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In Ear Monitors


All prices include ear impression (moulding) service.

Experience unparalleled audio precision with our custom in-ear monitors. 

Investing the additional effort in acquiring custom in-ears yields substantial benefits, especially if you experience sound leakage or discomfort with your current monitors. Our custom in-ears necessitate a thorough ear impression, reaching the second bend of the ear canal. This depth and precision guarantees no sound leakage and protection from loud volumes on stage.


Ultimate Ear SoundEar custom silicone (£239)

The SoundEar is our entry level in-ear monitor, offering 31dB of isolation and powered by a single Knowles balanced armature driver. Crafted from our exclusive dual-grade medical silicone, these custom-made monitors come in a spectrum of colours and cable choices, and offer better noise protection over generic universal fit monitors. 

Speaker Specifications


A single balanced armature Knowles speaker.

Frequency Range: 200 Hz ~ 5 kHz

Impedance: 10.2 Ohms

Efficiency – dBA: 106.00

Available with a 3.5mm input connection (slim in-line jack) or a USB-C type connection.


Ultimate Ear SoundEar PRO 2 custom silicone (£429)

The SoundEar Pro 2 is equipped with two premium high-bandwidth Knowles balanced armature speakers for unparalleled sound performance. Featuring a single woofer and tweeter, this product delivers a high output SPL, making it indispensable for audiophiles and sound engineers alike. Compared to the SoundEar, the SoundEar Pro 2 offers a punchier low end and a more impressive mid-range. With 31dB of isolation consistent with our SoundEar range, the Pro 2 has been embraced by sound engineers and audiophiles alike.

Speaker Specifications


This product features 2 Knowles balanced armature speakers, a single woofer and a single tweeter. This product has a high bandwidth and a high output SPL.


Frequency Range: 50 Hz ~ 10 kHz

Impedance @ 1kHz: 112

Ohms Sensitivity to 100mV: 112 dB

Available with a 3.5mm input connection (slim in-line jack) or a USB-C type connection.

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ACS Evolve Ambient (£599)

The ACS Ambient series blend high-fidelity audio, soft silicone comfort and awareness of your surroundings. Combining 3 Knowles balanced armature speakers with a patented venting system, these monitors offer high detail audio monitoring without your ears feeling occluded.  

Features of vented monitors include: 

- Ability to perceive surrounding environment with a tuned vented port with a 17dB ambient attenuating filter (patented by ACS).

- Facilitation of communication with fellow musicians and reception of off-mic cues onstage.

- Preservation of connection to the performance environment, avoiding isolation.

- Ear canal ventilation to alleviate fatigue and enhance comfort during extended use.

Speaker Specifications


This product features 3 Knowles Balanced Armature Drivers: Single Low, Single Mid, Single High.


Frequency Range 20hz-20Khz

Input Sensitivity 119.9db @ 1Khz

Impedance 48ohms @ 1Khz

Input Connector Straight 3.5mm Gold-Plated

Noise Isolation 17dB reduction of ambient noise

Included extras

- Carry Case ACS

- Revivo2 - Electronic Dryer & Sanitiser

- Wax Removal Tool

- Comfort Cream

- 3.5mm to 1/4" Step-Up Adapter

- Care and Usage Instructions

The cable accompanying your ACS monitors is manufactured to the highest standard. Each cable comprises 80 strands of 100% oxygen-free copper, with every strand coated in pure silver. Woven into the twists are aramid fibers (Kevlar), enhancing the cable's pulling strength and resistance to breakage.

Why choose in ear monitors? 

In ear monitors (IEMs) are used by musicians who play live on stage, as well as audio engineers and audiophiles who require high fidelity sound production. Their main purpose is to allow professionals to hear an accurate mix of instrumentation on stage, and offer protection from the loud sound levels at live music venues. By enabling this effective monitoring of sound, a singer can perform in key, a guitarist can play in time and a sound engineer can ensure everything on stage is harmonious and balanced.

First brought to market in the 1980s, in-ear monitors offer a range of benefits over traditional speakers that face performers (known as monitor speakers or wedges). These include:


  • A better quality of sound direct to your ears. Because performers can each have a personalized mix sent to their IEMs, the days of each musician turning up their monitor speakers to hear themselves (leading to a cacophony of noise) are gone.

  • Your ears are protected. Most IEMs seal the ear effectively, acting as a default ear plug and providing sound isolation of anywhere between 20-35db depending on the design and fit. Customs do a far better job at this, particularly ones made out of silicone.

  • Minimal feedback. This is mainly a problem when tradition monitor speakers are cranked up, leading to a loud, often high pitched feedback sound. If everyone on stage is using IEMs, the ability of the sound engineer to control feedback is much greater as there are no speakers pointed at guitar amps and mics.

  • Less vocal exertion. Most singers tend to strain and sing louder if they can’t hear themselves, a common problem with loud and conflicting monitor speakers blaring at the stage. With IEMs the sound engineer can feed through to the vocalist a mix with their microphone more prominent than the rest of the band.

  • Control. Although the sound engineer determines the mix, you have control over the volume that ultimately meets your ears. Some transmitter packs also have a basic EQ function and limiter.

  • Mobility. It’s doesn’t matter if you stay on stage or backflip into the crowd, you’ll still get a reliable and accurate mix wherever you go.  

IEMs Are Only as Good as the Impressions Taken


Each IEM manufacturer has specific instructions for taking ear impressions. Good impressions ensure that IEMs are comfortable, have a good acoustic seal, and deliver the best possible sound quality. At Durham Hearing Specialists we take deep impressions using a fast-setting silicone composite. The IEMs are then uniquely crafted to fit your ears, with all components built into the molds. Only qualified audiologists with a minimum of four years of training and further post-qualification experience perform this process, ensuring you are in safe hands.

Talk to a specialist...

At Durham Hearing Specialists we work with a number of manufacturers to supply our clients with the very best custom monitors on the market, including Starkey, Minerva, ACS, Ultimate Ear and more. Our Audiologists have an in-depth knowledge of the ear and how monitors work, we can offer friendly and impartial advice on what solution will work best for you.

Ready to take the next step?

Book online or talk to our friendly team of experts

over the phone.

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