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Custom In-Ear Monitors

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  • avant custom iem front view with cable
    soundz avant universal in ear monitor front view in black with cable attached
    Soundz Soundz Avant IEM
    from $1,633.00

    Experience your endgame with the Soundz Avant. Designed for music lovers and audiophiles, this endgame IEM covers all the bases. With cust...

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fir audio custom iem front view with jk lettering

Nothing can beat custom IEMs when it comes to comfort and fit. Unlike mainstream universal IEMs built around a generic shell design, custom in-ear monitors are molded according to your unique ear shape, which results in improved comfort, noise isolation, durability, and sound for an infinitely superior listening experience. 

Our collection of custom IEMs features some of the best custom in-ear monitors in the market right now. Browse through premium custom IEMs from 64Audio and FiR Audio and buy the right IEMs for your needs. 

How do I choose a Custom IEM?

Like universal IEMs, custom in-ear monitors offer various tuning options and sound signatures to suit artists or audiophiles alike. When choosing your custom IEM, consider build time, driver configuration, and tuning for the best results.

Universal IEMs and Custom IEMs of the same make and model typically employ a similar driver setup and tech package. The main difference is that custom IEMs are custom-built and boast a fit that trumps even the most comfortable universal in-ear monitors.

The materials used for custom IEM shells are pretty similar between manufacturers. Typically, audio brands will use medical-grade resin material for the shell and combine it with a custom faceplate. Build time will vary between manufacturers, but expect to wait at least a few weeks to get your custom IEMs.

Another factor to consider is driver count and tuning. You’ll find custom in-ear monitors with as few as two drivers up to crazy 18-driver solutions. In terms of tuning, custom IEMs offer various flavors to suit every type of listener. There are bassy audiophile-friendly IEMs for personal listening as well as studio-reference-grade tuned IEMs for studio or onstage use.

Get the best in-ear comfort with Custom-Molded IEMs

64 audio a4s torquoise custom iem front view with cables

Custom-molded in-ear monitors offer an unbeatable combination of sound, comfort, and durability, making them the superior type of IEM for both personal or professional use.

Built using an accurate impression of your ear’s unique anatomy, custom-molded IEMs offer a glove-like fit that disappears in your ear, resulting in comfort and fit you won’t get with universal in-ear monitors. Sound is improved as well, thanks to the superior fit and noise isolation, and durability is a step above due to more stringent quality control. 

Premium features come at a premium price, so expect to pay extra for custom-molded in-ear monitors. When it is all said and done, custom in-ear monitors will be well worth your money, as you’re getting unbeatable quality, sound, and comfort by going with custom-molded IEM. 

At HiFiSoundGear, getting Custom IEMs has never been easier. Just choose your preferred CIEM, proceed through checkout, and we’ll reach out to you with instructions on choosing your custom options. We’ll help you find audiologists in your area so you can get your impressions done as soon as possible. 

Depending on the manufacturer, Custom IEM build times typically take a couple of days to several weeks. The sooner you get your impressions done, the faster you can enjoy your shiny new Custom IEM.

Explore the wide range of Custom IEMs from HiFiSoundGear. Proceed to checkout with your preferred CIEM model, and we’ll handle the rest.

HiFiSoundGear Recommended Custom IEMs

64Audio A3t, A4s, A6t, and N8 IEM

64Audio A3t front view

64Audio A3t IEM

Price: $899.00

*comes with 1-Month TIDAL HiFi Plus Subscription

VIEW 64AUDIO A3t
64Audio A4s front view

64Audio A4s IEM

Price: $1,099.00

*comes with 1-Month TIDAL HiFi Plus Subscription

VIEW 64AUDIO A4s
64Audio A6t front view

64Audio A6t IEM

Price: $1,299.00

*comes with 1-Month TIDAL HiFi Plus Subscription

VIEW 64AUDIO A6t
64Audio N8 front view

64Audio N8 IEM

Price: $1,699.00

*comes with 1-Month TIDAL HiFi Plus Subscription

VIEW 64AUDIO N8

Experience top-tier Custom IEMs with 64Audio

64Audio's Custom IEMs are an exceptional choice for personal or professional audio monitoring work. The A3t, A4s, A6t, and N8 feature high-quality custom builds specifically made to provide the best in-ear fit and comfort while offering feature unique driver setups and sound profiles to suit your sonic preferences.

Get top-tier fit, comfort, build quality, and sound that you can depend on at home, in the studio, or onstage with 64Audio IEMs.

