Garrett Ace 400 Metal Detector Review

Looking for a high-quality metal detector that is both easy to use and affordable? Look no further than the Garrett Ace 400! This detector has been designed with the beginner in mind, but still offers enough features and power to satisfy experienced users. In this blog post, we will take a closer look at the Garrett Ace 400 and see what makes it one of the best metal detectors on the market today.


The Garrett Ace 400 comes with the following equipment:

  • An 8.5″ x 11″ DD waterproof coil
  • Adjustable arm strap for reducing fatigue
  • Manual,
  • Garrett search coil hardware kit,
  • And 4 AA batteries.

Garrett gives away these accessories for free:

  • Garrett volume control headphones
  • control box housing to safeguard the housing from rain, dust, and mud,
  • And an 8.5″ x 11″ coil cover for protecting the search coils from scratches as you scan for metals.
  • The headphones are pretty standard. They have a volume adjustment knob on the wire that you’ll plug it into the bottom of the unit.


You don’t need any skills or a helper to assemble the Garrett Ace. All you have to do is follow instructions.

The assembly process is easy for beginners. You only need to loosen and tighten some parts in a short amount of time.

You will get the steps for setting up Garrett Ace 400 in the manual. If you are a visual person, you can watch Garrett’s instructional video on YouTube.

Usually, it takes about 10 minutes for a customer to set up an account and confirm it.


If you are expecting to receive a Garrett Ace 400, and it arrives damaged, you will be disappointed. If you have been using it and find that it is unresponsive, you will also be unhappy.

When you buy the Garrett Ace 400, you’ll want a replacement from the manufacturer if something goes wrong. That’s why it’s important to have a warranty that covers the main parts of the detector for 2 years. If there is a structural or internal defect, let the seller/manufacturer know.

Metal detection mode

Garrett Ace 400 has five search modes: ZERO-DISC, coin, relic, jewelry, and custom. Each mode detects different types of objects.

There are a few things that we need to discuss:

  • ZERO-DISC: This mode is for finding all kinds of metal, without picking and choosing which one you want. You would use this mode if you aren’t sure what type of metal you’re looking for, or if the signals from your target are inconsistent.
  • Coin: This is the mode you use to recover coins.
  • Relic: This is a tool used to find items that are not very conductive, like brass, bronze, and lead.
  • Jewelry: You will use this mode to find jewelry like bracelets, rings, and necklaces.
  • Custom mode:This is for anyone who wants to personalize the settings on their phone and find specific people or things.

Detection depth: How deep will the Garrett Ace 400 go?

The Garrett Ace 400 can help you find objects that are up to 12 inches deep. Most users say they found objects that were between 8 and 10 inches deep.

There are many factors that will affect how deep your device can reach, like the size of the object, the shape of the soil, and other things.

Search coil

Metal detectors have different coils, like concentric and D coils. The Garrett Ace 400 has a D-shaped waterproof coil that you can use on river beds or beaches.

The coil has two modes: a positive mode and a negative mode. The positive mode cancels out the metal detecting signal in less mineralized soils.

D coils are good at digging into the soil. They can also find targets better than concentric coils. The only problem is that they are not as sensitive as concentric ones.

If you don’t like the D coils, you can switch it for one that Garrett recommends.

Ground balance

One of the disadvantages of the Garrett Ace 400 is that it has a fixed ground balance setting. This means that you can’t manually adjust it to find your targets when there are many minerals in the soil or when your targets are close together.

However, that shouldn’t be a problem for you because the Garret Ace 400 works well in several soils. With practice, you’ll learn how to get the ground balance details right.

The machines that have manual ground balance settings are expensive. You can buy one later after you have learned how to use it and have leveled your skills.

Digital target ID

Garrett Ace 400 has a digital scale that tells you how much the target is worth. You should know how to use this information to find targets.

The scale is on the right side of the display. The ferrous items often fall on the left side of the scale, while the non-ferrous/conductive ones are indicated on the right side.


This equipment has a frequency of 10 kHz. This will help improve the sensitivity when searching for low and medium conductivity targets like lead and gold.

This metal detector is more expensive than the Garrett Ace 300 and Fisher F22.

This metal detector has a frequency that you can adjust to get rid of interference from power lines or WIFI. This is useful when you are looking for metals in groups because it avoids giving false signals.

Audio tones

The Garrett Ace 300 and the Garrett Ace 400 have three audio tones and an extra iron audio tone. These tones are sharp and responsive.

The three primary tones are:

  • Low tone. The reading lies between 0 and 32. It indicates you’ve found ferrous materials.
  • Medium tone. Your device will produce this tone if the reading falls between 33 and 75.
  • High tone. You’ll hear this sound when the reading is 75 and above. It shows you’ve found stuff like silver coins.

The iron audio tone is for finding discriminated iron targets. This will save you time from having to dig through things like bottle caps. You can control the tone with the power button.

The iron audio produces a unique tone that is different from the tone produced by the other metals. This tone is more of a scratching effect. The machine will show the readings on the screen, but you won’t hear an audio tone for the rejected objects.

Adjustable stem

The Garrett Ace 400 has a 42″ to 51″ adjustable stem. This means you can adjust the height to make it fit you, as well as your family members if needed.

The stem of the bike has plastic cam locks to make it more stable. You can adjust the height to make it more comfortable.

Overall, keep the metal detector shaft straight while you adjust it.


The Garrett Ace 400 is powered by 4AA batteries that last for 25-30 hours.

The batteries are in the back of the housing box. You’ll have to open the cover on the side to switch them if you need to.


