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Coil Comparison On Qed X Coil Vs Rest

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Been a lot of chat about x coil for ML. I would like to see or read a good comparison on the X coil vs the rest on a QED. I am going on a trip to Western Australia in June, so I need a larger mid range coil. I have received advice that the 14" Coiltek is the coil  of choice. All the talk is about x coil, but there hasn't been any real comparison posted. I was thinking 15"x10" x coil could be a contender, but lack of comparison or direct info makes it hard to make a choice.

Correct me if I am wrong

8" Sadie = Small targets at shallow depth Low ground coverage

11" Detech Ultra = Small targets a little more depth bit better ground coverage

14" Coiltek = More depth start to loose smaller targets better ground coverage

15" x 10" = ??


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If someone sends me an x-coil I would gladly test it on the QED  😁   I promise I'll send it back!

If you were to go with the 15" X 10" x-coil you could possibly forego the 14" Coiltek and replace it with a 20" spoked Nugget Finder?  Being an older style bundle wound coil it should handle the ground better whilst also giving you a big foot print for patch finding, good depth and it runs nicely on a QED.  It is also surprisingly light and well weighted on the QED for its size.   

Between your 11" Detech and a 15" x 10" x-coil I'm not sure that the Coiltek would be filling much of a gap?  

Just my thoughts  😉

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1 hour ago, Northeast said:

If someone sends me an x-coil I would gladly test it on the QED  😁   I promise I'll send it back!

If you were to go with the 15" X 10" x-coil you could possibly forego the 14" Coiltek and replace it with a 20" spoked Nugget Finder?  Being an older style bundle wound coil it should handle the ground better whilst also giving you a big foot print for patch finding, good depth and it runs nicely on a QED.  It is also surprisingly light and well weighted on the QED for its size.   

Between your 11" Detech and a 15" x 10" x-coil I'm not sure that the Coiltek would be filling much of a gap?  

Just my thoughts  😉

G'day Northeast

If I were to loan you a 15x10 spiral x-coil to test on your QED what coils would you be comparing this coil against?

You would also have to guarantee return postage back to me.  I don't have a QED, I have a gpx4500 and I have had someone run a 15x10 spiral x-coil on there gpx5000 with excellent results, so good they bought the coil.and they were comparing it against NF evo coils which they really like.

If your interested then send me PM and we can make the arrangements

cheers dave

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11 minutes ago, davsgold said:

If I were to loan you a 15x10 spiral x-coil to test

Dave, that is a cracking offer and thanks.  However, the ‘what would I compare it to’ is the issue.  

A Sadie, a Detech 11” Ultra Sensing and a NF 20” Advantage are my 3 coils and really they cover  everything I need at present.  And I don’t even know anyone locally with comparable coils to the x-coil 15x10. 

It would be comparing apples with oranges so no real point unfortunately. 

Getting it back to you wouldn’t be an issue.  I will make some enquires and if things change I’ll let you know   👍


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I too would like to see more comparisons of the x coil vs others on the QED. I have an 8 in. commander and a 14 in. Coiltech elite. The elite is as large as is practical on the grounds I prospect in the Virginia mountains and is a very deep coil in the mineralized red clay I relic hunt in. I think an 11 in. X coil would round out options and be about right as an all around coil here in the US. The problem is finding a source for the coil at a reasonable price with the high cost of shipping from OZ.  Plus I would Like to know for sure it would top the 11 in. Coiltech elite before spending the extra money the x coil would cost.

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X-coils have shipping included in their price.  The price you see on the X-coils website is the price you'll pay to have it delivered.  The GPX/QED coils are $650 AUD with worldwide shipping included, there is no variance in price between sizes.

Comparisons of coils is such a difficult thing to do unless you're doing it yourself as different ground gives different results.

I have no problems burying a nugget or two and waving my QED or GPX over it and doing a video of the process with any coil you'd like to me to do it with out of my range of coils.  I do have mild soils, so it shows the coils being used in optimal conditions.

The coils I have available to do this are the Nugget Finder 14x9" Evo, Coiltek 10x5" Joey, 11" Commander Mono, Detech 15x8" Mono, 11" Commander DD and the 15x12" Commander DD so not an ideal collection of coils to compare against the spiral wound X-coils with the only competitive one being the NF 14x9" Evo.