Custom In Ear Monitor for Musicians

64Audio A18t IEM

64 Audio A18t IEM front view with cables

Price: $2,999.00

*comes with 1-Month TIDAL HiFi Plus Subscription*

Supreme audio clarity with exceptional built quality and comfort.

The 64Audio A18t is an 18-driver custom IEM with a warm-neutral tuning perfect for onstage or studio use. 

The A18t features a multi-driver Balanced Armature driver setup. Eight BA drivers handle the bass, while another eight drive the mids. There's a BA driver for high-mid and a Tia high driver to handle the ultra-high frequencies. 

The overall sound signature of the A18t is warm neutral - a type of tuning that gives instruments and vocals outstanding weight, impact, and power. 

Bass on the A18t reaches effortlessly into the sub-bass regions and rumbles with shocking detail. The impressive sub-bass performance extends to the mid-bass, giving it a nice natural-sounding punch. 

The midrange on the A18t is ultra-clear, detailed, and well-separated. The mid-bass lift enhances male vocals for extra power and impact, while female vocals get good body and weight from the low-end emphasis. As expected from a warm-ish midrange, instruments sound wonderful on the A18t. Bass guitars sound nice and thick, while drums and percussions sound impactful and natural. 

The treble on the A18t sounds smooth yet sparkly. The Tia high driver works its magic here - it extends the A18t’s treble without sounding harsh or thin. Female voices extend effortlessly without losing their natural tone and body, while cymbals and other high-frequency sounds remain smooth. 

On to comfort and fit, the A18t offers exceptional fit and comfort, thanks to the ultra-accurate 3D printed shells and comfort-enhancing Apex Modules. The 64Audio A18t’s shape is molded according to the user’s ear, fit and comfort will never be an issue. 

64Audio A18t box and accessories
Pros
  • Endgame resolution and clarity.
  • Warm-neutral tuning with exceptional instrument separation.
  • Great detail retrieval with pinpoint positioning.
Cons
  • High price tag.

Best Custom IEM for Audiophiles

FiR Audio Radon 6 IEM

FiR Audio Radon 6 front view

Price: $3,299.00

*comes with 1-Month TIDAL HiFi Plus Subscription*

Limited-run custom IEM with top-tier detail retrieval and tactile bass

FiR Audio’s Radon 6 is an IEM created to commemorate the 5th anniversary of FiR Audio. With only 300 units released, the FiR Audio Radon 6 is an ultra-rare IEM offering a unique set of technologies and a sound signature you won’t find anywhere else.

The Radon 6 is a six-driver IEM featuring one “Kinetic Bass” 10mm dynamic driver for the bass, two Balanced Armature drivers for the mids, one BA driver for the high-mid, and an electrostatic driver for the ultra-high frequencies. 

You get two build options for the Rn6 - a universal option with a beautiful metal build and a highly customizable custom-molded option. Both options feature FiR Audio’s ATOM Modules and the Kinetic Bass 10mm driver. 

On to the sound, the FiR Audio Rn6’s sound signature is detailed and engaging. Tuning is bass-centric but with great extension in the higher frequencies for a detailed and sparkly sound. 

Bass is the most impressive thing about the Radon 6. The 10mm dynamic driver pumps sound and vibrations directly into your ear lobes, delivering bass you can feel. There’s enough quantity to satisfy bass heads, but the bass presentation is impressively fast and well-controlled. 

The mids on the RN6 are exceptionally natural. Male and female voices come through with satisfying weight and tone, while instruments like guitars are presented with detail and clarity. 

The treble on the FiR Audio Radon 6 is well-extended and effortlessly adds sparkle and air to any music. The treble extension is so generous it verges on sounding too exciting. The Rn6 delivers eye-opening detail at the highest end, which is exciting but can be fatiguing after some time. 

Overall, the FiR Audio Radon 6 delivers an ultra-detailed listening experience that’s perfect for audiophiles chasing ultimate detail and resolution from their music. 

FiR Audio Radon 6 custom IEM view
Pros
  • Top-tier clarity and resolution.
  • Insane bass quality and quantity.
  • Soundstage adapts to the music.
  • You can feel the sound through Kinetic Bass.
  • High-quality custom build.
Cons
  • High price tag.
  • Mids lack a bit of low-end grunt.

