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Equinox Update Tested 4kh Vs Multi On Deep Silver

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I haven't tried 4 kHz yet.

In my test garden, 15 kHz has always gotten the best depth on silver coins. I've always thought that super low frequencies were only useful for finding deep caches and/or large targets and not practical for detecting single isolated coins.

I liked how 4 kHz sounded on those silvers in the video and the way it gave high numbers and tones. I wonder if your EMI might have something to do with your results.

My test garden has no EMI or mineralization. I'll try to get out there later today and see how 4 kHz does in my soil.


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I have always had better results with 7 kh than 19 kh with the Deus on deep silver... Lower freqs have always smacked silver in my garden better. My understanding has always been lower freqs better on silver....Notice the lower freq lost the gold coin and higher smacked it....Higher freq gold= lower silver...

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Good video, Calabash!

A couple takes from your video: the single frequency mode of the Nox won’t utilize Iron Bias feature, so that’s probably why your friend was having problems digging more iron than normal when he used 4 KHz mode.

Also an important Question for you: Why are you using Park 2 for your main operating mode for coin hunting?

While in Multi frequency operation, Park 2, as I have gathered from various resources, is internally higher frequency weighted toward finding fine jewelry, along with other lower conductive targets, while Park 1 is internally lower frequency weighted for high conductive targets (i.e. silver coinage).  This is internally programmed in the software by Minelab.

I never use Park 2 for deep silver or other higher conductors.....but if you want to find fine jewelry and other low conductors, Park 2 would be a better choice..

From Minelab’s writeup on Multi-IQ:

low frequencies (e.g. 5kHz) are more responsive to high conductors (e.g. large silver targets) and high frequencies (e.g. 40kHz) are more responsive to low conductors (e.g. small gold nuggets)...

I consider US silver dimes  and silver quarters as high conductive targets...and why as a deep coin hunter, I hunt in Park 1 100% of the time.

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2 hours ago, calabash digger said:

I have always had better results with 7 kh than 19 kh with the Deus on deep silver... Lower freqs have always smacked silver in my garden better. My understanding has always been lower freqs better on silver....Notice the lower freq lost the gold coin and higher smacked it....Higher freq gold= lower silver...

I would like to see a  x-terra with the 15" 3kz. coil in  your test garden.If you check out findmall in the  x-terra section you  will see a lot of information on 3kz. for silver coins.

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Very interesting info, Phrunt!  Thanks for posting!

some of my deeper targets in Multi actually ID higher than they do when those same targets are shallower....that’s actually a good thing for me...I won’t be passing up any targets that ID 30 or higher.......but, I concur with you that single frequency ID’s aren’t as accurate as Multi ID’s in general.

just the other day, I found my first ever 60% silver Japanese 100 Yen coin...that ID’d as a solid 22 on my Nox..

I’ve also found a few of your 3-pences here in So California...very rare though here!



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I tested 4 kHz in my test garden yesterday and was pleasantly surprised how well it performed on deep silver. All this time I thought the lower frequencies were not useful for coin hunting. I normally hunt in 15 kHz and never really looked closely at 5 and now 4 kHz.

4 kHz hit my 12" dime and 15" quarter. The higher frequencies won't even pick these coins up. It didn't register a number but it gave a tone that I would dig. I got a slightly better sound in 4 kHz than 5 kHz.

I was using Field 1, Sense 24, Recovery 4. 

Field mode is better than Park in my soil, or at least in my test garden.


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