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In-Ear Monitors

All ACS in-ear monitors (IEMs) have continued to evoke a positive response in the music industry worldwide. We engage directly with the pro-audio sector to constantly evolve our IEM range and specification to improve the emotion of the listening experience. This for thousands of musicians in various performance environments across the globe.

Our range of IEMs offer the perfect solution for musicians and music lovers alike with a sound quality second to none. ACS are one of the only companies in the world who are renowned for making their IEMs from soft medical-grade silicone, so as well as fitting perfectly they are the most comfortable IEMs on the planet.

All ACS IEMs proudly feature state-of-the-art Knowles© balanced armature drivers and our own proprietary crossovers to ensure you are hearing the music as it was intended to be heard together with pro-audio reliability and performance.

If you are struggling to decide which ACS In-Ear Monitor is right for you, then check this out. You maybe also want to have a look at our Photo Gallery.

Classic Series


The Classic Series continues to provide the same pro-audio high-fidelity listening experience developed from our T and Studio IEMs. This together with custom fit soft-silicone comfort.

Ambient Series


Custom fit vented IEMs with a professional specification just got a whole lot better! Our Ambient series are the only precision tuned vented IEM on the market that feature a patented ambient filter.

Live! Series


Be more in control with high fidelity in-ear monitor sound quality and bespoke and comfortable fit. Plus the ability to actively hear your ambient surroundings at a level you can control.



Versatility as well as incredible sound quality. Ready to use straight from the box or easily retro fitted to any ACS PRO Series custom earplugs to be instantly converted into a pair of custom fit IEMs.