Headphones or speaker: the short answer

Use the built-in speaker when the site is quiet and hearing people, vehicles, dogs, or a landowner matters more than isolating the detector audio. Use headphones when wind, surf, traffic, nearby activity, or the need to keep detector sounds private makes open audio impractical.

But make compatibility the first gate. A detector may use a 3.5 mm socket, a sealed proprietary connector, standard Bluetooth, a maker-specific wireless system, or some combination of them. A waterproof detector can also lose its wireless link when the control box goes underwater, while the supplied wireless headphones may not be waterproof at all.

Our five-detector source check found no universal headphone rule. The correct order is:

  1. identify the detector’s exact model;
  2. choose speaker, wired, or wireless for the site;
  3. verify the connector or wireless protocol;
  4. apply the detector and headphone water limits separately.

Five-detector audio compatibility map

The table normalizes current manufacturer documentation checked on August 29, 2026. A blank or undocumented behavior is not treated as support.

Detector Speaker Wired route Wireless route Can speaker and wireless play together? Wet-use boundary
Minelab VANQUISH 440 Built in 3.5 mm None documented Not documented Coil waterproof to 1 m; control box water-resistant with cover, not a submersible audio system
Minelab VANQUISH 540 Built in 3.5 mm Standard Bluetooth; Minelab recommends aptX Low Latency Not documented Same coil/control-box split as the 440
Minelab MANTICORE Built in 3.5 mm; a specific sealed connector is required for submerged use Minelab low-latency wireless Not documented Supplied ML 105 headphones are not the underwater route; Minelab’s waterproof wired headphones form the required seal to 5 m
Nokta The Legend Built in Detector socket; own wired headphones need the optional land-use adapter, while underwater use needs a compatible sealed headset Nokta Bluetooth low-latency headphones Yes, when the documented setting is enabled Wireless works only while the system box remains above water; included Bluetooth headphones are not waterproof
Garrett ACE Apex Built in 3.5 mm; Garrett offers an adapter for 6.35 mm plugs Proprietary Z-Lynk Not documented Coil is submersible, but the control box is weatherproof rather than submersible

This map changes the buying question. “Do I prefer headphones?” is too early. The useful question is “Which audio path does my exact detector support in the place I will use it?”

Wireless does not mean the same thing on every detector

The VANQUISH 540 is the most open wireless route in this sample. Its manual says standard Bluetooth headphones or earbuds can connect, while recommending aptX Low Latency for the best wireless audio performance. The VANQUISH 440 shares the speaker and wired 3.5 mm route but has no Bluetooth audio.

The ACE Apex is different. Garrett’s documentation says its built-in Z-Lynk transmitter works with MS-3 headphones or another headset connected through a Z-Lynk receiver. Garrett also states that ordinary Bluetooth devices and competing proprietary wireless headsets do not connect directly to Apex.

The Legend uses Nokta’s compatible Bluetooth low-latency headphones. Nokta’s current accessory page lists The Legend, Legend 2, Simplex Ultra, Score-family detectors, and AccuPOINT among compatible models. That list is useful precisely because the word “Bluetooth” alone does not establish that every Bluetooth headset will behave as a detector’s supported low-latency route.

MANTICORE adds a further distinction: it has a built-in speaker, a 3.5 mm wired path, and Minelab low-latency wireless. The supplied ML 105 headset can also use its auxiliary cable, but that does not turn it into the sealed underwater headset described in the MANTICORE manual.

A waterproof detector does not make its headphones waterproof

Water limits belong to each component and connection, not to the product name as a whole.

For MANTICORE, Minelab permits submerged audio through its specific waterproof wired headphones and retaining-ring connection. The manual warns that ordinary 3.5 mm plugs do not create that sealed connection. It also identifies the supplied ML 105 wireless headphones as non-waterproof.

