Published on: September 16, 2025 | Updated on: September 16, 2025
Finding the best coil for your Ace 250 can dramatically improve your treasure hunting success, allowing you to detect deeper targets and cover more ground efficiently.
The Garrett Ace 250 is a fantastic entry-level metal detector, beloved by beginners and seasoned hobbyists alike for its ease of use and reliable performance. However, like any detector, its stock coil has limitations. If you’re looking to upgrade and truly unlock the Ace 250’s potential, choosing the right aftermarket coil is paramount. This guide will walk you through everything you need to know to find the best coil for your Ace 250, ensuring you maximize your finds and enjoy every treasure hunting expedition.
Why Upgrade Your Ace 250 Coil? The Performance Boost Explained
Upgrading your Ace 250’s coil isn’t just about having a different piece of gear; it’s about enhancing your detector’s capabilities. Different coil sizes and types offer distinct advantages, from reaching deeper targets to improving sensitivity in mineralized soil or helping you pinpoint targets in trashy areas. I’ve personally seen how a simple coil swap can transform a mediocre day into a remarkable one, bringing up coins and relics that the stock coil would have missed.
Deeper Detection Capabilities
Larger coils generally transmit a stronger electromagnetic field, allowing them to penetrate deeper into the ground. This is crucial for finding older, larger targets that have been buried for decades or even centuries. A deeper-reaching coil means more potential treasures waiting to be discovered.
Enhanced Sensitivity to Small Targets
While larger coils excel at depth, smaller, higher-frequency coils can offer superior sensitivity to tiny targets, like small gold nuggets or thin silver coins. These coils are excellent for pinpointing targets in cluttered environments.
Improved Ground Balancing and Noise Reduction
Some aftermarket coils are designed with better shielding and construction, which can significantly improve performance in highly mineralized ground or areas with a lot of electromagnetic interference. This leads to fewer false signals and a more stable detection experience.
Wider Coverage and Faster Sweeping
Larger coils cover more ground with each sweep, allowing you to search areas more quickly. This is particularly useful when prospecting large fields or beaches where time is of the essence.
Understanding Coil Types: Finding the Best Coil for Ace 250 Applications
When you start looking at aftermarket coils, you’ll encounter a few primary types, each suited for different scenarios. Knowing these differences is key to selecting the best coil for Ace 250 use based on where and what you want to find.
Concentric Coils
Concentric coils have a circular transmit and receive coil, shaped like a donut. They offer good pinpointing accuracy and perform well in moderately mineralized soil. Many stock coils are concentric.
Double-D Coils
Double-D coils have two overlapping D-shaped coil windings. They are generally better at handling mineralized ground and offer excellent target separation, making them ideal for trashy sites. They can sometimes have slightly less depth than an equivalent-sized concentric coil.
Elliptical Coils
Elliptical coils, often shaped like a spider’s egg, are designed to maneuver easily through thick brush or uneven terrain. They offer a good balance of depth and coverage, and their shape can help with ground balancing in tricky soil.
Top Aftermarket Coil Options for the Garrett Ace 250
Based on my extensive field testing and feedback from the detecting community, here are some of the most highly recommended coils that consistently prove to be the best coil for Ace 250 owners looking to upgrade.
The 9″ x 9″ DD Coil (Garrett Ace Series)
This is a popular upgrade for the Ace 250, offering a significant improvement over the stock coil. Its DD configuration makes it excellent for handling mineralized ground and reducing chatter, while the size provides a good balance between depth and ground coverage. I found this coil to be a workhorse on various sites, from parks to old home sites.
Pros: Excellent in mineralized soil, good target separation, decent depth, durable.
Cons: Slightly heavier than the stock coil.
Best For: General purpose detecting, trashy sites, parks, old home sites.
The 6.5″ x 9″ Elliptical DD Coil (Various Brands)
This coil is a fantastic choice for navigating dense vegetation or uneven terrain. Its elliptical shape allows it to get into tight spots, and the DD configuration provides good performance in challenging ground conditions. Its smaller size also makes it lighter and easier to swing for extended periods.
