other BH detector, when you disc out a segment, it's gone. I really had a hard time sweeping a disced-out target in any way that made the unit false. If a rusty nail made a random mid-tone beep with iron disced-out, for example, the good old bob technique was totally quiet. I'd be pretty certain with that to eliminate digging most nusiance iron.
By using the various levels of discrimination, it was easy to eliminate all but coin signals. Accepting only high tones, I was able to knock out all of my test junk targets, but clearly detect pennies, dimes, quarters and above. This would seem to be an ideal cherry-picking coin-hunting mode; leaving unheard all nails, foil, pulltabs, caps and other common junk items. The loss of nickles and potentially jewelry is a choice we'd each have to make when hunting a given spot.
I could see where, with a little practice, there is much to learn about its responses to various targets. It seems fairly rapid in response and there does seem to be some nuance in tone.
Hope this helps!
-Ed
