Garrett ACE 400i Metal Detector Review

The Garrett brand has earned itself quite the reputation among metal detectors. The ACE model line, in particular, has proven to be quite a handy little detector. With the Garrett Ace 400i, the company has claimed to have produced the “king of ACEs”.

The reviews of the product have been quite positive, so let’s see if this metal detector has really merited this considerable title. This is a well-known product because it’s reliable and affordable with a good reputation.

Garrett 400i metal detector
  • Total Weight : 2.6kg or 5.8 pounds
  • Batteries: 4 AA 20+ Hour Battery Life
  • New Iron Audio: allows user to hear discriminated iron
  • New Digital Target ID: 0 to 99 scale offers target information
  • New Adjustable Frequency
  • New! Includes Pulse-Width Modulation audio: sharper, more responsive audio

Design and Appearance of the Garrett ACE 400i

In terms of the design, the Garrett ACE 400i looks a lot like the other ACE models with the exception of a cross-shaped coil. This metal detector consists of a shaft, a PRO Performance 8.5″ x 11” DD coil, and a 400i control box. The shaft ends in a comfortable arm rest that comes equipped with an adjustable Velcro strap. There is also a coil cover available which can be snapped on with ease.

This model is also armed with the Garrett Clearsound Easy Stow Headphones with an inline volume switch. The 400i comes out of the box in three separate parts with the coil, the straight shaft, and the s-shaft separate from one another. You will need no other tools than the ones provided with the metal detector to put it together.

With your arm in the armrest, it is very easy to man the buttons. You are able to easily adjust the controls with just the movement of your thumb alone. The digital display allows you to keep careful track of all of the functions of the metal detector.

In addition to the comfort factor, the other advantage with the ACE 400i is the weight. Weighing in at just 1.32 kg, you are definitely not going to get tired carrying this detector around. But, it is not recommended for kids, see the best metal detectors for kids here. It also has an adjustable length of 1.06 metres to 1.29 metres.

This is the ideal machine to take with you if you are planning on spending a considerable amount of time out in the field.

Buttons and Modes of the Garrett ACE 400i

Garrett-ACE-400iThe Garrett ACE 400i comes furnished with six different buttons. These are the Power/Iron Audio, Pinpoint, Frequency Adjustment, Discrimination, Sensitivity, and Mode. These are accompanied by a LED display on top. The LED display shows the Mode Indicator, Target ID Legend, Digital Target ID, Target ID Cursor, Lower Scale, Depth Indicator, Sensitivity Setting, and battery level indicator.

The metal detector can be powered by simply pressing the Power button for one second and then releasing it.

Using the Mode buttons, you can scroll through five different modes. These are:

  • Zero-discrimination: detects all types of metal
  • Jewellery: designed to find necklaces, rings, and bracelets while rejecting iron-based objects
  • Custom: to be programmed by the user with settings being saved. Start with discrimination pattern and then use DISCRIM along with Accept/Reject to customize the mode.
  • Relics: avoids iron while picking up objects with lower conductivity such as bronze, lead, and brass.
  • Coins: programmed to find most types of monies while rejecting foil and iron. Certain unnecessary objects such aluminium cans may be detected.

The Sensitivity buttons can be used to either increase or decrease the sensitivity of the metal detector. There are eight sensitivity levels present.

The Discrimination button is used in conjunction with the Accept/Reject button to ensure that trash is rejected.

The Power button also doubles as the Iron Audio button. By pressing this button, you are able to hear discriminated iron.

The Pinpoint button is used to help narrow the location of a possible object. It is pressed over the suspected location of a target.

Features and Performance of Garrett ACE 400i

Garrett-ACE-400

The Garrett ACE 400i comes packed with a lot of new features for the ardent explorer. The first feature is the Iron Audio which allows the user to hear the normally silenced discriminated iron. This way, you will not be digging for undesirable objects. Even better, the mid-tone range can actually be altered. This way, different iron objects will produce different sounds allowing the user to distinguish between them. The iron resolution is stated to be at least twice as powerful as the ACE 250.

The other function is the Digital Target ID with a 0 to 99 scale. This allows the user to better identify the objects being picked up. There is also a higher frequency of 10 kHz, allowing objects with lower conductivity such as gold to also be detected. The frequency is also adjustable, meaning that there will less interference when using the ACE 400i. This model also comes equipped with a new Pulse-Width Modulation for more responsive audio.