Best Custom IEM for Bass Players

64Audio N8 IEM

64Audio N8 front view

Price: $1,699.00

*comes with 1-Month TIDAL HiFi Plus Subscription*

Warm tuning with powerful bass and smooth highs

The 64Audio N8 is a signature custom IEM built for the legendary bassist and vocalist Nathan East. 64Audio tuned the N8 according to Nathan East’s inputs, you can be sure the N8 will deliver the best custom IEM experience for bass players and bass lovers. 

The N8 is a custom-molded, 9-driver hybrid IEM with one 9mm dynamic driver for the bass, six Balanced Armature drivers for the mids, one Balanced Armature driver for the high-mid, and a Tia high driver for the ultra-high frequencies. 

As you would expect from an IEM built for a legendary bassist, the N8 delivers a smooth, warm, and thick sound signature - perfect for reproducing bass notes. 

Bass on the N8 is best described as organic, natural, and powerful. The N8 reaches deep into the sub-bass and delivers sub-bass notes with a satisfying rumble. The mid-bass slams with authority and power. The presentation here is thick and weighty, but there’s a satisfyingly organic feel with how the notes arrive and disappear. 

Despite the substantial bass response, the mids on the N8 are tuned a bit leaner - likely meant to add detail and texture to higher-end notes on the bass guitar. Still, the tuning is great here, and the notes sound accurate and organic. 

The upper mids and treble on the N8 are smooth and natural. You won’t get sparkly highs here, but the Tia high driver delivers just enough extension to keep notes sounding clear and detailed. 

As mentioned, the 64Audio N8 is custom-molded only, so expect an outstanding fit out of the box. You can customize the N8’s shell color, faceplates, and logo design to suit your preferences, and you also have the option of swapping out the Apex Modules to alter the sound to your liking. 

64Audio N8 package contents
Pros
  • Smooth organic sound signature.
  • Viceral bass response with good separation between sub-bass and mid-bass.
  • Natural vocals and instrument presentation.
  • Smooth treble with good detail.
  • High-quality custom-molded shells.
Cons
  • Might sound a bit too smooth for those looking for more forward details.

Best Custom IEM for Drummers

FiR/Bellos Audio X4 IEM

FiR-Bellos Audio X-Series front view green with white background

Price: $999.00

*comes with 1-Month TIDAL HiFi Plus Subscription*

Unbeatable comfort with a smooth and detailed sound signature

Drummers need a great-sounding IEM that’s comfortable yet durable enough to withstand onstage abuse. The FiR/Bellos Audio X4 IEM is a strong candidate for the job.

The X4 is the top dog of the X-Series IEMs from FiR/Bellos Audio. It features a quad-driver setup with one 6mm dynamic driver for the sub-bass, two Balanced Armature drivers for the bass, mids, and highs, and a dedicated Balanced Armature driver for the ultra-high frequencies. 

The FiR/Bellos Audio X4 is custom-molded using a matte-finished polymer material for a grippy and comfortable on-ear feel. To enhance comfort even further, the FiR/Bellos X4 features a slew of comfort-centric technologies like ATOM Venting for reduced ear canal pressure, and improved seal through FiR/Bellos Audio’s unique In-Ear Canal technology. 

In terms of sound, the X4 delivers a warm-reference tuning - perfect for drummers, bassists, and audiophiles looking for a bassier sound signature. 

The bass on the FiR/Bellos Audio X4 is great. The dynamic driver delivers a satisfying slam and impact characteristic of well-tuned dynamic drivers. The bass presentation is tuned to deliver more mid-bass, but there’s enough sub-bass presence to deliver a satisfying rumble. 

The midrange on the FiR/Bellos X4 is tuned to sound natural. A warm tinge in the midrange gives vocals and instruments a full and weighty sound. The balanced tuning places sound towards the front of the mix for a more intimate and detailed presentation. 

The treble on the X4 is well-extended, which means high-frequency sounds can be a bit too energetic. Still, there’s enough control to keep things from sounding too thin or sharp, and you can always tame the treble by trying out various ear tips. 

FiR/Bellos Audio offers quick build times for their custom in-ear monitors. Their estimated build time for the FiR/Bellos X4 IEM is a brisk five days from when they receive your ear impressions, which means you won’t have to wait long to get your hands on the exciting FiR/Bellos Audio X4 IEM. 

FiR-Bellos Audio X-Series cable view hanging from above
Pros
  • Fast punchy bass with good separation between midbass and sub-bass frequencies.
  • Natural midrange sound.
  • Smooth, well-extended treble.
  • Ultra-comfortable soft-touch shell material.
  • In-Air Canal and ATOM Venting greatly enhances comfort.
Cons
  • Proprietary RCX cable limits cable-swap options.

