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Prepping for a Maui beach hunt

mntnflyr4fun

Active member
My new manticore invited me to Maui for two weeks and of course I accepted......

Does anyone have any input on coils? I purchased the 3 coil setup last fall.... so have the m8, m11, m15...should I be looking at the M9? Seems like I already have good coil coverage but if there is coils magic I am missing I am all ears.
Also, I hope to get off the beach and into the surf a bit and wondering what headphone are going to work, especiallly if I do a bit of snorkle detectoring...... Do wireless even work in the water?? I currently own just the minelab wireless that came with the machine.

Sorry for the stupid questions but haven't been on the beach or surf before and seems like such a great opportunity I would like to start getting prepared now and practicing with any new equipment I need. The trip is this fall so I have lots of time on my hands to get started.

Any operations tips etc. also gladly accepted.

Thanks all in advance
 
The wireless headphones will not work if the detector is submerged and they are not waterproof either!!
I doubt they are even water resistant.
I use a set of Thresher waterproof headphones and then work great!
Many other headphone options out there too.
Can’t help with coil selection, but sounds like you already have a good assortment.
Good luck on you on your trip!!🤞🤞
 
Black sand / volcanic beaches…would be nice to know ahead how the Manticore deals with that. Detecting in the surf or even calm water is a practiced skill and equipment matters. You’d be good to ask questions in the beach and water forum. I’m sure you’ll get the feedback you seek.
Good luck!
 
Get the large coil- Deeper and cover more surface for recent drops because I would guess these beaches are pounded hard
 
I pulled the trigger on a pair of custom Tony Eisenhower submersible headphones....almost had the Threshers in my cart when I got derailed by feedback from some users of these.
$195 for the enhanced version of the "wader" series, delivered. A bit more scratch, but pretty much everything I saw was positive so thought I would give them a try. If you are in the market for submersibles you might want to take a look.

Still not decided on an bigger coil, the coiltek mythtek 18 sounds good, but not sure I can swing that beast.... m15 might be as heavy as I can handle, besides needing a sand scoop with breakdown handle which appears to going to suck up another 150 to 250 bucks. Any opinions on a scoop that can go in luggage? I have been looking at the ckg with two piece carbon fiber handle..... many sizes to choose from and not sure what I need, Gut says to go big.....

 
I have no first hand experience with the Manticore on beaches with heavy black sand, most detectors do not do near as well as a PI.
That being said I would take my ATX and leave my Manticore home. Lets hear from others with experience in the Black Sand of Maui.
As for the headphones wireless will loose connection when the detector control box is submerged. Got to go with wired waterPROOF
headphones. I use the Gray Ghost brand.
Good luck on your trip... May the ring of gold be in your ears and its glitter in your scoop. WW
 
Just for fun, I let a couple AI searches come up with some data on how the manticore might perform in black sand with saltwater, following is the the response from one such search, not sure how trustworth, but added information thats for sure.

"The Minelab Manticore is a high-performance metal detector designed for versatility across various environments, including beaches with challenging conditions like black sand and saltwater. Black sand, often rich in iron minerals like magnetite, and salt groundwater can create significant interference for metal detectors due to their conductivity and mineralization. Based on its design and user feedback, here’s how the Manticore handles such conditions:
The Manticore features Multi-IQ+ technology, an advanced version of the multi-frequency system found in earlier Minelab models like the Equinox. This allows it to operate across multiple frequencies simultaneously, improving its ability to distinguish targets from mineralized ground and saltwater. In black sand environments, single-frequency VLF detectors often struggle with falsing (false signals) or loss of depth, but the Manticore’s multi-frequency approach helps mitigate these issues by balancing sensitivity and stability. It can adapt to the ground’s conductivity, reducing noise from the black sand and salt.
Users have reported that the Manticore performs well in wet saltwater environments, such as the surf zone, when properly configured. For example, settings like "Beach Low Conductors" mode with a recovery speed of around 4, sensitivity between 26–30 (depending on conditions), and adjusted ferrous limits (e.g., upper 4, lower 0) have been recommended for wet salt and black sand beaches. Ground balancing near the water’s edge—ideally where the sand is damp but not submerged—also helps the detector lock onto the specific mineralization and salt content, improving stability. However, attempting to ground balance while fully submerged can be tricky, as the consistent saltwater environment provides less contrast for the detector to calibrate effectively.
That said, black sand’s heavy mineralization can still pose challenges. In areas with thick layers of black sand, some users note that the Manticore may require reduced sensitivity (e.g., dropping from 30 to 27 or lower) to avoid excessive falsing, particularly if the ID readings hover around 1–2, which is typical of saltwater interference. The detector’s ability to run higher sensitivity than competitors (like the Equinox) offers a depth advantage, but in extreme black sand conditions, it might not eliminate all noise without careful tweaking. Switching to a smaller coil, like the M8, can also improve performance by reducing the amount of mineralized ground the detector "sees" at once, enhancing target separation.
One potential issue arises in saltwater when the coil connector at the control box gets splashed intermittently. Some users have reported instability in these scenarios, possibly due to a "floating ground" design, though this is less about black sand and more about saltwater exposure. Keeping the connector dry or fully submerged (rather than in the splash zone) typically resolves this.
In summary, the Manticore handles black sand and salt groundwater well compared to many detectors, thanks to its multi-frequency tech and customizable settings. It’s not immune to challenges—thick black sand deposits or heavy salt may still require adjustments—but with proper ground balancing, sensitivity tuning, and mode selection, it performs effectively in these tough conditions. For the best results, experiment with settings and consider a smaller coil in extreme black sand areas."

