AMPLIFIER
EAR3H-MK2
HELMET AUDIO
Twelve decibels of clean power, in a module the size of a matchbox.
Your helmet speakers can only perform as well as the signal driving them. The IASUS EAR3H MK2 is a compact digital helmet audio amplifier designed to increase audio output from compatible motorcycle communication systems and audio sources, giving riders more volume when their existing setup falls short.
- +12dB of clean digital gain, less than 0.3% distortion
- Magnetic quick-release mount, on and off in seconds
- IP66 sealed, 7 hour battery, USB-C fast charge
DIGITAL AMPLIFICATION · COMPACT DESIGN · FOR HELMET AUDIO
SMALL MODULE. SERIOUS OUTPUT.
Small, Black, and Built to Give Every Source More.
The EAR3H MK2 is designed for riders who want more from their helmet audio without replacing their entire communication system.
Connect a compatible audio source to the amplifier, connect your helmet speakers, and adjust the amplification level to suit your setup. Its compact design fits neatly into your riding gear, while the magnetic mounting system makes it easy to remove when needed.
No complicated interface. No unnecessary bulk. Just more control over the audio going into your helmet.
1. MORE AUDIO OUTPUT
Increase the output of compatible audio systems with up to +12 dB of digital amplification.
2. CONTROL WHEN YOU NEED IT
Choose from three amplification levels to adjust the output for your listening environment.
3. COMPACT BY DESIGN
A small, lightweight module designed to integrate into your existing helmet audio setup.
SEE IT UP CLOSE
The module, front to back.
Every connection and control has a purpose. The EAR3H MK2 brings digital amplification, adjustable output, and a compact mounting system together in one dedicated helmet audio accessory.
AUDIO INPUT
Connect a compatible audio source or communication system through the amplifier’s audio input.
DIGITAL AMPLIFICATION
Increase the audio signal with up to +12 dB of amplification.
MAGNETIC QUICK-RELEASE MOUNT
Attach the amplifier to its compatible mount and remove it when needed.
Mounted
Magnetic base, on and off in seconds.
THE PROBLEM WITH STANDARD AUDIO
Most Communication Systems Run Out of Volume.
A communication system can deliver music, GPS directions, and calls, but its available audio output may not be enough for every rider or setup.
Helmet speaker performance depends on several factors, including speaker sensitivity, positioning relative to the ears, the output capability of the connected device, and the noise inside the helmet.
The EAR3H MK2 adds dedicated digital amplification between a compatible audio source and your helmet speakers. It gives your system additional output when you need more volume, without requiring you to replace your existing communication system.
DIGITAL AMPLIFICATION
Clean gain, not just more gain.
The EAR3H MK2 is designed to increase audio output while giving riders control over how much amplification they apply.
Its three-level control lets you select the amplification level that best suits your audio source, speakers, and listening environment. The goal is straightforward: more usable audio output from a compatible helmet audio system.
For the best results, use appropriately matched equipment and position your helmet speakers close to your ears. Amplification cannot compensate for every compatibility issue, poorly positioned speakers, or an audio source that is already producing a distorted signal.
01
+12 dB DIGITAL AMPLIFICATION
Additional amplification for compatible helmet audio setups.
02
12 levels of VOLUME control
Selectable amplification to suit your equipment and listening needs.
03
Magnetic quick-release mount
A convenient mounting system designed for everyday use.
EAR3H-MK2 Helmet Audio Amplifier
Motorcycle communication system amplifier
$99
BUILT FOR THE RIDE
Loud, clear, and intelligible at speed.
The EAR3H MK2 is built for riders who want greater control over the audio in their helmets. Whether you’re listening to music, following GPS directions, or using a compatible communication system, additional amplification can help make audio easier to hear when your existing setup lacks output.
Zero latency, real-time audio
The amp sits inline on a wired 3.5mm path, so there’s no digital lag between the source and your ear. Nav prompts and rider-to-rider comms land the instant they’re sent.
Boosts without draining your comm battery
It runs on its own 90mAh cell, so the +12dB doesn’t pull extra power from your Sena/Cardo.
Wired, so it never drops
No pairing, no reconnects, no dead spots at speed. Hardwired into the audio path means the connection can’t cut out like a wireless link.
SIMPLE BY DESIGN
Snap it on. Ride. Snap it off.
The EAR3H MK2 uses a magnetic quick-release mounting system designed to make attachment and removal straightforward.
Once the compatible mount is installed, the amplifier can be attached when you’re ready to ride and removed when you need to store or charge it.
Its compact form keeps the setup simple, with the amplifier working alongside your existing compatible audio equipment.
01
CONNECT
Connect your compatible audio source and helmet speakers using the appropriate connections.
02
MOUNT
Secure the compatible mounting hardware in the recommended location.
03
AMPLIFY
Attach the EAR3H MK2, select your preferred amplification level, and test the audio before riding.
READY WHEN YOU ARE
Several Hours. Sealed Away and Ready to Charge.