For The Legend, Nokta states that the included Bluetooth headphones are not waterproof. Wireless can continue while the coil is submerged and the system box remains above water, but the wireless connection stops when the system box is submerged. Nokta directs underwater users to its compatible waterproof wired headphones.

The VANQUISH 440 and 540 are different again: their coils are rated for submersion to 1 m, while the control box is described as water-resistant with its rain cover attached. The ACE Apex similarly separates a submersible coil from a control box that Garrett describes as weatherproof and not for submersion.

The practical rule is simple: never extend a coil rating to the control box, socket, plug, or headphones. Verify all four parts of the route.

The simultaneous-output exception matters on shared hunts

Some detectorists want private headphone audio while a partner can still hear the speaker. Only one model in this five-detector sample explicitly documents that arrangement.

Nokta added a setting that lets The Legend play through the speaker and paired Bluetooth headphones at the same time. The other retained manuals and product pages were not treated as supporting simultaneous output because they did not state it clearly.

That distinction matters for teaching, paired recovery, and checking a target together. Do not assume a detector will keep its speaker active after a wired plug or wireless headset connects. If shared output is essential, find the exact instruction for the model before buying an adapter or headset.

Choose the output for the hunt, then choose the hardware

Hunt constraint Start with What still needs checking
Quiet private field, short session Speaker Site awareness, courtesy, and whether open audio will disturb anyone
Wind, surf, traffic, or a noisy group hunt Headphones Supported protocol, connection delay guidance, fit, and water exposure
Permission where repeated beeps would disturb people Headphones Cable routing or wireless battery status
Teaching or sharing target tones Speaker, or verified simultaneous output Whether the exact detector mutes its speaker when headphones connect
Shallow water with control box above the surface Model-specific Coil rating, control-box position, headset water rating, and socket protection
Full submersion Sealed wired underwater route Exact maker-approved connector and depth limit

This is not a claim that one output finds deeper targets. The detector produces the target response; the output choice changes how that response reaches the user in a particular environment. This review did not measure audibility, latency, sound pressure, or detection depth.

A four-check headphone buying sequence

1. Name the exact connector

Record the detector model and the physical socket. In this sample, several detectors accept 3.5 mm plugs on land, but Apex needs an adapter for 6.35 mm headphones and MANTICORE needs a particular sealed connector for submerged use.

2. Name the exact wireless system

Write down standard Bluetooth, aptX Low Latency, Nokta-compatible Bluetooth, Garrett Z-Lynk, or the maker’s specified low-latency route. Do not reduce all of them to “wireless.”

3. Separate detector depth from headphone depth

Check the coil, control box, socket closure, cable connector, and headset as separate components. A submersible coil plus dry-land headphones is still a dry-land audio setup.

4. Verify what happens after connection

Confirm speaker mute behavior, volume control, pairing timeout, and whether simultaneous output exists. These details determine whether the setup works for a solo hunt, a teaching session, or a shared permission.

For exact-model buying context, see our Garrett ACE Apex review , Minelab VANQUISH 540 Pro Pack review , and ACE Apex vs Nokta Legend comparison . Those pages cover the detector decision; this map covers the audio route.

Method and limits

This is a source-reconciliation guide, not a hands-on headphone test. We checked five detector identities across three manufacturers and normalized speaker availability, wired connection, wireless protocol, simultaneous-output documentation, and water-use limits. The retained evidence set contains nine first-party manuals, product pages, catalogue entries, and compatibility pages, all retrieved August 29, 2026.

The sample is deliberately limited. It does not represent every detector, firmware version, regional bundle, adapter, or third-party headset. We did not measure latency, isolation, comfort, frequency response, loudness, battery life, or target recovery. Where a behavior was not explicitly documented, the table says “not documented” rather than inferring support.

Manufacturer pages can change. Recheck the exact manual and accessory compatibility list before buying, especially when the control box may be submerged or when a used detector is missing its original cable, adapter, or headphones.

First-party sources