Why You Should Get It
  • 4 Precision tuned Balanced Armature drivers
  • 2 Dedicated drivers for Low Frequency production
  • One driver for Middle Frequency production
  • One driver for High Frequency production
  • Dual Bore Design
  • Detachable Standard Cable
  • Premium Package available!
Demo unit available for auditioning at our Tai Seng office!
Warranty
2 years (local)

The 4.Ai S, a hand crafted In Ear Monitor (IEM) utilizing the same internal design and components in the 4.A S  Custom In Ear Monitor (CIEM).

The 4.Ai S requires the same painstaking hand craftsmanship that all Heir Audio CIEMs require.  The 4.Ai S offers all the advantages of an IEM, built with the same exacting standards of all Heir Audio products.

The 4.Ai S, like its cousin the 4.A S offers a clean neutral sound signature that should satisfy those that listen to classical, jazz, and acoustic or those that demand accuracy and clarity. Hear every breath, every turn of the page, even the “tic” of a metronome. “If it’s in the music, it’s in the music.

 

Optional Premium Package

The Premium Package for the 4.Ai S is called the 4.Ai S+. These are on pre-order only basis, as they are custom made in the factory according to your order and will have longer delivery time than standard IEMs. 

It will include the following:

  • Magnus 1 Cable (default)
  • Engraved Carrying Case
  • The name Heir Audio or a word with less than 5 characters engraved on the shell
  • Choice of three faceplates - Burl Wood(default for Ai S series), Buck Eye Burl Wood or Black Mamba with Heir Audio Logo
Product Availability Preorder / Backorder (currently unavailable)
Product Type Earphone
Style/Type Universal In-Ear
Driver Configuration 4-Drivers (Balanced Armature)
Input Connectivity Options 3.5mm stereo
Colour Brown
Product Weight (g) 299
Warranty 2 years (local)

If you're based in Singapore

  • spend $300 or more for free doorstep courier delivery1.
  • add a few more bucks, for an even quicker prioritised delivery.
  • self-collection is possible at our Showroom, based in Ubi (nearest to MacPherson MRT). Find out where, and how to get to us here.
  • and yes, you may arrange your own 3rd party logistics to pickup your purchases on your behalf.
    GrabExpress, Lalamove, GoGoX, RydeSEND services are welcome.

 


 

Friends from Overseas, 

  • we do ship internationally.
  • shipping fees will be displayed during checkout.
  • do be aware of import tax/VAT that may apply.

 

Exclusions do apply. e.g. Bulky or odd sized products, products with gross weight 20kg and above, ex-demo products, products on clearance sales, orders that require installation/calibration, etc. We reserve the right to amend this list of exclusions at any time.

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The 4.Ai S, a hand crafted In Ear Monitor (IEM) utilizing the same internal design and components in the 4.A S  Custom In Ear Monitor (CIEM).

The 4.Ai S requires the same painstaking hand craftsmanship that all Heir Audio CIEMs require.  The 4.Ai S offers all the advantages of an IEM, built with the same exacting standards of all Heir Audio products.

The 4.Ai S, like its cousin the 4.A S offers a clean neutral sound signature that should satisfy those that listen to classical, jazz, and acoustic or those that demand accuracy and clarity. Hear every breath, every turn of the page, even the “tic” of a metronome. “If it’s in the music, it’s in the music.

 

Optional Premium Package

The Premium Package for the 4.Ai S is called the 4.Ai S+. These are on pre-order only basis, as they are custom made in the factory according to your order and will have longer delivery time than standard IEMs. 

It will include the following:

  • Magnus 1 Cable (default)
  • Engraved Carrying Case
  • The name Heir Audio or a word with less than 5 characters engraved on the shell
  • Choice of three faceplates - Burl Wood(default for Ai S series), Buck Eye Burl Wood or Black Mamba with Heir Audio Logo
Product Availability Preorder / Backorder (currently unavailable)
Product Type Earphone
Style/Type Universal In-Ear
Driver Configuration 4-Drivers (Balanced Armature)
Input Connectivity Options 3.5mm stereo
Colour Brown
Product Weight (g) 299
Warranty 2 years (local)

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Heir Audio 4.Ai S 4-Driver In-Ear Earphone
2 years (local)
S$659.00
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