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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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Product Details

Adding a touch of refinementACS T1 Triple Driver IEM

The new T1 utilizes the same three incredible drivers as its predecessor, offering the largest bass driver in our range alongside mid-range and treble drivers so clear and rich that you can pick out every nuance of your music. The integrated crossover means our engineers have been able to push this combination even further, giving you even more detail whilst retaining all of the body and breadth that you expect - resulting in perfect balance and unparalleled depth whatever it is that you’re listening to.

The same accommodating approach

Just like any ACS product, the new T1 is manufactured from soft medical grade silicone giving you a fit like no other earpiece. We use the softest material in the industry to give you unparalleled isolation in the most demanding environments with a consistent seal at all times and, because your earpiece can flex with your ear as you move or sing, your monitors stay comfortable without fatigue or irritation. In addition to comfort and isolation, using silicone allows us to seal the speakers into the mold and take control of their acoustic environment, meaning that we leave no room for the shape of your ear to affect how your monitors will sound or for your drivers to misbehave, so they sound just as our technicians intended every single time.

So much thought into such a small object.

ACS in-ear monitors are designed and produced according to some simple principles that we think help us to focus on what’s important rather than just chasing the pack. Our earpieces are flush and discreet in the ear, we don’t just throw more drivers into the mix in the hope that it will make the monitors sound better - particularly if that means delivering ear shattering volumes. We pay attention to every aspect of the T1, from the 3.5mm plug right to your eardrum to make sure it’s performing as it should. Based on our proprietary cable design, the new T1 offers removable cables featuring one of the smallest and most resilient connections around.

Keeping the connector as small as possible means that we can keep the cable discreet. Also by mounting the socket right in the silicon, we can ensure that your cables will stay in place during performance, but can also come loose if the cable is pulled from the ear - minimising the risk of damage. Not only that, but by simply moving the pins from the plug on the cable to the socket in your monitor we have minimised the chances of damage to the cable even when it’s not connected. With the pins in the socket sunk into your earpiece there is no chance of them coming to harm. With no pins at the cable end at all it’ll take a lot more than a size 13 Doc Marten to put you in need of a replacement.

All in the detail

It's the finishing touches that make every one of our hand-made monitors completely unique from a choice of cable colours to a selection of bespoke silicone finishes. Every monitor can be laser etched with lettering of your choice and is supplied in a customised rugged case to ensure your monitors are protected wherever you might travel.

The home of audio innovaton

In choosing ACS you’re choosing a refreshingly different approach to innovation. Our products have been designed and refined by everyone from our customers and sales people all the way to our lab technicians and acoustic engineers, so you can benefit from all of their combined experience. With a dedication to leading rather than following the field, ACS has set the bar for second generation silicone in-ear monitor design leaving others replicating our first generation breakthroughs.


MSRP $999.00

This product does not feature built-in, flat response microphones.


Active Drivers  3
Build Material 40 Shore Silicone with SteriTouch
Mold Type Full Concha
Cable Type Kevlar reinforced with anti-friction sheath
Standard Cable Color Translucent
Standard Color Clear
Connector 3.5mm gold plated molded
Standard Cable Exit Top (over the ear)
Frequency Response 16Hz ~ 20KHz
Noise Isolation 26dB
Impedance 17 Ohms
Items Included Carry pouch, personalised rugged case, wax pick, care and usage instructions, comfort cream, step-up jack connector adaptor





tems included...

  • ACS Monitor Case
  • Faux leather zip carry pouch
  • Wax Pick
  • Comfort Cream
  • Care and Instruction Booklet
  • 3.5mm to 1/4" inch step-up stereo plug

Optional extras...

  • Grips to aid removal
  • Cording - $10.00
  • Color (see chart below*) - $10.00
  • Laser Etching - up to 10 characters - Available soon in the US!

T-Series In-ear monitors are available in the following silicone colours..

Live Colours

    Clear   Smoke Grey


The Gadget Show award the ACS T1 Classic the highest score of 5G's on the show...

Mark Ward writes about his ACS T1 Classic

I received my T1s earlier, and what can I say: the sound is absolutely phenomenal. They're a huge improvement on the T2s.

The bass is absolutely perfect: very balanced, tight, and powerful without being overbearing. This complements and completes the whole sound for me, and brings the sound to life. The bass also vibrates nicely (where required) giving an almost subwoofer-like "thump": something I've never heard from in-ears before, and they put my huge Beyer DT770s (and others) to shame in all aspects. Getting the T1 upgrade was a great decision, and I'm very glad I asked you about this!

Their soundstage is much wider as well, giving better space and ambience where appropriate; and the separation between instruments is excellent. There's an incredible amount of detail there - I've heard new effects/parts/imperfections that I've never heard before on my studio headphones (a selection of Beyers) or even my Genelec 1031 near-field monitors (partly due to the isolation, no doubt).

Their whole sound is very tight, rich, controlled, balanced, natural; and they're incredibly flexible. Often (as was the case with the T2s) earphones/speakers excel at one thing - often female vocals/acoustic/ballads etc. - while contrasting genres e.g. rock and dance are nowhere near as impressive. However, I've thrown just about everything at the T1s over the last hour and a half: jazz, classical, rock, metal, electronic, pop, dance, acoustic, live, and they excel at everything. Being a pianist myself, I always notice that pianos particularly tend to lose some of their magic and sparkle with in-ears (compared to full headphones), and can also sound harsh and too cutting, but they sound perfect here. Read more...

Comments from Sav Lomanto, a customer that bought an ACS T1 Classic

Firstly, I love these earphones, the sound is phenomenal! I can’t believe how good they sound! I’m not an audio expert, but I do listen to about 8hrs of music most days and encompass most genres from classical through to heavy metal and dance music and can hear how good it all sounds

As long as the quality of the sound is top notch, everything I put through them sounds fantastic. They are so good. I can hear and identify every string being plucked on an acoustic guitar. I was also unaware that drums sounded as they do with the T1s, tight and unflabby!

I have found that the music needs to be at least 320Kb but Lossless is the preferred format. Although a lot of people say they can’t hear the difference between 320Kb and Lossless....I definitely can with the T1s. On the flip side, if the quality of the recording is low or the original recording has errors in it, you certainly know about it!

I have also found the cable to be the best I have used on earphones as they do not transmit any knocking or rubbing. Unlike some other people, I think the length of the cable is fine, as I can put my player in my trouser or coat pocket and there is plenty left to go over my ears, without tugging on my head. I am very, very happy with the T1s and would recommend them to anyone looking for high end monitors.

Comments from Mal Herring, a customer that bought an ACS T1 Classic

If you like listening then you'll love feeling it. Words cannot describe the feeling you get when you hear clarity that cannot be described. I was very sceptical spending such an amount on headphone but boys will be boys and I so I brought the best gadget I own.

Feeling like you're onstage with Queen or in the same room as Bill Withers while recording is amazing. Every note, every sound can be pinpointed in the room. No matter what's thrown at the T series you'll feel shivers as you wake to how good music can feel, no matter your taste, be that Prodigy or Pendulum to Duran Duran or Bob Dylan, Take it from me if you will - You'll never regret your first pair of T's