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64 Audio A4s - Quad Hybrid Drivers Custom IEM Earphones

Key Features:

  • Quad hybrid driver custom-fit IEMs with rich enveloping sound
  • Exceeding frequency response, detail, and wide soundstage
  • 1 dynamic low, 1 BA low-mid, 1 BA high-mid, 1 tia high with 4-way crossover
  • Tia Single Bore eliminates unwanted tube resonance
  • Internal modular apex technology eliminates pneumatic pressure
  • LID Linear Impedance Design retains intended frequency response
  • Hypoallergenic hard acrylic shells
  • Fully customizable and custom-built from unique ear impressions
  • 1.2m or 1.6m detachable professional audio cable
  • Manufacturer warranty: 24 months

Product Data:

MSRP KSD SKU Barcode MPN
£1,099.00 P002725 850035627181 A4s
MSRP £1,099.00
KSD SKU P002725
Barcode 850035627181
MPN A4s

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64 Audio A4s

64 Audio is proud to introduce our newest four driver custom in-ear monitor, A4s. This complete redesign of their 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 64 Audio's Tia technology, LID and their 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.

Like all 64 Audio Custom IEMs, the A4s monitors are customizable and are hand built from your uniquely shaped ear impressions. They are inherently noise isolating and are designed to work with a wide range of personal audio devices as well as all hard-wired and wireless monitor systems.

Exceptional rich and enveloping sound.

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Tia®
Tubeless In-Ear Audio (tia) is a patented IEM design methodology that aims to reduce unwanted resonance and distortion for a transparent and lifelike sound signature. The tia system is comprised of three major elements: open balanced armature tia drivers, the tia single-bore design, and tia acoustic chambers. A4s features two major elements of the tia system: the tia driver and the tia single-bore design.

Apex®
Air Pressure Exchange (Apex) is a patented vent that releases air pressure in a sealed ear canal all while retaining standard IEM levels of isolation; enabling musicians and music enthusiasts to listen more comfortably for longer. This venting alleviates listener fatigue and allows for a much more realistic soundstage. The m20 Apex modules are included with the A4s

LID®
Linear Impedance Design (LID) is a patented circuit that corrects the non-linear electrical resistance of the multiple driver-sets comprising this 4 driver IEM. Varying source amplifier output impedance in devices like smartphones, body packs, DAC/amps, and DAPs typically results in varying frequency response across them, depending on the increase in resistance. Restoring proper interaction with the source and preserving the desired sound signature enables a consistent reliable sound.

3D-Fit®
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. All 64 Audio Custom In-Ear Monitors and Custom Earplugs are crafted using this process.

30 Day Fit Guarantee
Because of the many variables involved in creating a custom product, sometimes a fit adjustment is needed. 64 Audio offers a 30 Day Fit Guarantee (on approved impressions) to ensure that your IEMs fit comfortably and retain a proper seal. 64 Audio requires that you notify customer service within 30 days of receiving your IEMs to be covered by the 30 Day Fit Guarantee.

Features

  • Quad hybrid driver custom-fit IEMs with rich enveloping sound
  • Exceeding frequency response, detail, and wide soundstage
  • 1 dynamic low, 1 BA low-mid, 1 BA high-mid, 1 tia high with 4-way crossover
  • Tia Single Bore eliminates unwanted tube resonance
  • Internal modular apex technology eliminates pneumatic pressure
  • LID Linear Impedance Design retains intended frequency response
  • Hypoallergenic hard acrylic shells
  • Fully customizable and custom-built from unique ear impressions
  • 1.2m or 1.6m detachable professional audio cable

Package Includes

  • 64 Audio A4s Custom IEM Earphones
  • 64 Audio personalized aluminium case (with up to 2 lines of text)
  • Dehumidifier
  • Cleaning tool
  • Shirt clip
  • 1.2m or 1.6m detachable professional cable ( 2pin or IPX connectors)
  • m20 apex Module
  • Round sticker

Technical Specifications

  • Transducer Type: 1 Dynamic & 3 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: 107dB/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)
More product information on the 64 Audio website

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