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ACS Custom USA, LLC 

New York (Head Office)      Los Angeles

@ SIR Studios                   1616 Vista Del Mar
520 W 25th Street            Los Angeles, CA 
New York, NY                  90028

646 559 5642       




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In-Ear Monitors

We love music and want to share our passion with others. All of our in-ear monitors are hand crafted from medical grade silicone to give the user maximum comfort and the components are specifically chosen to ensure a listening experience like you wouldn't believe. 



Whether you perform professionally on stage or listen in the comfort of your own home we make it our mission to ensure that listeners hear absolute fidelity of the sound and don't have to crank it up to damaging volumes. The silicone warms up to body temperature so after a while of use it begins to feel like part of your ear and the rich tones feel like they are coming from the air. 



When we create our monitor range we don't just add another driver and call it ground breaking. We look at the build, the wiring, the crossover, the components, the cable, the plug, the joints, the finish and even the case we send them in so that every aspect of our product is delivering what we want it to.


Leo Top


tlive logo

Featuring a removable cable solution and built-in ambient ready microphones the Live! series brings over 2 years of research and development together as the most feature custom in-ear monitors available.



Used by many top musicians in the UK. The T series began with the single driver T3 and has since introduced a dual and triple driver version. Refined over time to include the very best components to provide a dynamic range and power to do your music justice. 



The T1 Live! brings over 2 years of research and development together as the most feature-rich custom in-ear monitor available. With the introduction of a new integrated crossover, proprietary replaceable cable system and in build sub miniture ambient microphones...


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The new ACS T1 incorporates the same integral cross over board and proprietary replaceable cable system used in the T1 Live! Replacing the T1 classic, the new ACS T1 delivers a sound signature that cannot be experienced from any other IEM...


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A completely fresh approach to dual driver in-ear monitor design with a complete ground-up redesign. Also includes built-in, sub miniture, wideband, flat response micrphones and a removable cable...


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Representing a new standard in dual driver in-ear monitoring. With the introduction of a new integrated crossover and a proprietary replaceable cable system...


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ACS Custom Fit Earphone Sleeves  

Experience your music on an entirely new level with tailor-made earphone sleeves. Manufactured individually for your ear giving unrivalled comfort, incredible noise isolation and delivering range and clarity that you won’t have heard before...


ACS Custom Earphone Sleeves  

The ACS T3 is the smallest and most discreet in-ear monitor in the range and uses the most accurate driver ever developed. A perfect lightweight solution with enormous range and stunning clarity...


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The only in-ear monitor from the range that is ready to use straight from the box. Includes a selection of interchangable tips to get the best fit in your ears so you can enjoy remarkable accuracy, smooth response and sparkling highs...


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