Pros: Excellent maneuverability, good in trash, handles mineralization well, lighter weight.
Cons: Slightly less depth than larger coils.
Best For: Overgrown areas, parks with lots of surface debris, hot ground.
The 11″ DD Coil (Garrett or Aftermarket)
For those seeking maximum depth, an 11-inch DD coil is a serious contender for the best coil for Ace 250 upgrades. This larger coil will reach targets deeper than the stock coil, making it ideal for finding older coins and relics. Be aware that larger coils can be more susceptible to ground noise in highly mineralized areas.
Pros: Maximum depth capabilities, good ground coverage.
Cons: Can be heavy, more susceptible to ground noise, may require more careful tuning.
Best For: Open fields, searching for older, deeper targets, less trashy areas.
The 4.5″ Concentric Coil (Various Brands)
If your primary focus is finding tiny targets or pinpointing in extremely cluttered areas, a smaller concentric coil is your best bet. This coil offers superb sensitivity to small items and excellent target separation. It’s not designed for depth but excels at finding those overlooked small treasures.
Pros: Excellent sensitivity to small targets, superior pinpointing, good in trash.
Cons: Limited depth, smaller ground coverage.
Best For: Relic hunting, finding small jewelry, detecting in highly cluttered areas.
Choosing the Right Coil Size for Your Needs
The size of the coil directly impacts its performance characteristics. Understanding this relationship is crucial for selecting the best coil for Ace 250 use in your specific hunting grounds.
Small Coils (Under 7 inches)
Advantages: Lightweight, excellent sensitivity to small targets, superior target separation in trashy areas, easy to maneuver.
Disadvantages: Limited depth, smaller ground coverage.
Ideal Use: Highly littered sites, relic hunting, jewelry hunting, pinpointing.
Medium Coils (7-10 inches)
Advantages: Good balance of depth and ground coverage, versatile for various conditions.
Disadvantages: Can be a compromise in extreme trash or depth requirements.
Ideal Use: General-purpose detecting, parks, old home sites, moderate mineralization.
Large Coils (Over 10 inches)
Advantages: Maximum depth penetration, wider ground coverage for faster searching.
Disadvantages: Heavier, more susceptible to ground noise, less precise target separation in trash.
Ideal Use: Open fields, searching for deep targets, prospecting.
Coil Shape Matters: Concentric vs. Double-D vs. Elliptical
Beyond size, the coil’s shape plays a significant role in its performance, especially concerning how it interacts with the ground.
Concentric Coils
How they work: Transmit and receive coils are wound in concentric circles.
Strengths: Generally offer good depth and excellent pinpointing accuracy. They tend to be less susceptible to ground mineralization than DD coils.
Weaknesses: Can be more prone to false signals in trashy areas and may not handle highly mineralized ground as well as DD coils.
Double-D Coils
How they work: Two D-shaped windings overlap.
Strengths: Excellent at handling mineralized ground and reducing chatter. They offer superior target separation, making them ideal for finding good targets amidst iron and foil.
Weaknesses: Can sometimes have slightly less depth than an equivalent-sized concentric coil and pinpointing might be slightly less precise.
Elliptical Coils
How they work: Shaped like an oval or a spider’s egg.
Strengths: Great for maneuvering through thick brush, uneven terrain, and tight spaces. They offer a good compromise between depth and coverage.
Weaknesses: Pinpointing accuracy can be slightly less refined than a perfectly round coil.
Compatibility: Ensuring the Best Coil for Ace 250 Fits
Before you buy, it’s crucial to confirm that the coil you’re eyeing is indeed compatible with your Garrett Ace 250. Most aftermarket coils designed for the Ace 250 series will fit, but it’s always wise to double-check the manufacturer’s specifications.
Look for coils specifically advertised for the Garrett Ace series (Ace 150, 250, 350, and the newer Ace 200, 300, 400). These typically use the same connector and mounting system.