The GPX/QED X-coils I have are 12x6", 15x14", 15x10", 10" Round, and 12" Round.

I've stuffed my back at the moment though so my days are spent on a chair until it recovers! 😞

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G'Day All

I see how a comparison Is going to be difficult. I suppose there are enough other comparison to show  us the capability of coiltek etc. With all the talk I have no doubt that x coils out perform equivalent coils. The problem for me and I suppose others is where do these coils fit into or current arsenal. The description on the QED website is quite generic.  $650 AUD is a choice that has to be as correct as possible. Couple of these coils and we are getting up into the realms of maybe I should have bought a second hand ML. (NArrhhh Aussie all the Way QED💪 QED💪 QED)

Even a comparison of x coils against themselves; from smallest to largest. Using a variety of small to large targets at different depth. To see where one coils starts and finishes and the next picks up/Overlap. We could all then see which coil fits into our current coils to fill a specific gap or capability.


Sorry to hear about your back phrunt. You seem to have to largest collection of x coils other than davgold

Northeast's air test of the 5c, 20c ,50c seems  to be quite consistent across QED and coils. Coins could be replaced with different size gold or do both.  Even this test of x coils smallest to largest at QED default or optimum settings (or both) for each coil could show some sort of start and finish\Overlap\Maximum depth distance. Different gold sizes will show what each coil can and cannot see. This test means no hole digging, done on a table, simple to setup and film.


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I will do something for you once my back gets better and video it, I've stuffed it a lot worse than I thought, it just started out as mild back pain from digging with my sluice, then a few days later I can hardly walk without massive pain and it's darn near impossible to sleep.  Weird.  Heat seems to work on it for some relief so it seems like a muscle problem, maybe I don't have enough of them to be digging for hours on end 🙂

What's Northeast's coin test? I'm happy to replicate that with various coils and then some nuggets with the QED for you.

If I was forced to pick any one coil out of the GPX X-Coil line up the decision would be the 10" round.  It's crazy sensitivity suits my needs for small gold hunting but of course everyone has different needs.   My closest match for a side by side comparison is the NF 14x9" EVO and the 15x10" X-Coil.

I understand it being a tough decision on buying any coil from anywhere though, I've bought coils I'll never use like the Detech 15x8" as I have coils far better than it and just don't see a reason I'd ever use it so it was a wasted purchase.  It's a good quality coil, but it's bundle wound and lacks the small target sensitivity I like in a coil, here you have to focus on small gold as it's a vast majority of the gold available to be found.

The problem with comparisons is nobody is likely to buy two coils from two manufacturers that are the same dimensions for the same reason you're struggling to work out what coil to buy, one of the two would be a wasted purchase and you'd only end up ever using one of the two.  I find the best way to judge coils or detectors effectiveness is to pay attention to the users of a particular product, enough happy users means the results must be good so just look for positive and negative reviews or discussions around a product to help decide.  That's my preferred method.  If any product is bad it doesn't take long for people to start complaining about it as they've spent good money to buy it.

The results I get on a test in the ground you're extremely unlikely to be able to replicate too due to my very mild soils.

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14 minutes ago, phrunt said:

What's Northeast's coin test? I'm happy to replicate that with various coils and then some nuggets with the QED for you.

Basically just put a coin say 5 cent  flat on the ground surface and video and swing the coil above the coin till it is out of range.

Note which coil, say start with smallest and its measured height working up to the larger coils repeating the same process and recording the measured height that it is detected at until it is out of detection range.

do all this the same day without moving the coin (whichever one you choose) so another person can replicate the same test using the same detector and the same settings etc, the only difference then being the location/ground and day.

This is not a perfect test by any means but it does give people a basic idea of different coils on a standard target (5 cent) as a 5 cent is a 5 cent and really won't vary much.

cheers dave

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Northeast test is just an air test on a table with a ruler under the coil. Select coil factory reset QED and wave target in front of coil to work out max distance of a good dig  signal and distance of maybe dig. You just end up with a table for the coil of distances for each target  in cm. Once done at factory default you could do the same for what you class as optimum settings for that coil.

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