Simplex Optional Coils Now In Production

[Cormad]

Hi All, 

Newbie here, I've had my Simplex+ for a few days now and loving it so far. 

Can someone explain (in simple terms :)) why I would purchase the optional coils ? 

Located in Ontario Canada, searching for coins, jeweler and hidden treasures 

Jeff 

[Steve Herschbach]

Large coils cover more ground and get good depth on coin size and larger targets. However, when multiple items are under the coil at once, this can confuse the detector. A small coil helps better separate targets where they are close together, like a picnic area. Small coils also enhance sensitivity to smaller items like ear rings. The trade off is the small coil does not cover as much ground, or reach quite as deep, as the larger coil.

Lots of details and more reference material here