Garrett Ace 400 vs Nokta Simplex Ultra: What to Check Before You Buy

If your hunting stays on dry ground, the Garrett Ace 400 is the simpler pick. If you want one detector that can handle wet grass, muddy edges, shoreline use, or shallow water, the Nokta Simplex Ultra is the stronger match.

Quick answer

The split is not subtle. The Ace 400 leans into straightforward dry-land use. The Simplex Ultra brings waterproofing, rechargeable power, and more room to hunt in mixed conditions.

The real difference

What to check	Garrett Ace 400	Nokta Simplex Ultra
Water use	Dry-ground use	Waterproof to 5 m, so wet grass, muddy edges, and shallow water are in play
Power	4 AA batteries	Internal rechargeable battery
Operating frequency	10 kHz	15 kHz
Control style	Simpler layout	More controls and more flexibility

The first question is water, not brand. If water is part of the hunt, the Simplex Ultra moves ahead fast. If you never leave parks, yards, school fields, or other dry sites, the Ace 400 avoids extra upkeep you do not need.

The frequency gap matters too, but it comes after site access. The Simplex Ultra’s 15 kHz setup gives it more reason to be there if you care about small or low-conductive targets. The Ace 400’s 10 kHz setup still fits general dry-land hunting well enough when the job is straightforward.

Where the Garrett Ace 400 fits best

Pick the Ace 400 if your hunts stay in:

parks
schoolyards
fields
yards
other dry sites

It makes sense when you want a simple control layout and a battery setup that is easy to understand. Four AA batteries are hard to beat for familiarity and quick swaps.

It also suits a beginner better when the goal is to keep the first detector easy to learn. Fewer controls usually mean less hesitation before a hunt starts.

Skip the Ace 400 if water exposure is part of the plan. Once wet ground becomes normal, the machine stops matching the job.

Where the Nokta Simplex Ultra fits best

Pick the Simplex Ultra if your hunts include:

wet grass
muddy edges
creek banks
shoreline sand
changing weather
shallow water

Waterproofing is the big reason to choose it. It gives you more places to hunt without treating every damp patch like a problem.

Rechargeable power is the other part of the appeal. If you do not want to keep buying and carrying AA batteries, the internal battery is a cleaner ownership setup.

The 15 kHz frequency also gives the Simplex Ultra more reason to be in the mix when small or low-conductive targets matter.

Skip the Simplex Ultra if you only hunt dry parks and want the least complicated setup possible. Waterproofing is useful only when you actually use it.

What to decide before buying

A few checks matter more than the badge on the side.

Decide where you actually hunt. Dry parks and yards point to the Ace 400. Wet grass, shorelines, and mixed weather point to the Simplex Ultra.
Decide how you want to power the detector. AA batteries are simple to replace. Rechargeable power removes battery shopping but adds charging.
Look at the control layout honestly. If fewer controls help you get started faster, the Ace 400 has the edge.
If you buy used, inspect the battery compartment, shaft locks, coil cable, seal surfaces, and buttons.
Look at the coil and shaft setup as a whole, not just the control box.
Pay attention to the parts that make normal use easy, not just any extras that happen to come in the box.

Condition matters more than cosmetics on a used detector. A tight shaft, clean battery compartment, and solid cable routing are more important than a few scuffs.

Common mistakes to avoid

Do not buy the waterproof model just because it sounds more capable. If your hunts stay dry, you are taking on extra upkeep for no gain.

Do not buy the Ace 400 for water use and hope it will be fine. It is the dry-ground option in this comparison.

Do not choose only by frequency. The Simplex Ultra’s 15 kHz setup matters, but water access and site type matter first.

Do not ignore the shaft, cable, and battery compartment on a used unit. A detector with sloppy hardware becomes annoying fast, even if the electronics are fine.

When neither one is the right pick

Skip both if you hunt saltwater surf, heavy black sand, or harsh mineralized ground every week. Those conditions call for a detector built for that kind of work.

Skip both if you want the simplest possible starter machine and you never hunt wet ground. A basic land-only detector with fewer controls may be the better place to start.

Simple buying rule

Choose the Garrett Ace 400 if your hunting is dry, simple, and mostly about getting out there without extra setup.

Choose the Nokta Simplex Ultra if you want one detector that can move from dry ground to wet ground without changing plans.

FAQ

Is the Garrett Ace 400 the easier detector to learn?

Yes. Its simpler control layout gives it the edge for first-time users who want fewer things to think about.

Is the Nokta Simplex Ultra better for beach use?

It is the better choice for wet sand, splash exposure, and shallow water. For saltwater surf or difficult mineral conditions, a detector made specifically for beach work is the safer pick.

Does rechargeable power matter?

It matters if you want to stop buying AA batteries and prefer charging before a hunt. It does add one more step to your routine.

What should be checked on a used detector?

Battery compartment condition, shaft locks, coil cable, seal surfaces, and buttons. On the Simplex Ultra, the waterproof areas deserve extra attention.