The EAR3H MK2 features a rechargeable internal battery designed to power its amplification without requiring a continuous external power connection.
USB-C charging makes it convenient to recharge between rides, while the compact module keeps the system easy to carry and store.
- Up to 7 hours playtime
- Rechargeable internal battery
- USB-C fast charge, 90 min full
- IP66 water and dust resistance
- LED charge indicator
- 13 g, 2.5cm x 3.0cm x 0.8cm
- 90mAh rechargeable battery
THE BRAND
We only do one thing: audio inside the helmet.
IASUS has focused on helmet audio since 2001, developing products for riders who want their music and communication equipment to work as part of their riding gear.
The EAR3H MK2 follows that same principle. It is not a general-purpose home amplifier or another Bluetooth communication system. It is a dedicated audio accessory designed to work with compatible helmet audio equipment.
TECHNICAL SPECIFICATIONS
The details.
Technical specifications should be presented in a clean, crawlable HTML table rather than embedded only in an image.
Here is the structure I recommend. The figures below should be checked against the current approved EAR3H MK2 specifications before publication.
| Amplification | Up to +12dB (<0.3% THD) |
| Output power | 70mW/32Ω, 105mW/16Ω |
| Output load | 16Ω to 46Ω |
| THD+N | 0.1% |
| Signal-to-noise | 100dB @32Ω, 20mW |
| Frequency response | 20Hz to 20kHz |
| Continuous playtime | Up to 7 hours |
| Battery | 90mAh rechargeable |
| Charging | USB-C, 90 min full |
| Weight | 13 g |
| Dimensions | 2.5cm x 3.0cm x 0.8cm |
| Waterproof | IP66 |
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COMPATIBLE WITH IASUS PRODUCTS
Build the full comms stack.
SPEAKERS
COMM SYSTEMS
FREQUENTLY ASKED QUESTIONS
Everything riders ask.
What does the EAR3H-MK2 do?
The EAR3H-MK2 is a compact helmet audio amplifier that boosts your in-helmet sound by up to +12dB. It enhances music, GPS instructions, and communication audio with crystal-clear fidelity and minimal distortion, even at high volume.
Is the amplifier compatible with my helmet communication system?
Yes. The EAR3H-MK2 works with most helmet comms featuring a 3.5mm earbud port, including Sena Technologies and Cardo Systems. It also works seamlessly with IASUS XSound 2.1R, XSound 3 and XSound 4 speakers.
Can I use the EAR3H-MK2 with my smartphone or music player?
Absolutely. The amplifier connects via a standard 3.5mm audio pin plug, giving you louder, clearer sound from any smartphone, GPS, or music device.
How long does the battery last?
The rechargeable 90mAh battery provides up to 7 hours of continuous audio. Perfect for long rides, commuting, or all-day adventures.
How do I charge the EAR3H-MK2?
Charging is fast and convenient via USB-C to 3.5mm jack cable. A full recharge takes approximately 90 minutes. The LED indicator shows red while charging and turns off when fully charged.
Is the amplifier durable and weatherproof?
Yes. The EAR3H-MK2 is IP66-rated for water resistance, protecting against rain, dust, and harsh riding conditions. It’s built for real-world riding environments.
How do I install the EAR3H-MK2 in my helmet?
The amplifier features a magnetic quick-release mounting system with the built in magnetic mount or with strong 3M adhesive velcro stickers (sold separately). Simply attach it to your preferred helmet location for secure placement, or remove it instantly when needed.
Will it cause distortion at high volumes?
No. The digital amplification system maintains less than 0.3% harmonic distortion even at maximum output, ensuring clear, full-bodied audio.
Can I adjust the volume to suit different environments?
Yes. The EAR3H-MK2 offers three levels of volume amplification (low, medium, high) to adapt to quiet streets, city traffic, or highway conditions.
Is it compatible with other IASUS helmet products?
Definitely. The EAR3H-MK2 is fully compatible with the IASUS throat mics, Bluetooth comms and the XSound helmet speakers.
Can I use it with other headphones or earbuds?
Yes. Any device with a 3.5mm connection can be used with the amplifier to increase volume and audio clarity.
Is it suitable for long rides?
Yes. Its ultra-compact, lightweight design and up to 7 hours of battery life make it ideal for all-day riding. The amplifier is also designed for quick swaps and is small enough to carry with you anywhere.
CUSTOMER REVIEWS
What riders say.
★★★★★
GOOD FOR RIDERS
Just got the EAR3 for my daily rides. The sound quality is clear, and the volume control is intuitive. Battery life is impressive; it lasted through my weekend road trip.
ALEX F.
★★★★★
SO FAR SO GOOD
Tested the EAR3 on my helmet, and it is doing what I expected. Audio is crisp and loud, no distortion. Best audio solution I have used so far to get more volume.
BRIAN W.
★★★★★
PRETTY GREAT!
Sound quality is super good, and it is easy to work with gloves. A solid step up in helmet volume without losing clarity.
SIENNA S.