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:smoke:Some Interesting Comparison Data GTI 2500 + ACE 150 + ACE 250 + AT Pro International:smoke:

John-Edmonton

John-Edmonton

Moderator
Staff member
I did some more air tests. All tests performed on same set up in room, with a moderate swing speed of the target. Reading were measured at the most notable repeating audio signal, rounded off to the nearest half inch. The GTI 2500 used the true all metal mode & the others zero discrimination.

No real surprises, except that SNIPER COIL gets exceptional depth. I knew from my own experience that the depth was good, but I never actually measured the depth in any way. I am going to have to get me one for the AT Pro.
And, as in all air tests, they were done for comparison reasons only. Depths expected out in the field will vary considerably, due to (but not limited to) the following:

-Mineralization
-Moisture
-how target is orientated in the soil
-human error
 
Hey, good job John...I was gonna do a similar test when I get an AT PRO. You beat me to it..as usual..ha. :rage:

The good news is, the GTI 2500 is still KING!. Thats is nice results on the gold though. I'm thinking in hot ground the AT PRO will prevail on the 2500's stock 9.5 coil and that is where the AT will shine!

However, the GTI 2500 with the new 8.5x11 coil might do just as well except a tad less results on low conductors than the AT PRO.

The GTI 2500 in all metal might still be the depth king, but the audio features and fast recovery of the AT PRO gives it an edge in certain hunting situations like Civil War Relics.

Imaging vs Pro Audio.....interesting. I like both!

Nice test!

Alan
 
Unfortunately, the AN node of the GTI 2500 is all but unusable where I hunt (I tried it). I wonder how the GTI fares when it's in zero disc. vs the others. ..Willy.
 
The GTI is a real versatile machine, that's for sure. If you add a bigger coil, you probably add a little more depth, as is the same with the other detectors. Sometimes buying a new type and or size of coil is almost like buying a new metal detector with the new changes that you inherit. The 2500 has been around for a long time, and it seldom comes up for sale on the classifieds. There are reasons for that. :thumbup:
 
Useless in am even with manually ground balancing it and utilizing the fast track? Man Willy, what kind of terrain does BC have? I am sure that there would be a depth loss in motion discriminate zero discrimination. But it's an excellent coin/jewellery finder because of it's Imaging.
 
It is a pretty unfair comparison to compare all metal mode to a discrimination mode.

What about discrimination mode on the 2500 compared to that of the AT Pro? I mean that is apples to apples.

I rarely use AM mode and from reading the forums, VERY FEW people ever use it, maybe just the seasoned hunters.
 
I use the all metal mode almost exclusivly in the 2500...master it and you will get results. It it just to powerful to ignore, but some cant get a hold of it I guess. If you dont use it you might as well just use a 1500.

Alan
 
Huh? Where have you been? I use the true all metal mode more then the motion discriminate. It has the greatest depth potential, plus still gives you a probable conductivity. Reading the forums doesn't give you an accurate account of what's really going on with the users. Probably over 98% of metal detector purchasers, and that's being very conservative, don't even post their finds let alone their experiences on the Internet. What we see on the forums is only the tip of the iceberg for finds. It's a hobby, and is meant to be enjoyed. :)

Unfair? At what?..Gathering statistical data is an infinite composition. What you see is one thin slice of some data. It is what it is, and how you interpret is entirely up to you. And by the way, for what it's worth, It was comparison data to compare the maximum depth potential of the individual machines using different targets. Some people consider depth to be the one most important feature when looking at a metal detector.
 
I have used all metal mode on my Omega but only on occasion, because there is so much iron in the ground in Germany (and Europe for that matter). There is just too much to hear and then to watch on the VDI. I do use it sometimes when I find a target to further investigate it. Perhaps I really don't know how to use it, but I did learn on a Nautilus IIB so think I have a decent understanding.

It would be more valid to compare discriminate modes is all I was saying - Really, just to mention apples to apples was really my point. I'm not against showing all data, clearly as I don't have an AT Pro but am interested how it stacks up.

It's too bad more people don't post their findings, in particular comparison of units, which isn't allowed on the sponsored forums here. Think we can do it on the main metal detecting forum though.

Anyway, to answer your question, guess I've been in Germany (for too long now). :starwars:

edit - Forgot to ask, if so many people use all metal mode, why didn't they include it on the AT Pro (or is running no discrimination the same - depth wise?)
 
