Impulse AQ "Limited" came with a 12.5" coil, which is a good size for coverage and most open beach detecting.
However the sensitivity and depth of this coil gave me a hard time with pinpointing and therefore some difficulty in retrieving some targets.
But I did use all metal and a somewhat high sensitivity setting.
Gold prospecting on land is way different to wet beach detecting where the hole fill in very rapidly.
Managed to obtain an 8" coil which have proved to be easier to pin-point with and still have excellent depth.
This coil also work very well in Tone Mode (disc) on beaches that is usually unfriendly to PI detecting.