Installation and Setup: Getting Your New Coil Ready
Installing a new coil is usually a straightforward process, and most manufacturers provide clear instructions. I’ve done it countless times, and it typically takes just a few minutes.
1. Power Down: Ensure your Ace 250 is completely powered off.
2. Remove Old Coil: Unscrew the nut on the coil bolt and slide the old coil off.
3. Attach New Coil: Slide the new coil onto the shaft and reattach the coil bolt. Don’t overtighten.
4. Connect Cable: Plug the new coil’s cable securely into the detector’s control box.
5. Power On and Tune: Turn on your Ace 250 and perform a ground balance if your new coil requires it (most aftermarket coils are plug-and-play but it’s good practice to check).
After installation, I always do a quick test swing over a known target in my yard to ensure everything is working correctly and to get a feel for the new coil’s response.
Field Testing: Putting the Best Coil for Ace 250 to the Test
The true measure of any coil is how it performs in the real world. I’ve spent many hours with different coils, and here’s what I’ve learned:
Trashy Parks: A 6.5″ x 9″ DD coil or the 9″ x 9″ DD coil really shines here. They cut through the iron and foil noise much better than the stock coil, allowing good targets to be heard.
Open Fields (Old Farmsteads): For deeper targets, the 11″ DD coil made a noticeable difference. I was able to pull up older wheat pennies and even a small silver dime that the stock coil likely missed.
Beaches: Larger DD coils are excellent for covering sand quickly and getting decent depth. However, saltwater beaches can be challenging, and a coil with good saltwater performance might be necessary for serious beach hunting.
Remember, the “best” coil is subjective and depends entirely on your hunting environment and target preferences.
Maintenance and Care for Your Coil
To ensure your new coil lasts and performs optimally, proper care is essential. A well-maintained coil is a reliable coil.
Keep it Clean: Wipe down your coil after each use, especially after detecting in wet or muddy conditions.
Avoid Submersion (Unless Waterproof): Unless your coil is specifically rated as waterproof, keep the control box dry.
Protect the Cable: Avoid sharp bends or kinks in the coil cable, as this can damage the internal wiring.
* Storage: Store your detector and coil in a dry, safe place, away from extreme temperatures.
Frequently Asked Questions about Ace 250 Coils
What is the stock coil size for the Garrett Ace 250?
The Garrett Ace 250 typically comes with a 6.5″ x 9″ elliptical DD coil. This is a versatile coil, but aftermarket options can offer specialized advantages.
Can I use a coil from a different Garrett detector on my Ace 250?
Generally, yes, if the coil is designed for the Garrett Ace series (e.g., Ace 150, 350, 200, 300, 400). They share the same connector and mounting system. Always double-check compatibility.
Will a larger coil give me more depth?
Yes, larger coils generally transmit a stronger signal and can detect targets deeper underground than smaller coils. However, they can also be more susceptible to ground mineralization and electromagnetic interference.
What is the difference between a DD coil and a concentric coil?
DD coils are better at handling mineralized ground and offer superior target separation in trashy areas. Concentric coils often provide better pinpointing accuracy and can sometimes offer slightly more depth in non-mineralized soil.
Is it worth upgrading the coil on an Ace 250?
Absolutely. For many users, upgrading the coil is the most significant performance enhancement they can make to their Ace 250, leading to deeper finds and better performance in varied conditions.
How do I know if my coil is bad?
Signs of a bad coil include inconsistent signals, constant false signals, a complete loss of detection, or physical damage to the coil housing or cable.
Conclusion: Finding Your Ultimate Treasure Hunting Companion
The Garrett Ace 250 is a capable detector, but by understanding and selecting the best coil for Ace 250 use, you can elevate your treasure hunting game significantly. Whether you prioritize depth, sensitivity to small targets, or performance in challenging ground, there’s an aftermarket coil out there that will suit your needs. I’ve found that experimenting with different coil sizes and types has not only improved my finds but also made detecting more enjoyable and rewarding. Happy hunting!