AMP Accessory
Passive wireless earbuds for double hearing protection. Near Field Magnetic Induction technology receives audio from NFMI-enabled AMP earcups, no batteries, no charging, no Bluetooth. Insert the foam tips, put on the headset, press the mode-switch button, and the earplugs seamlessly integrate for clear comms + 3DHT with NRR boosted from 22 dB to 34 dB.
Protection Levels
| Configuration |
NRR |
SNR |
| With AMP Headset |
34 dB |
41 dB |
| Earplugs Alone |
30 dB |
38 dB |
How NFMI Works
NFMI transmitters inside the AMP earcups create a short-range magnetic field that couples through skin and bone to passive receivers in the earplugs. All audio, radio comms, 3D Hear-Through, and 3D Hear-Through, is reproduced inside the ear canal. The earplugs contain no active electronics; the magnetic field carries the signal.
To activate: press the NFMI mode-switch button on the left earcup. A double-tone confirms the switch. Press again to return audio to the earcup speakers.
Key Specs
-
Weight: 7 grams per pair (with foam tips)
-
Battery: None, completely passive
-
Foam Tips: 3 sizes included, Standard, Slim, Large (Comply™ viscoelastic memory foam that conforms to the ear canal)
Kit Contents
- NFMI Earplugs (pair)
- Comply Foam Tips, 3 sizes
- NFMI Earplug Case
NFMI-Enabled Headset Required. These earplugs only work with NFMI-version AMP headsets. Standard (non-NFMI) AMP headsets do not have the NFMI transmitter. If you press the mode button without earplugs inserted, you will hear no audio.
Combined Noise Protection Ratings
| Configuration |
NRR |
SNR |
H / M / L |
| With AMP Headset |
34 dB |
41 dB |
41 / 39 / 34 |
| With RAC Headset |
32 dB |
39 dB |
41 / 36 / 32 |
| Earplugs Alone |
30 dB |
38 dB |
38 / 35 / 31 |
NFMI earplugs require an NFMI-enabled headset (AMP or RAC). The Mode Switch button on the headset toggles between NFMI earplug and standard headset-only operation.
How NFMI Works
Near Field Magnetic Induction (NFMI) uses a short-range magnetic field to couple audio from the headset ear cups to the in-ear receiver, no wires, no batteries, no Bluetooth pairing. When the earplug is seated in the ear canal and the AMP ear cup closes over it, the magnetic coupling is enabled with the left-earcup NFMI button (double tone) per the AMP operator’s manual, not fully automatic. The result: double hearing protection (ear cup + in-ear seal) with full 3D Hear-Through and comms audio passed through to the earplug.
Battery impact: NFMI engagement reduces AMP battery life from ~120 hours to ~80 hours (lithium, 21°C). In the event of battery loss, 3DHT powers down but the earplug continues to provide passive hearing protection and standard comms audio.
Warranty
Gentex Ops-Core limited warranty, 1 year from delivery for defects in material and workmanship under normal use. This is a manufacturer warranty (not a DISCO32 factory warranty). DISCO32 will assist with RMA coordination and proof of purchase; claim resolution is determined by Gentex.
Full store policy.
Warranty
Gentex Ops-Core limited warranty — 1 year from delivery for defects in material and workmanship under normal use (general product warranty for headsets, accessories, components, and non-ballistic products).
This is a manufacturer warranty (not a DISCO32 factory warranty). DISCO32 will assist with RMA coordination and proof of purchase; claim resolution is determined by Gentex.
Full terms: https://www.gentexcorp.com/product-warranty-information/
Full store policy.