Custom IEMs for Mixing

64Audio A6t IEM

64Audio A6t front view

Price: $1,299.00

*comes with 1-Month TIDAL HiFi Plus Subscription*

Remarkably balanced tuning with powerful realistic sound reproduction

If you’re looking for a custom IEM for serious mixing work, look no further than the 64Audio A6t. 

The 64Audio A6t is a six-driver custom IEM that employs six Balanced Armature drivers to deliver its top-tier sound. The A6t’s drivers are interconnected through 64Audio’s LID - a unique technology that balances out driver impedance for the best sound. You also get swappable 

Apex Modules for improved soundstage and in-ear comfort, alongside an ultra-comfortable fit thanks to 3D-Fit.

The A6t offers a well-balanced sound signature perfect for mixing work. With the M15 Apex Module, you get fast, accurate bass with enough power to keep instruments like kick drums from sounding weak and thin. 

The midrange is exceptionally clean and balanced, so vocals and instruments sound crystal clear and detailed. The balanced midrange tuning means vocals are positioned in the middle of the mix, and instruments fill the rest of the space around the vocalist. 

The treble is outstanding with the A6t. The Tia high-frequency driver makes reaching high-end notes effortless, which results in an airy and spacious sound. Despite the great extension up top, instruments sound accurate without sounding sharp or shrill. 

If it's an ultra-balanced high-resolution sound you’re looking for, you can’t go wrong with the 64Audio A6t. Its accurate tone and well-balanced detailed sound make it great for mixing your favorite audio tracks at home or in the studio. 

64Audio A6t package contents
Pros
  • Exceptional balance between bass, midrange, and treble frequencies.
  • Powerful bass with good rumble and punch.
  • Instruments and vocals are well-separated in the mix.
  • Natural vocals and instrument presentation.
  • Airy and sparkly treble.
  • High-quality custom shell build.
  • Swappable Apex Modules improve sound and comfort.
Cons
  • Tight-fitting shells might induce ear fatigue on long listening sessions.

Custom IEMs for Gaming

FiR Audio Xenon 6 IEM

FiR Audio Xenon 6 front view

Price: $3,899.00

*comes with 1-Month TIDAL HiFi Plus Subscription*

Unorthodox tuning delivers a bombastic and exciting listening experience

If you’re serious about gaming and want only the best custom IEM for playing your favorite games, you’ll find the FiR Audio Xenon 6 an excellent choice. 

FiR Audio Xenon 6 is a six-driver hybrid IEM that comes in either universal or custom build. Both options feature the same driver setup - four Balanced Armature, one dynamic driver, and one electrostatic driver. 

The Xe6 features FiR Audio’s ATOM Venting, RIGID, and OPEN ACOUSTICS technology for improved comfort, serviceability, and sound, respectively. 

In terms of sound, the FiR Audio Xe6 is a bass-heavy IEM. It does not feature the typical v-shape, u-shape, or even w-shape tuning that bassy IEMs tend to have. Instead, FiR Audio gave the XE6 a unique sound signature meant to give listeners the best sound experience possible. 

Starting with the bass, the Xe6 delivers a thick, powerful, and controlled bass. There’s loads of bass quantity in the sub-bass and midbass, but they never bleed into the mids, which results in a clean and well-separated bass presentation.

Mids on the Xe6 get a nice warm tinge as well, courtesy of the generous sub-bass and mid-bass elevation. Vocals sound smooth and natural, while instruments are presented with exceptional detail. You’ll easily hear details like guitar plucks and drumstick impacts with the Xe6. 

The Xe6’s treble is impressive as well. The electrostatic driver gives the Xe6 the ability to extend well into the highest frequencies without a hint of strain. High-frequency instruments like cymbals crash with authority and insane detail and sparkle. 

The FiR Audio Xenon 6 is an impressive bit of kit for music enjoyment as well as gaming. The Xe6’s bombastic sound will make your gaming sessions more engaging and immersive, and deliver a gaming experience like no other.

FiR Audio Xenon 6 custom iem variant
Pros
  • Eye-opening weighty bass with good rumble and punch.
  • Powerful yet natural vocals and engaging instrument presentation.
  • Good separation between different instruments in the mix.
  • Huge soundstage.
Cons
  • Not the best in noise isolation due to the Kinetic Bass ports.
  • High price tag.
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