We add a receiver "Boost" circuit that adds about 2" to 2.5" recovery depth in the discriminate mode. This modification will allow your older unit to perform better than the newer "PRO" model.

We can add a much needed external "Ground Balance" control, it's a necessary addition for any serious detecting.

We add a external "Threshold" control for aiding in all metal hunting.

Boost circuit : This is a boost circuit we add to the receiver circuit, and it gives approximately 2" to 2.5" of depth improvement in the discriminate mode.

NEW Classic III "Pro"

Ground Balance: This will give you the ability to externally adjust your ground rejection as conditions warrant. This will aid in depth.

Threshold: This gives you a external adjustment of the threshold level you hear in the all metal mode, and ground balance procedures. Set properly to just hear a soft tone in your headphones will aid in finding those deep targets.

Boost: We "tweak" the sensitivity a bit on the "Pro" while we have it apart on the bench.