Metal Detector Settings Explained
Master Your Detector's Controls
Learn how to set up your metal detector for maximum performance. We explain discrimination, sensitivity, ground balance, and notch filtering.
- 1Sensitivity Settings
- 2Discrimination Explained
- 3Ground Balance
- 4Audio Settings
Sensitivity controls your detector's amplification power.
Higher Sensitivity: - Finds deeper and smaller targets - More chatter and false signals - Best in clean, quiet ground
Lower Sensitivity: - Quieter operation - Less depth - Better in trashy or mineralized ground
Rule of Thumb: Start high and reduce until stable. Maximum isn't always best.
Discrimination helps you ignore trash and find treasure.
How It Works: Different metals have different electrical signatures. Discrimination filters out unwanted signatures.
Notch Discrimination: Accept or reject specific ID ranges. Example: Notch out foil (5-15) while keeping nickels (16-20).
Iron Bias/Volume: Controls how aggressively iron is rejected. Higher = more iron rejected but risk losing iron-masked gold.
Warning: Over-discrimination misses good targets! Many beginners discriminate too much and miss gold jewelry, nickels, and relics.
Ground balance compensates for soil mineralization.
Preset Ground Balance: - Automatic, no user adjustment - Works in moderate conditions - Found on entry-level detectors
Manual Ground Balance: - User sets the value - Maximum control - Requires practice to master
Automatic/Tracking: - Continuously adjusts - Excellent for changing conditions - May track out targets if too aggressive
Audio is how your detector communicates targets.
Tone Count: - Single tone: Simple, all targets sound same - Multi-tone: Different tones for different metals - Full tones: Continuous tone variation
Threshold: - Faint background hum - Deeper targets break threshold - Essential for gold prospecting
Volume: Use headphones! Quiet signals become clear, and you won't annoy others.
Iron Audio: Some detectors (Garrett) give audio feedback on rejected iron. Helps identify iron-masked targets.
Detectors We'd Recommend After Reading This
Our current picks for the kind of hunting this guide covers, ranked on rating and review volume.
Garrett ACE 300
Garrett's ACE 300 bridges the gap between toy detectors and serious machines with 0-99 Digital Target ID for accurate identification. Five preset search modes eliminate guesswork for new hunters, while the 7x10" DD coil provides solid depth. Made in USA with Garrett's proven reliability at an accessible price point.
Price may vary
Garrett ACE 400
The ACE 400 hits the sweet spot in Garrett's lineup with a 0-99 Digital Target ID scale and adjustable frequency that helps reduce interference. Iron Audio lets you hear masked iron targets, preventing false digs. The included 8.5x11" DD coil covers ground efficiently while the USA-made build quality ensures years of reliable use.
Price may vary
Nokta Simplex Ultra
The Simplex Ultra upgrades the beloved Simplex+ with simultaneous multi-frequency and more single-frequency options. Still maintains the original's simplicity and IP68 waterproofing while adding serious capability. The rechargeable battery and included wireless headphones make it hunt-ready out of the box.
Price may vary
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