If you have used Garrett detectors before, you will know about the Garrett Ace 400.

The device has a LCD screen display and well-labeled buttons. The buttons include:

  • Buttons for the search modes
  • Sensitivity button
  • Iron audio button
  • Frequency adjustment
  • Pinpointing button
  • Check/ enter mode. You’ll need it when using the custom mode.

There is a battery level indicator on the screen that tells you when to change the batteries.

The depth indicator is on the right side of the screen. It will help you measure how deep the water is. Remember, it is not 100% accurate, so the smaller items may be shallower than they seem and the bigger ones might be located deeper than indicated on the scale.


The Garrett Ace 400 is not a very heavy metal detector. However, it may become a little heavy after holding it for hours with your wrist and forearm. Its coil is quite large. A few customers also mentioned that it was a little heavy for them.

If you have back issues, you can find a metal detecting harness that is comfortable to wear for a long time. Or, you can look for a lightweight model that will not strain your back.

Performance: Is the Garrett Ace 400 a good metal detector?

The Garrett Ace 400 metal detector is good value for money. It is easy to use for most people. You can understand the buttons, even if you don’t know anything about detectors. But you will need some time to learn how the machine works.

Some experts say that the DISC method is good because it helps you recover your targets quickly.

The audio tones are loud and clear so that you can find what you are looking for. The best thing to use it for is finding coins, jewelry, and relics that are about 8″ to 12″ deep. However, it is not good for finding small pieces of gold.

Some people say that the Garrett Ace 400 works best on land. Other people say that it works well on beaches if you crank up the discrimination feature. But it is important to remember that different areas, like beaches, can give false readings.

What is the difference between garrett Ace 300 and Garret Ace 400?

There are some differences between the Garrett Ace 300 and Garrett Ace 400. But you may know that the Garrett Ace 400 is an improved version of both the Garrett Ace 300 and 350.

The Garrett Ace 400 has a 10 kHz frequency, while the Garrett Ace 400 has 8 kHz. This will help you find smaller targets better.

The two coils also work differently. The Garrett Ace 400 has a double D coil, while the Garrett Ace 300 has a concentric coil. The D coil is better at detecting depth than the concentric coil.

The Garrett Ace 400 costs around $340, while the Garrett Ace 300 is about $254.


  • Beginner-friendly
  • Accurate
  • Easy to set up
  • Great value for the price
  • Lightweight


  • Packaging needs improvement
  • No volume control on the device.
  • Loud audio tones
  • Affected by mineralization

Final Thoughts

This is the Garrett Ace 400 review. It is a good machine for finding coins, jewelry, and relics. It is not a good machine for finding small nuggets of gold. If you are serious about finding gold, get a machine designed specifically for that purpose.

The Garrett Ace 400 is a good metal detector for beginners and intermediates. If you are a teenager or adult who doesn’t want to buy a cheap toy, then this detector is for you.

Overall, Garrett Ace 400 is a good quality product that is affordable. However, if you need advanced features, you will have to pay more. If you plan to hunt for treasure in areas with highly mineralized soils, it might be worth spending more money on a better machine.

Read more: Metal Detector Discovery

Frequently Asked Questions About Garrett Ace 400 Reviews

Is Garrett at Pro Better Than Ace 400?

The Garrett AT Pro and Garrett Ace 400 are both metal detectors. The main difference between the two is that the Garrett AT Pro operates at a higher frequency (15kHz) than the Garrett Ace 400 (10kHz). This makes it better at detecting smaller, less-conductive objects like small gold pieces.

Is the Garrett Ace 400 Easy To Use?

The Ace 400 is a great machine for finding things. It is accurate and easy to use. The machine can find things that are up to 10″ long, depending on the size and conditions of the object.

Are Garrett Metal Detectors Any Good?

The Garrett – Ace 250 was the best metal detector in every category we tested when it came to finding coins, relics and gold. The Ace 250 was especially good at finding these items in sand and water.

Who Makes the Best Metal Detector?

The Garrett ATX is our top choice as it is one of the most advanced detectors in the world. Whether you’re looking for gold nuggets, coins, jewelry, or relics, this detector is a great choice for all terrains and conditions.

Is the Garrett 400i Waterproof?

The coil on the metal detector is waterproof, but the box isn’t. Make sure that water doesn’t get near the box because it could damage the electronic circuit. People think the Garrett ACE 400i is a really good metal detector. It is an improvement on all of its predecessors.

What Is the Easiest Metal Detector To Use?

The most popular metal detectors are the Nokta Makro Simplex, Garrett Ace, and Fisher F series. These detectors are easy-to-use. You don’t need to worry about advanced features. They will allow you to grow in to the hobby.

Are All Metal Detectors Waterproof?

There are many metal detectors that are not waterproof, but many new detectors have hit the market in the last couple of years that are. Some are made to withstand water up to 10 feet deep, while some can even go further down in the water than that.

How Deep Do Metal Detectors Work?

Most metal detectors can find objects that are about 4-8ʺ (10 – 20 cm) deep. In ideal conditions, a mid-range metal detector can find objects that are up to 12-18ʺ (30-45 cm) deep underground. Some specialized detectors can find objects as deep as 65′ (20 m).

What Is the Difference Between the Garrett Ace 200 and 300?

The Garrett Ace 300 is a good choice for people looking for more search modes than the Ace 200 and enhanced features to help find treasure. It has a built in pinpointing mode that quickly finds your treasure. It also includes headphones, an environmental cover, and a search coil cover.

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