Gravity Fishing · Tuna Magnets

TUNA MAGNET

Turn it on, bring them in!

Advanced underwater acoustic technology for serious offshore anglers. In-hull mount for maximum hull-coupled transmission.

€599,00

Batch #2 preorder · 3 of 50 left

Batch #1 sold out. Batch #2 is open now — estimated dispatch in 5–7 days.

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Tuna Magnet
◆ Marine-Grade ASA Polymer
◆ IP68 Saltwater Rated
◆ In-Hull Mount Ready
◆ 12V Marine Power
Tuna Magnet

Your Tuna Magnet

Tuna Magnet

€599,00

Tax included.

Advanced underwater acoustic technology for serious offshore anglers. TUNA MAGNET reproduces underwater acoustic patterns inspired by baitfish schools — turning your hull into the emitter for chunk fishing and trolling.

  • Marine-grade ASA polymer housing — IP68 saltwater rated
  • 316L stainless steel mounting ring
  • Heavy-duty tinned copper cables
  • 12V marine power — connects to onboard batteries
  • In-hull mount recommended for maximum acoustic transfer
  • Drop-in water deployment optional

Turn it on, bring them in.

  • IP68 saltwater rated ASA housing
  • 12V marine power — connects to onboard batteries
  • In-hull mount ready
  • Field-tested offshore acoustic technology
Gravity Tuna Magnet

Batch #2 preorder · 3 of 50 left

Batch #1 sold out. Batch #2 is open now — estimated dispatch in 5–7 days.

Hand-assembled in limited quantities.

Each unit is individually tested before shipping.

Marine-grade build Secure checkout Offshore support

Built For Offshore

Serious Technology. Serious Anglers.

Attract more, catch more

Project underwater acoustic presence that complements chunking and trolling.

Advanced acoustic pulse technology

Modulated low-frequency sequencing inspired by baitfish schools.

Designed for serious anglers

Engineered for offshore environments where every advantage counts.

Built to perform. Built to last.

Marine-grade ASA housing, IP68 rating, 316L stainless hardware.

Real results in open water

Field-tested offshore with increased pelagic activity reported.

Ready for your next offshore trip?

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Research Foundation

Built On Marine Bioacoustics

Published research has demonstrated that many marine species can detect and respond to low-frequency acoustic stimuli. Tuna Magnet applies these principles in a practical offshore fishing system.

Marine species can detect and respond to low-frequency acoustic stimuli in open-water environments.

Tuna Magnet generates low-frequency vibrations shaped by decades of marine bioacoustics research — applied signal design for serious offshore anglers, not guesswork.

Low frequency acoustic waveform visualization
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Low frequency acoustic waveform visualization

Modulated low-frequency pulse sequencing

Published research

Marine bioacoustics research demonstrates that marine species respond to specific low-frequency acoustic signals — particularly in open-water environments where visual cues fade.

Applied signal design

Tuna Magnet generates low-frequency acoustic vibrations inspired by that research — modulated pulse sequences engineered for hull-coupled transmission offshore.

Proven concept, modern build

The science established the principle. Tuna Magnet delivers it with marine-grade hardware — carrying forward the legacy Tuna Teaser concept for today's serious anglers.

Inspired by published marine bioacoustics research and the legacy Tuna Teaser concept — refined for modern hull-coupled deployment.

Research-backed acoustic technology

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How It Works

See The System In Action

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Hull acoustic coupling
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Hull acoustic coupling

AI image prompt

Technical cutaway illustration: sportfishing boat hull cross-section below the waterline showing a white dome Tuna Magnet acoustic transducer mounted in-hull against the inside fiberglass surface, thin white mineral oil acoustic coupling layer between unit and hull, stylized teal concentric sound waves transmitting through the hull into deep navy open ocean. Premium marine engineering infographic, clean modern diagram style, deep navy and teal accent palette, Gravity Fishing visual system, no text labels, no logos, no watermarks

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Core concept

Hull acoustic coupling

Sound transmits through the hull into open water — your boat becomes the underwater emitter.

Drifting & chunking
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Drifting & chunking

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Cinematic offshore documentary photograph: sportfisher drifting in open Atlantic blue water during chunk fishing for tuna, anglers on deck tossing baits, subtle stylized teal acoustic glow beneath the hull suggesting underwater sound transmission, golden hour warm light. Gravity Fishing premium offshore marine brand aesthetic, rich teal-navy color grade, photorealistic 8K detail, no text, no logos, no watermarks

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Chunk fishing

Drifting & chunking

Many anglers report the strongest results while chunking for tuna in open water.

Built for offshore
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Built for offshore

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Action documentary photograph: offshore sportfisher at dawn in deep Atlantic blue water, Gravity Fishing Tuna Magnet white dome acoustic transducer visible on deck near the transom, crew actively chunking for tuna, authentic offshore fishing moment with spray and golden light. Gravity Fishing premium offshore marine brand aesthetic, rich teal-navy color grade, cinematic documentary style, photorealistic 8K detail, no text, no logos, no watermarks

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On the water

Built for offshore

Field-tested acoustic technology designed for chunk fishing and trolling in demanding pelagic conditions.

See it on the water — order yours today

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Two Ways To Deploy

Hull Mounted Or Drop In The Water

Hull mounting delivers the strongest acoustic coupling. Drop-in deployment is available when you need a faster setup on the water.