The old features such as the pinpointing, coin depth, variety of modes, and sensitivity options are still as good as ever. Combined, these not only help you to find targets that you actually want, they also help to narrow down the location. All of these functions help to cut down the amount of time that it takes to find what you are looking for. The discrimination features reduce the likelihood of picking up non-metal items or other pieces of junk.

Pros and Cons of the Garrett ACE 400i

Pros:

  • Incredible sensitivity
  • Greater distinction between iron objects
  • Fast recovery time
  • Great value for money
  • Good battery life
  • Lightweight
  • Comes with attachments

Cons:

  • Audio volume cannot be adjusted on the machine – only on the headphones
  • The detector is less reliable around high mineralised soils

Final Verdict
Everyone seems to agree the Garrett ACE 400i really can do no wrong. This detector really is an improvement on all of its predecessors. In addition to having great sensitivity, users are also now able to distinguish between different types of iron. One of the major advantages is the price – for all the advanced features that you get, it really is somewhat of a bargain.

Not to mention, you actually get additional attachments to go along with the metal detector. This is definitely a nice little surprise for the price you are paying. The complaints about this detector are far and few. In fact, you are pretty much scraping the barrel.

If you want a high-quality, dependable metal detector, the Garrett ACE 400i is definitely the one that you should be counting on. You will certainly not regret your decision.
Steve Race

I’m one of the founders of this blog. A 31 yr old from Lincolnshire & proud father of 3 beautiful children. My first metal detector was a garret ace 150 but I am currently using the ace 400i. My best find was a roman coin. Feel free to ask me any questions.

Click Here to Leave a Comment Below

ken - February 12, 2017

This detector is a very good machine it is better when you listen to the tones rather than looking at the id.If you only get one bell tone and not a double bell tone i would advise you
still dig i have had some deep coins using this method.

Reply
kenneth rawcliffe - March 2, 2017

You are very welcome steve

Reply
Mario - March 18, 2017

How do you think works on The Beach?

Reply
    Steve Race
    Steve Race - April 17, 2017

    Hi Mario,

    Thanks for stopping by.

    The 400i is waterproof and is suitable for dry beach and careful fresh water detecting. It comes with a waterproof submersible searchcoil but the machine itself is not fully waterproof.

    Reply
kenneth rawcliffe - April 17, 2017

You will need to keep reducing your sensitivity till the detector is more stable when detecting on wet sand then turn it back up when in the dry sand.

Ken.

Reply
Yvonne - May 13, 2017

Thanks for the review – I’m looking at this model for use on the banks of the Thames in London, primarily because of the ability to screen out the huge amounts of iron and it is lightweight and waterproof. Is this the best choice for the terrain as the banks range from mud to puddles to wet sand and gravel?

Reply
    Steve Race
    Steve Race - May 15, 2017

    Hi Yvonne,

    Yes, you are right this is one of the best models but keep in mind that the machine itself is not fully waterproof. And since you plan to use it in London where the humidity is pretty high and the weather is constantly changing, I suggest you use something better like Garrett AT Pro.

    It has better functionality and you could use it in water up to 3 meters so you won’t have a problem with it. Here’s my review on it http://www.thedetectorist.co.uk/garrett-at-pro-reviews/

    Reply
Kornel - July 6, 2017

Hi Steve,
Thanks for the nice blog. I am thinking to get the 400i as well. I would use it mainly for meteorite hunting. Is it good for that?
Kornel

Reply
    Steve Race
    Steve Race - July 28, 2017

    Hi Kornel,

    Meteorite hunting would be great with this model because you can distinguish different types of iron with it.

    Reply
Gideon - July 28, 2017

Hi Steve
Will I be able to set the machine to detect all metal objects. Like when I’m on a beach somewhere , where people drop coins and jewellery all the time. I’m thinking off baying a Garret Ace 400I
Hope to hear soon from you

Reply
    Steve Race
    Steve Race - July 28, 2017

    Hi Gideon,
    Garrett Ace 400i is a little more advanced for a novice, but I think you can get used to it pretty fast. This model is great when it comes to beach metal detecting, but please beware that it’s not fully waterproof, only the coil so you’ll have to make sure you don’t drop it in the water.
    You’ll have no problems with this model because it’s lightweight and it can find all sorts of jewelry on the beach.

    Reply
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