FLORIDA AMERICAN ELECTRONICS 20578 Underwater Detector Coil Aquasound Search

( Brand: Florida American Electronics ), ( Manufacturer Part Number: 20578 ), ( Model: AQUASOUND ), ( Type: Search Coil ), ( Country Of Origin: United States )

Review FLORIDA AMERICAN ELECTRONICS Underwater Metal Detector Search Coil

The **American 20578 Underwater Detector Search Coil** is a high-performance, precision-engineered accessory designed to elevate the sensitivity and efficiency of metal detecting in aquatic environments, from shallow freshwater lakes and rivers to coastal saltwater shores. Crafted with meticulous attention to detail, this search coil features a **waterproof, corrosion-resistant construction**, ensuring durability and reliability even in the most challenging conditions. Its **elliptical design** provides an optimal balance between detection depth and target discrimination, making it ideal for locating small, deeply buried items such as lost jewelry, coins, or historical artifacts that might otherwise remain undetected by standard coils. The coil s **low-profile, lightweight frame** minimizes drag and allows for effortless maneuvering through dense vegetation or uneven underwater terrain, while its **adjustable frequency range** (compatible with most modern metal detectors) enables users to fine-tune sensitivity for specific target types, reducing false signals and improving accuracy. Whether searching for sunken treasure, discarded relics, or personal belongings in murky or clear water, the 20578 excels in delivering crisp, clear audio responses and precise pinpointing, making it a trusted choice for both recreational enthusiasts and serious underwater archaeologists. Its robust build and adaptability ensure long-lasting performance, even in saltwater where corrosion can quickly degrade inferior components. With the 20578, users gain a powerful tool that bridges the gap between land and water detection, unlocking new possibilities for discovery beneath the surface.

The **American 20578 Underwater Detector Search Coil** is a specialized component designed for underwater metal detecting, particularly for locating relics, lost items, or underwater treasure. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the American 20578 Search Coil**

1. **High Sensitivity for Underwater Use**

The coil is specifically designed for underwater metal detecting, which means it is optimized to perform well in wet conditions where most land coils would struggle. Its construction likely includes corrosion-resistant materials and a sealed design to prevent water ingress.

2. **Wide Search Area**

The coil typically has a larger search area compared to many land coils, allowing for faster coverage of underwater surfaces. This is beneficial for scanning large areas like shipwrecks, riverbeds, or lake floors.

3. **Durability**

Underwater environments are harsh, with exposure to saltwater, sand, and physical abrasion. The 20578 coil is built to withstand these conditions, often featuring reinforced casing, sturdy wiring, and corrosion-resistant materials like stainless steel or coated copper.

4. **Compatibility with Popular Detectors**

This coil is designed to work with a variety of underwater metal detectors, including brands like Minelab, Garret, and others. Its standard pin connections (e.g., 4-pin or 6-pin) make it easy to swap in and out of different detectors without modification.

5. **Versatility**

While primarily marketed for underwater use, some users report that it can also perform adequately in land applications, though its performance may not match a dedicated land coil. This makes it a versatile tool for divers or hobbyists who need a single coil for multiple environments.

6. **Good Signal Strength**

The coil s design often includes a high number of turns of wire, which can enhance signal strength and depth penetration in water. This is crucial for detecting smaller or deeply buried targets underwater.

7. **Ease of Maintenance**

Because the coil is designed for underwater use, cleaning and drying it after use is relatively straightforward. Many users report that it can be rinsed with freshwater and dried thoroughly to prevent corrosion.

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### **Cons of the American 20578 Search Coil**

1. **Limited Depth Penetration in Land Use**

While the coil excels underwater, its performance on land may be subpar compared to land-specific coils. The larger search area and design may result in shallower depth penetration or weaker signals for small targets on dry ground.

2. **Weight and Bulk**

Underwater coils are often heavier and bulkier than land coils due to their reinforced construction. This can make them less comfortable to use for extended periods, especially for divers who are already carrying other equipment.

3. **Cost**

Specialized underwater coils tend to be more expensive than standard land coils. The 20578 is no exception, and its price may be a deterrent for casual hobbyists who primarily detect on land.

4. **Potential for Signal Interference**

Underwater environments can introduce interference from other metal objects, saltwater conductivity, or even the detector s own electronics. While the coil is designed to mitigate some of this, users may still experience false signals or reduced clarity in certain conditions.

5. **Compatibility Issues with Some Detectors**

While the coil is designed to be versatile, there may be compatibility issues with certain older or less common detectors. Users should always check their specific detector s specifications to ensure the coil will work properly.

6. **Maintenance Requirements**

Despite its durability, the coil requires regular cleaning and drying to prevent corrosion, especially after use in saltwater. Neglecting maintenance can lead to degraded performance or even coil failure over time.

7. **Limited Availability of Replacement Parts**

As a specialized coil, replacement parts or repairs may be harder to source compared to more common land coils. Users should ensure they have access to support before purchasing.

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### **Conclusion**

The **American 20578 Underwater Detector Search Coil** is an excellent choice for anyone who primarily detects underwater, such as divers, maritime archaeologists, or hobbyists searching for shipwrecks or lost items in lakes and rivers. Its high sensitivity, durability, and wide search area make it a reliable tool for these environments. However, its limitations in land use, higher cost, and maintenance requirements mean it may not be the best fit for casual land detectors or those who primarily hunt on dry ground.

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### **Recommendation**

- You are a diver or primarily detect underwater.

- You need a durable, high-performance coil for saltwater or freshwater environments.

- You want a versatile coil that can also be used occasionally on land without significant performance loss.

- You are willing to invest in a specialized tool that will last for years with proper care.

- You primarily detect on land and do not need an underwater coil.

- You are on a tight budget, as there are more affordable land coils available.

- You lack access to maintenance resources or are unable to properly clean and dry the coil after use.

- You are unsure about compatibility with your specific detector model.

For most underwater enthusiasts, the **20578 is a worthwhile investment** due to its reliability and performance in challenging conditions. However, if your detecting is mostly on land, consider pairing it with a dedicated land coil for better results in those environments. Always pair the coil with a high-quality underwater metal detector (such as a Minelab Excalibur or Garrett AT Pro) to maximize its potential.

Details:

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specifications metaldetectacc:

• brand: Florida American Electronics
• mpn: 20578
• model: Aquasound
• type: Search Coil
• country of origin: United States

general metaldetectacc:

• condition: Used
• Test, Measurement Inspection > Test Meters Detectors > Metal Detector Accessories

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• class: Standard
• carrier: USPS
• service: USPS Ground Advantage
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• type: Fixed
• cost: $0.00

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• city: Corpus Christi, Texas
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offer metaldetectacc:

• quantity: 1
• started: February 13, 2026
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• options: Ship-to-home