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Minelab GPX 4500

   (2 reviews)

Steve Herschbach
  • Price: $2699 Freq: Pulse Weight: 5.3 lbs Waterproof?: No Current?: Yes

The Minelab GPX 4500 detector was released in 2008 and is still in production. The GPX 4500 is a pulse induction (PI) metal detector aimed primarily at the gold prospecting market but which has become popular also with relic hunters. Note that the sale price of this model normally includes two search coils, an 11" round DD plus an 11" round mono coil.

"Return of the Legendary Gold Detector! The versatile GPX-4500 is a proven gold finder with many features and great performance. Incorporating Minelab’s superior Multi Period Sensing (MPS), Dual Voltage Technology (DVT) and Smart Electronic Timing Alignment (SETA) technologies it penetrates mineralised ground better and deeper than basic PI detectors." Source: Minelab website

Minelab GPX 4500 metal detector

Minelab GPX 4500 controls

  • MPS, DVT & SETA technologies for superior gold detecting performance.
  • 2 coils supplied: 11-inch Double-D for general use AND 11" Monoloop for deeper detecting
  • Versatile Timing settings for various ground conditions. The Enhance timing is a powerful feature, similar to the Sensitive Smooth timing, but provides an improvement in the depth and signal response on small and large targets alike. The Sharp timing is more suited to quieter soils and can also help to pinpoint faint targets.
  • Six pre-programmed search modes for easy switch-on-and-go detecting. All six search modes can be modified with your favourite settings and renamed.
  • Stabilizer control for the smoothest threshold. In noisy conditions, turning it down will provide you with a smoother threshold. In quiet conditions, increase the stabilizer and faint target signals will be more obvious.
  • Ground Balance OFF for neutral soils. This is a useful feature for very benign low mineralised or salt saturated soils. This setting will also work well for treasure or relic hunters in loam or sandy soils.
  • Backlight with adjustable time-out to preserve battery life.
  • Target Volume allows you to increase the strength of softer target signals. This is useful in windy conditions, for people suffering from hearing loss, and to adjust the audio volume when using external speakers. This can also provide an audio boost in mild soils, and can be used to smooth out ground noise signals in highly mineralised soils.
  • The Iron Reject function allows you to set the desired level of discrimination, from cautious to aggressive. This enables detecting in areas with high levels of ferrous junk.
  • Built-in amplifier so you can hear soft target signals from deeper nuggets, more easily. The Li-lon battery pack includes a built-in audio amplifier, allowing you to use an external speaker without the need for any external booster.

Official Minelab GPX 4500 Product Page

Minelab GPX 4500 Owner's Manual

Minelab GPX 4500 - Steve's Review

Forum Threads Tagged "minelab gpx"

Minelab Metal Detector Forum


Edited by Steve Herschbach

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   3 of 3 members found this review helpful 3 / 3 members

A lot can be said of the GPX 4500, it's found huge amounts of gold around the world, for me it's been a learning experience, coming from using VLF's with their screens displaying VDI numbers and so on using a GPX can be a bit daunting but once you learn the machine and get used to how to operate it the machine really comes into its own.  It's quite simple to setup once you understand the settings and what their purpose is, it needs configured to optimal settings for the area your searching.

It can find remarkably small gold, not quite that of a high frequency VLF or the GPZ 7000 but getting there, especially when using the modern flat wound coils from manufacturers like Nuggetfinder, and that brings me to the biggest selling point of the GPX, the MASSES of coils available for it,  It's one of the reasons why people who own a GPZ still hold onto their GPX series detectors, the huge selection of coils for different purposes.  From small to huge, there is a coil for every occasion.

It's a little heavy but has mitigation from that with a bungy you attach, it however requires you be strapped to your detector and harness as it's battery is so big you wear it on the harness on your back, it's the thing I like the least about the detector having to be wired up to it.  You can't just sit it down and walk off, you have to unplug yourself.

It's a very capable machine and in the right hands can be a gold magnet.  It has a few negatives, mostly weight and being tied to the detector but it's gold finding ability, especially at depth and coil selection more than makes up for it.

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Mxt Sniper

   2 of 2 members found this review helpful 2 / 2 members

I really like and recommend the GPX 4500, fair learning curve but once you got a handle on it, its a very very versitile machine. Does well on small gold with the new Elite and Evolution coils, my favorite coil on this machine is the NF Evo 14x9 its so sensitive I can get a #9 birdshot at 3" with no problem, my best nugget so far is a .55 gram at a solid 8" in medium ground with the 14x9. With my round solid 14" Elite Coiltek coil I can hit a 1.3 gram nugget at 12"-13" in mild to medium soil, I keep it simple with the two flat wire wound coils and a factory  DD 11" along in case of emi or wet ground.

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