Recommended

Hull Mounted

Mount inside the hull below the waterline. Vibrations transfer through the fiberglass into open water — your boat becomes the acoustic emitter.

Hull Mounted
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Hull Mounted

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Documentary installation photograph inside a sportfishing boat hull bilge below the waterline: offshore angler mounting the white dome Tuna Magnet acoustic transducer against the interior fiberglass hull, continuous marine sealant bead visible around the 316L stainless mounting ring, warm LED work light, compact tools nearby. Gravity Fishing premium offshore marine brand aesthetic, realistic documentary style, shallow depth of field, photorealistic 8K detail, no text, no logos, no watermarks

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Optional

Drop In The Water

Deploy directly in the water beside the hull when in-hull mounting is not practical. Effective offshore, with hull mounting delivering superior acoustic transfer.

Drop In The Water
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Drop In The Water

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Documentary offshore photograph: sportfishing boat drifting in deep Atlantic blue water, white dome Tuna Magnet acoustic transducer suspended on black marine cable beside the hull for drop-in deployment, gentle swell and wake, crew visible on deck. Gravity Fishing premium offshore marine brand aesthetic, rich teal-navy color grade, cinematic documentary style, photorealistic 8K detail, no text, no logos, no watermarks

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In-hull mount ready · 5–7 day dispatch

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Engineering

Built For Offshore Conditions

Every component selected for saltwater exposure and continuous offshore operation.

Marine Grade Housing
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Marine Grade Housing

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Extreme macro product photograph of the Tuna Magnet ASA polymer housing surface: UV-resistant matte white finish with subtle texture, fine saltwater droplets beading on the dome, edge of 316L stainless mounting ring visible, dark navy soft background blur. Gravity Fishing premium marine product macro style, shallow depth of field, photorealistic 8K detail, no text, no logos, no watermarks

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Marine-Grade Housing

ASA polymer for UV, saltwater, and corrosion resistance.

Heavy Duty Copper Cables
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Heavy Duty Copper Cables

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Macro product photograph of heavy-duty multi-conductor copper marine cable for the Tuna Magnet: cutaway or stripped section showing copper strands preventing oxidation, cable coiled on wet teak deck with deep navy ocean bokeh, technical product detail. Gravity Fishing premium marine product macro style, photorealistic 8K detail, no text, no logos, no watermarks

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Heavy-Duty Copper Cables

Heavy-duty multi-conductor copper wire prevents oxidation.

Saltwater Resistant
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Saltwater Resistant

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Macro product photograph: white dome Tuna Magnet ASA housing submerged in a controlled saltwater splash test, water streaming off the matte dome and 316L stainless ring, demonstrating marine durability, dark navy background. Gravity Fishing premium marine product style, photorealistic 8K detail, no text, no logos, no watermarks

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Saltwater Resistant

IP68 water resistance for demanding offshore environments.

Precision Acoustic Output
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Precision Acoustic Output

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Premium technical visualization: abstract low-frequency acoustic waveform and pulse sequence rendered as elegant teal luminous curves against deep navy background, suggesting baitfish-school-inspired modulation, clean modern data-aesthetic. Gravity Fishing visual system, no readable text, no logos, no watermarks

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Precision Acoustic Output

Modulated low-frequency sequencing for pelagic fish.

Underwater Acoustic Tech
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Underwater Acoustic Tech

AI image prompt

Technical cutaway illustration: sportfishing boat hull cross-section below the waterline showing a white dome Tuna Magnet acoustic transducer mounted in-hull against the inside fiberglass surface, thin white mineral oil acoustic coupling layer between unit and hull, stylized teal concentric sound waves transmitting through the hull into deep navy open ocean. Premium marine engineering infographic, clean modern diagram style, deep navy and teal accent palette, Gravity Fishing visual system, no text labels, no logos, no watermarks

Save as assets/hull-speaker-diagram.jpg and push the theme, or upload in the theme editor. Full catalog: assets/image-prompts.json

Underwater Acoustic Tech

Hull-coupled transmission for open-water environments.

12V Marine Power
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12V Marine Power

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Macro documentary photograph on a sportfishing boat: Tuna Magnet black marine power cable connected to a 12V onboard battery terminal with proper marine crimp connector, battery switch and tidy wire routing visible, warm cabin light. Gravity Fishing installation detail style, photorealistic 8K detail, no text, no logos, no watermarks

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12V Marine Power

Connects directly to onboard batteries.

Marine-grade build · individually tested

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Q & A

Offshore Questions

Can I use TUNA MAGNET while trolling or chunking?

Yes. TUNA MAGNET integrates into both trolling and chunk fishing setups.

What power does it require?

TUNA MAGNET runs on standard 12V marine power and connects directly to onboard batteries.

Is it saltwater rated?

Yes. The ASA polymer housing is IP68 rated for demanding offshore saltwater environments.

What's included?

Each system includes the Tuna Magnet unit and marine-grade power cabling. In-hull mount ready.

Can I use it without hull mounting?

Yes. You can drop the unit in the water beside the hull. Hull mounting is recommended for maximum acoustic transfer through the fiberglass.

Get Started

Ready to Turn Your Hull Into a Magnet?

Advanced underwater acoustic technology for chunk fishing and trolling.

€599,00

Marine-grade build · Secure checkout · Offshore engineered