The GPX-4000 is a versatile, easy to use, gold prospecting detector that has the ultimate in power and performance. The LCD display on the rear of the control box allows you to scroll through the various functions of the detector and select the level required. All the variable level controls offer precise numeric settings for more accuracy. You can compare the effect of different settings precisely and easily remember your preferred levels without the risk of settings being accidentally changed during transit or while detecting. All setting changes are saved automatically on Shut Down and loaded up when you switch the detector on, then at anytime you can restore back to the Factory Preset settings.
Koss 100 ohm, 1/4-inch plug headphones, Lithium-Ion - 7.4 VDS battery, battery charging system, and standard 11-inch Double-D coil included.
Pre-Set Search Modes - Patch Fining, General & Deep Detecting - Different search techniques require different settings on your detector to give maximum performance for best results. If you're out patch finding over virgin ground and your priority is to cover more ground at a faster sweep speed, you need a detector with fast target response, sharp clear signal and possibly fast ground tracking. However, carefully chaining an area that has already produced nuggets requires an entirely different set of settings. The GPX-4000 offers three pre-programmed search modes already set up for the three common search techniques. These search modes are patch finding, general detecting and deep, slow, careful detecting. As you get more familiar with your all the functions of the GPX-4000, it becomes easier to program your own preferred settings for each technique or search mode.
More functions of the GPX-4000 include:
Gain: The Gain function sets the overall performance level of your detector. In areas where the search conditions are mild, you can increase the Gain, and in areas that are more difficult it can be reduced. You'll find using the Gain control in combination with other controls like Timings, Audio, and Ground Balance will enhance the performance to its ultimate potential.
Sensitive / Smooth Timing: The GPX-4000 has two sensitive options. The Smooth option dramatically reduces signals from hot rocks and false ground noises, yet remains highly responsive to small targets. In mild ground conditions, the Sensitive Timing option provides greater depth.
Ground Balance Type: The GPX-4000 has an optional Specific ground balance designed specifically for use in very hot ground and is especially useful with Mono-loop coils.
Response: The response function allows you to invert the normal target response so that when you're detecting deep ground for large nuggets, the target response from a big nugget is easier to hear, as it will be the familiar target signal you're used to hearing.
Motion: Different sweep speeds demand different software so that the detector can give the best results. The Motion function allows the operator to indicate their intended sweep speed to provide the best threshold stability and target response for that sweep speed.
Volume Limit: Loud signals are reduced without any loss of signal strength on weak, soft signals, even on very low settings.