"Forgot to ask, if so many people use all metal mode, why didn't they include it on the AT Pro (or is running no discrimination the same - depth wise?)"

I'm not sure....maybe they didn't want to put all their bells & whistles into one detector. And with you living in Germany, do you find a lot of war relics? There used to be a fellow who used his GTI 2500 in Germany and posted his relics and hunting sites. He had some real cool finds. I haven't heard from him for a couple of years.
 
I don't know what a lot of other people bought the GTi-2500 for but I bought it to properly ID targets in disc just like my grand master hunters and ADS 7 but the 2500 DOES NOT ID in disc as deep as my grand master hunter, as everyone knows in all metal a detector ID's
the closest target to the coil no matter what, myself I not going to dig a boat load of junk just in hopes of it properly ID ing a coin. and by the way I have tried hunting in all metals and it ID's wrong 90% of the time and I am not digging 90% junk for any coin. HH:detecting:
 
I found quite a few interesting Nazi relics. I have also found 30 or so musket balls from the 30 year war as well. Some medieval rings but none of the relics have much value. (Some of the old coins I have found do though). At first, finding the Nazi stuff (badge type things, coins) was really interesting as coming from America we only read about that. But then it hit me that people followed Hitler hook line and sinker (and he actually started out with a good cause). There was so much killing associated with that time and I have actually talked to people that were alive then, so my perspective has changed. Hard to describe but now I don't enjoy finding Nazi stuff, it's just such a dark period. But, I wouldn't mind finding other relics. The BIG problem is you don't want to dig larger targets as there are still bombs in the soil for sure. I think I found a grenade once but covered it back up real quick before I was 100% sure. So, I only dig coin sized signals for the most part!

My detector now is an Omega, I sold my T2 cause the Omega seemed to hit better on coins than the T2 (version 6). The 8kHz frequency of the Omega is not the best for relics. I only get those musket balls down to 4" or 5" and they hit really iffy (can often call it). They both excelled in iron but the T2 was CLEARLY a top notch relic machine. Seems like the AT Pro is just behind it speed wise and perhaps the iron audio feature makes it actually better to some folks. I am really really interested in that as I love a full sound after having that Nautilus.

I'm looking at the AT Pro as a coin machine, but also one that will hit on jewelry and the occasional relic (as there is some cool stuff in this old country). Since the AT Pro with it's 15kHz frequency hits equally well on the conductors, I think it might be a really good coin machine. I think it would go deeper than my Omega as well, but there is not much mineralization at all in the soil, so I get strong hits on coins at around 6" but think the AT Pro might get more and a few of my coins hit really soft at around 7" or 8" and think I might be missing some coins beyond that.

I wonder if the AT Pro with no discrimination is close to an AM mode? Even cheaper units have an all metal mode, but the AT seems really deep for a $600 machine so perhaps you are correct in that they didn't want to cut off their own nose by losing higher priced unit sales.

ps - Thanks for the kind words JohnLA and btw if LA means Los Angeles I was in San Diego before Germany... miss the surf.
 
John-Edmonton said:
I did some more air tests. All tests performed on same set up in room, with a moderate swing speed of the target. Reading were measured at the most notable repeating audio signal, rounded off to the nearest half inch. The GTI 2500 used the true all metal mode & the others zero discrimination.

No real surprises, except that SNIPER COIL gets exceptional depth. I knew from my own experience that the depth was good, but I never actually measured the depth in any way. I am going to have to get me one for the AT Pro.
And, as in all air tests, they were done for comparison reasons only. Depths expected out in the field will vary considerably, due to (but not limited to) the following:

-Mineralization
-Moisture
-how target is orientated in the soil
-human error
Click to expand...

Great work, how do you ground balance GTI 2500 & AT Pro International to make sure it's an apples-to-apples test? To ferrite or?

I know the ACE 150/250 has fixed ground balance. Please forgive me if this is dumb question since I've never used either.
 
I just used the default setting for the true all metal mode in the GTI 2500 & Pro mode in the AT Pro. Ground balancing methods can be found in each of the manuals. It's too time consuming to explain for both on here.

http://www.garrett.com/hobbysite/hbby_manuals.aspx
 
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