AI is turning out to be pretty useful in aggregating lots of internet postings etc.
 
Did you ask AI the same question about the ATX or Infinium? it would be interesting.
 
Did you ask AI the same question about the ATX or Infinium? it would be interesting.
Here is a response on the ATX via AI .
I am convinced after using AI for information over the last month or so that it will quickly become the detectorists best friend providing summarized data on all aspects of detecting from machine setups, to specific location performance, machine comparisons, you name it..... Fast start to answers to just about anything a person would want to ask..... totally cool, except of course it's propensity for world domination:oops:

"The Garrett ATX performs exceptionally well on black sand beaches, making it a standout choice for detectorists facing challenging, mineralized conditions. As a pulse induction (PI) metal detector, it’s designed to handle highly mineralized environments—like black sand beaches—where VLF detectors often struggle due to interference from iron-rich minerals and saltwater. Its ability to maintain depth and sensitivity in these conditions is a key strength.
The ATX features automatic ground balancing, known as Ground Track, which continuously adjusts to changing mineralization levels. This is particularly useful on black sand beaches, where the concentration of minerals can vary widely even within a small area. For best results, you can manually ground balance by holding the GND BAL button and moving the coil between 1 to 6 inches above the sand until the ground response stabilizes, though the automatic feature often suffices for inconsistent black sand patches. In areas with heavy black sand, keeping discrimination low or off maximizes depth, as cranking up discrimination can reduce sensitivity to smaller or deeper targets.
Users have noted that the ATX excels in wet sand and shallow surf zones where black sand mixes with saltwater, offering stable performance and good depth compared to VLF detectors, which often lose effectiveness in such conditions. It’s not uncommon for the ATX to detect targets like gold rings or small coins at depths that other machines miss in mineralized sand. However, it’s a PI detector, so it doesn’t discriminate as precisely as VLF models—expect to dig more trash like bottle caps alongside treasure. The Iron Check feature helps somewhat by identifying ferrous targets, but it’s not foolproof.
The ATX’s waterproof design (up to 10 feet) also makes it ideal for working the waterline or submerged areas where black sand often accumulates. Its weight—around 7 pounds—can be a drawback for long sessions, but the telescoping shaft and balanced design help mitigate fatigue. For black sand beaches with basalt cobbles or volcanic rock, the ATX has been praised for tuning out hot rocks and maintaining stability, a feat that sets it apart from non-ground-balancing PI detectors like earlier White’s Surf PI models.
In short, the Garrett ATX is a top performer on black sand beaches, offering deep detection and reliable operation in tough conditions. It’s best suited for those willing to dig all signals and master its settings to unlock its full potential.
The Garrett ATX performs exceptionally well on black sand beaches, making it a standout choice for detectorists facing challenging, mineralized conditions. As a pulse induction (PI) metal detector, it’s designed to handle highly mineralized environments—like black sand beaches—where VLF detectors often struggle due to interference from iron-rich minerals and saltwater. Its ability to maintain depth and sensitivity in these conditions is a key strength.
The ATX features automatic ground balancing, known as Ground Track, which continuously adjusts to changing mineralization levels. This is particularly useful on black sand beaches, where the concentration of minerals can vary widely even within a small area. For best results, you can manually ground balance by holding the GND BAL button and moving the coil between 1 to 6 inches above the sand until the ground response stabilizes, though the automatic feature often suffices for inconsistent black sand patches. In areas with heavy black sand, keeping discrimination low or off maximizes depth, as cranking up discrimination can reduce sensitivity to smaller or deeper targets.
Users have noted that the ATX excels in wet sand and shallow surf zones where black sand mixes with saltwater, offering stable performance and good depth compared to VLF detectors, which often lose effectiveness in such conditions. It’s not uncommon for the ATX to detect targets like gold rings or small coins at depths that other machines miss in mineralized sand. However, it’s a PI detector, so it doesn’t discriminate as precisely as VLF models—expect to dig more trash like bottle caps alongside treasure. The Iron Check feature helps somewhat by identifying ferrous targets, but it’s not foolproof.
The ATX’s waterproof design (up to 10 feet) also makes it ideal for working the waterline or submerged areas where black sand often accumulates. Its weight—around 7 pounds—can be a drawback for long sessions, but the telescoping shaft and balanced design help mitigate fatigue. For black sand beaches with basalt cobbles or volcanic rock, the ATX has been praised for tuning out hot rocks and maintaining stability, a feat that sets it apart from non-ground-balancing PI detectors like earlier White’s Surf PI models.
In short, the Garrett ATX is a top performer on black sand beaches, offering deep detection and reliable operation in tough conditions. It’s best suited for those willing to dig all signals and master its settings to unlock its full potential.
 
I think th Hawaii black sand is not iron based like normal black sand. I believe it is made of volcanic rock
 
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