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Introducing 64 Audio’s newest hybrid four driver custom in-ear monitor, A4s. This 4 Driver IEM has been re-engineered from the ground up and is elevated by incorporating a Dynamic low frequency driver, making this 64 Audio’s second hybrid custom IEM. Along with this major update, A4s features Tubeless In-Ear Audio (Tia) technology at a new lower price point for crystal clear highs, along with LID and patented Apex tech for a wide, detailed and full sound experience for all musicians. This is an IEM for musicians looking for a rich enveloping monitoring experience, with an frequency response, excellent detail, and an immersive soundstage. This IEM is great for those needing a little more power in the low end, Bassists, Drummers and Guitarists using drop tunings or extended range instruments – you need to check this guy out!


Main Features:

  • Quad driver Hybrid IEM with 4 way crossover for extended bass response.
  • Packed with 64 Audio's patented tech - TIA, APEX and LID.
  • Built using 3DFit technology to ensure you get the perfect fit for your IEMs.
  • Detachable cable with 2-pin or industry leading IPX connections and memory ear hook
  • 3-way crossover.
  • Two choices of cable length as standard 48'' or 64''.



  • With 64 Audio, you can customise all aspects of your IEM from the shell, faceplate, cables, artwork, cables and more for a truly custom experience!
  • Simply choose from the drop down menus to configure your IEMs.
  • Any premium options will be reflected in the price, and 3D impressions are included for Free. 
  • Once ordered, we will confirm your choices with you to make sure we've got it perfect and get your impressions booked in!



  • 64 Audio Personalized Protective Case
  • Dehumidifier
  • Cleaning Tool
  • Shirt Clip
  • 48" or 64" Detachable Professional Cable (configurable)
  • m20 apex Modules
  • 64 Audio Round Sticker
  • Product Manual

64 Audio A4s

Shell Colour
    • Transducer Type: 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
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