Independently researched Detector Comparison
Garrett ACE 300 vs Garrett ACE 400
ACE 400 earns the upgrade through 10 kHz operation, Iron Audio and an 8.5×11-inch DD coil. ACE 300 retains the same basic five-mode, 0–99 beginner interface at 8 kHz with a smaller concentric coil.
Bottom line
ACE 400 is the better serious inland package; ACE 300 is the budget entry
Choose ACE 400 when the DD coil, higher frequency and Iron Audio justify the price gap for coins, relics and moderate mineralization. Choose ACE 300 for occasional parks and yards at a steep discount. Neither has manual ground balance, rechargeable power or a submersible control box.
Decision table
The differences that change the decision
| Factor | Garrett ACE 300 | Garrett ACE 400 |
|---|---|---|
| Frequency system | 8 kHz single-frequency VLF | 10 kHz single-frequency VLF |
| Waterproofing | waterproof coil only | waterproof coil only |
| Best fit | beginners hunting parks and yards | entry-level coin and relic hunters |
| Main advantage | simple 0–99 target ID and electronic pinpoint | Iron Audio and DD coil |
| Primary limitation | control box is not submersible | fixed ground balance and non-submersible control box |
Specific recommendations
Choose by terrain and operating style
Garrett ACE 300
simple 0–99 target ID and electronic pinpoint; best suited to beginners hunting parks and yards.
- 8 kHz single-frequency VLF
- waterproof coil only
- Limitation: control box is not submersible
Garrett ACE 400
Iron Audio and DD coil; best suited to entry-level coin and relic hunters.
- 10 kHz single-frequency VLF
- waterproof coil only
- Limitation: fixed ground balance and non-submersible control box
Decision analysis
What actually changes the purchase
ACE 300 operates at 8 kHz and commonly uses a 7×10-inch concentric coil. ACE 400 moves to 10 kHz and an 8.5×11-inch DD, improving ground coverage and offering a better general geometry in mineralized soil.
Both provide Zero-Disc, Jewelry, Custom, Relics and Coins modes, 0–99 Digital Target ID, electronic pinpoint and four AA batteries. Their shared preset ground balance is the technical ceiling.
Iron Audio is the 400’s meaningful control addition, letting users hear discriminated iron to evaluate caps and mixed responses. It does not transform the machine into an SMF beach detector.
FAQ
Targeted questions answered
What frequencies do ACE 300 and ACE 400 use?
ACE 300 uses 8 kHz; ACE 400 uses 10 kHz.
What stock coils do they use?
ACE 300 commonly includes a 7×10-inch concentric; ACE 400 an 8.5×11-inch DD.
Does ACE 300 have Iron Audio?
No. Iron Audio is a key ACE 400 upgrade.
Do both have electronic pinpoint?
Yes.
Can ground balance be adjusted manually?
No. Both use preset ground balance.
Are the control boxes waterproof?
No. Their search coils are waterproof, but the control housings are not submersible.
When is ACE 300 the better buy?
For occasional mild-ground use when it is substantially cheaper and the DD coil/Iron Audio are unnecessary.
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Buy for the sites you actually hunt
For Garrett ACE 300 vs Garrett ACE 400, the correct choice is the one whose ground handling and controls solve the conditions you face repeatedly.
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