≈ Minelab GPX-4000 Metal Detector ≈
 The Ultimate Gold Prospecting Machine  ...

The most powerful gold nugget hunting metal detector finally hit the market.  The new Minelab GPX-4000!

This is not an upgraded GP-3500. It is an entirely new class of gold machine, unlike anything the industry has ever seen before. It incorporates features and benefits unmatched by any detector ever offered to the general public. This is a radically improved model. You will need to read the instruction manual and use it yourself to fully understand the differences of this powerful detector.

Never before has Minelab offered a more versatile, technologically advanced, yet easy to use gold prospecting detector. The GPX-4000 has more power and performance than anything else on the market!

Read all about the new GPX-4000 Gold Nugget Metal Detector features below.  This unit comes with everything you need to get started, you don't have to purchase extra products or equipment.

Minelab GPX-4000 Rear Control Panel

Advanced Digital Control System - Provides more operator control and functionality allowing the GPX-4000 to be fine-tuned for all types of searching. Pre-programmed search modes optimize the detector at a flick of a switch for different situations, whether general searching, patch finding or chaining an area. Access to a number of new variable functions allows the operator to select their own combination of settings to gain the best possible performance.

LCD Function Display - The most obvious change to the GPX-4000 is the new LCD display on the rear of the control box. The user can simply scroll through the various functions and select the level required. All the variable level controls offer precise numeric settings for more accuracy. Gone is the inaccuracy of turning the control to "about 2-o’clock" - now you can compare the effect of different settings precisely and easily remember preferred levels, without the risk of settings being accidentally changed during transit or while detecting. All changes are saved automatically on shut down and reloaded when the detector is turned back on. The user can also restore the GPX-4000 back to factory pre-sets at any time.

Gain - The Gain is now a numeric function that precisely sets the overall sensitivity level. In areas where search conditions are mild, Gain can be increased. In areas that are more difficult, it can be reduced. Using the Gain control in combination with other controls like Timings, Audio and Ground Balance enhances performance to a level never before possible.

Sensitive / Smooth Timing - The GPX-4000 has two sensitivity options. The all-new Smooth option dramatically reduces signals from hot rocks and false ground noises, yet remains highly responsive to small targets. Depth on larger targets is sacrificed slightly, so in mild ground conditions the Sensitive timing found on previous GP detectors, now called Extra, is the preferred option as it will provide greater depth.

Ground Balance Type - In addition to normal ground balance the GPX-4000  has an optional Specific ground balance, designed especially for use in very hot ground and that is especially useful with Mono-loop coils.

Response – Serious gold hunters are familiar with the distinctive target signal from small nuggets; it tends to start in a rising tone and then drops to a lower one. Because there are usually more small nuggets than large ones, this target signal is quite familiar. The Response function allows the user to invert the normal target response so that when detecting deep ground for large nuggets, the target response is easier to hear and recognize.

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.

Minelab GPX-4000 Lithium Ion Battery

Volume Limit - Improvements have been made to allow potentially loud signals to be reduced without any loss of signal strength on weak, soft signals.

Lithium-Ion Battery - Minelabs new lightweight Lithium Ion batteries hold their charge at almost full power for over 12 hours. The intelligent charging system is self-contained in the lightweight aluminium housing, offering rapid recharge times of 3 to 4 hours, from either the 12v auto or AC outlet adaptor (both included). The power available can be tested at any time through the LCD display.

New Padded Comfort Belt - Included with the GPX-4000 is a new padded waist belt that makes wearing the battery harness more comfortable. A welcome improvement.

Why Should you purchase your new Minelab GPX-4000 from Rob's Detector Sales?


You Learn from a Professional Electronic Prospector (15 years field experience)


15+ Years Experience with the Minelab Metal Detectors (VLF & Pulse Induction)


I'm a Authorized Factory Dealer working directly under Minelab USA, Inc.


Free field instructions in a proven Arizona Goldfield by the dealer, not a field representative!


Lifetime Phone, Email, Forum and Field support if needed


Extremely high success rate on getting customers over their first AZ gold nugget(s)!


Free advice and valuable information on where to find gold in the future


Placed on a mailing list to update customers on newly released products


Minelab Metal Detectors and accessories always in stock


Can match or beat any Authorized Minelab dealers price!


Read what the customers have to say about me on my "Customer Feedback Page"

How to order the Minelab GPX-4000 Metal Detector?

Rob's Detector Sales accepts various methods of payment for Minelab metal detector and accessories.  I currently accept Visa, MasterCard, Paypal, Postal Money Orders, US Bank Cashier's Checks, Cash & Personal Checks (funds must clear before product(s) are shipped). 

To order a GPX-4000 using a Visa or MasterCard please call (623) 362-1459.  Please leave a detailed message if you don't catch me on the phone.  The winter prospecting seasons are very high volume and I promise I will return your call ASAP. 

To order the Minelab GPX-4000 by Postal Money Order, US Bank Cashier Check or Personal Check, please mail payment to -

Rob's Detector Sales
10740 W. Deanna Drive
Sun City, AZ 85373
(623) 362-1459

Order the Minelab GPX-4000 Metal Detector and Accessories Online using Paypal

Product Description

Retail Price

Your Price

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Minelab GPX-4000 Metal Detector
Includes everything you need to get started!
$5,000.00 $4,495.97


Other Accessories available for the GPX-4000
Extra Minelab Lithium Ion Battery $449.95 $349.97


AC Charger Plug-pack $44.95 $39.97


12v Car Charger Plug-pack $36.95 $29.97  
GPX Power Lead (Power Cord) $59.95 $49.97


GPX Battery Harness $89.95 $74.97  
GPX Waist Belt $59.95 $49.97  
Instruction Manual - GPX-4000 $8.95 $7.97  

Arizona Sales Tax - Price above don't include sales tax.  All Arizona residents must apply sales tax to their orders purchased.  Sales tax is not applied to out-of-state orders. 

FREE Bundle Package, UPS Shipping & Full Insurance - All Minelab GPX-4000's include (1) a bundle package (free searchcoil and accessories) will be (2) shipped FREE of charge using UPS Ground Services and include (3) FREE insurance for the total purchase value.  UPS does provide a tracking number to all package(s) that can be tracked online or by phone. 

Current Minelab GPX-4000 Package can be viewed here -

* If you don't like the current bundle packages, lets customize a package for your needs.

FREE Minelab Extended Warranty - All metal detector purchases come with a factory 2-year warranty.  However, all purchase will also include an additional 2-year warranty, for a total of 4-years on your new metal detector.

FREE Arizona Field Instructions - All metal detector purchases also include one full day worth of metal detector instructions in a proven, gold bearing location.  Instructions will include basic settings, gold geology, what to look for and advanced settings, tips and tricks.  There is an excellent chance you will find a gold nugget during the day worth of instructions.

If you would like more information or have questions about the Minelab GPX-4000 Metal Detector please feel free to email me at - auplacers@yahoo.com  or call me -

Rob's Detector Sales (Rob Allison)
Sun City, AZ
Call Today -  (623) 362-1459, 
Business Line
(602) 909-9008,

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Last modified: 01/016/08