A4s

radar chart a4s

64 Audio is proud to introduce our newest four driver custom in-ear monitor, A4s. This complete redesign of our four driver platform is elevated by the Dynamic low frequency driver, making this 64 Audio’s second hybrid custom IEM. Along with that major update, inside A4s is our Tia technology, LID and our patented Apex and 3Dfit tech. While this is targeted at musicians looking for a rich enveloping monitoring experience, the frequency response, detail, and soundstage capabilities of A4s exceed other audiophile products at almost any price point.

TECHNOLOGY

Exclusive technologies that challenge traditional in-ear monitor designs to give you the absolute best listening experience

A4s features the following unique technology:

tia

Our industry-first, tubeless technology eliminates sound-altering dampers and tubes. This reduced resonance reveals a new level of resolution and transparency.

apex

Only from 64 Audio, apex alleviates listener fatigue by releasing air pressure sealed in the ear canal. This venting enables musicians and music enthusiasts to listen more comfortably for longer.

Apex, or Air Pressure Exchange, is a pneumatically interactive vent that releases air pressure from a sealed ear canal. Apex comes in two variations, m15 (-15dB) and m20 (-20dB).

Alleviate Listener Fatigue
When you seal a miniature speaker in an ear canal, the air inside becomes trapped. Apex relieves this air pressure, allowing the eardrum to move naturally, so you can comfortably listen longer.

Extend The Soundstage
Freely moving air extends the soundstage and provides a more natural listening experience. It also preserves bass frequencies and helps the listener distinguish individual instruments.

Hear Your Audience
Custom in-ear monitors provide amazing isolation and help you hear your mix more clearly and at lower volumes than a wedge monitor or earbuds. Apex lowers decibel levels while preserving the clarity of the sounds around you, so artists on stage can connect with their audience while protecting their hearing.

3D fit

Preserves the detail of your ear impressions using a new process of digital rendering and 3D printing for the most comfortable custom in-ear monitors available.

Our 3D-Fit technology preserves the detail of your ear impressions using a new process of digital rendering and 3D printing. Compared to conventional wax-dip molding, this process reduces distortion in the impression for the most precise and comfortable custom in-ear monitors available.

Digitally Scanned
A great fitting pair of custom in-ear monitors begins with a quality set of ear impressions. Each impression is digitally scanned and refined by our technicians to preserve each detail for a perfect fit.

3D Printed
Final shells are printed using our state-of-the-art 3D printer using a hypoallergenic, hard acrylic. The colors and materials we use have been specifically chosen for longevity and durability. These materials also allow the digital renderings to maintain their detail for optimal comfort.

Hand Assembled
Once shells are printed, our production team assembles the remaining components by hand. All 64 Audio Custom In-Ear Monitors are customizable and hand-built from your unique ear impressions. Wearing a custom-fit earphone helps isolate external noise and offers a more comfortable listening experience compared to most universal earphones.

LID

Enables a consistent, reliable sound regardless of audio source.

LID, or Linear Impedance Design, enables a consistent, reliable sound regardless of what source. This proprietary circuit corrects the non-linear impedances of the drivers, restoring proper interaction with the source and preserving the desired sound signature.

Whether you're a musician plugging into a variety of gear at different gigs or studios, or an audiophile listening from low-impedance sources, LID ensures your IEMs are delivering the desired sound signature consistently.

And like all our IEMs, this model can be used with a wide range of personal audio devices as well as all hard-wired and wireless monitor systems.

SPECIFICATIONS

Transducer Type	Dynamic & Balanced Armature
Transducer Configuration	1 dynamic low, 1 BA low-mid, 1 BA high-mid, 1 tia high
Bore Configuration	Single
Frequency Response	10Hz – 20kHz
Sensitivity	107 dB/mW (94mV) @ 1kHz
Impedance	11Ω @ 1kHz
Crossover	Integrated 4-way passive crossover
Isolation	20dB w/ m20 module, -15dB w/ m15 module. Ships with M20 Module standard

IN THE BOX

A4s Custom In-Ear Monitors

64 Audio Personalized Protective Case

Dehumidifier

Cleaning Tool

Shirt Clip

48" or 64" Detachable Professional Cable

m20 apex Modules

Round Sticker

Product Manual

64 Audio A4s Custom In-Ear Monitor