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Your Ultimate Ears Match
Your Model
11
Your Fit
CSX

The UE 11 is a bass-lover’s dream. Crafted with 4 speakers in each earbud, you’ll feel every beat thanks to a built-in dedicated subwoofer that delivers tight and punchy bass. Vibrant mid and high-mid ranges shine through and beautifully complement your audio.


Which earphone is right for you?


  • UE 5
    2 Speakers
  • UE 7
    3 Speakers
  • UE 11
    4 Speakers
  • UE 18+
    6 Speakers
The UE 5 CSX features dual speakers. Vibrant and punchy, these earphones are the standard in high-performance earphones and are expertly tuned for everyday listening. Included Bluetooth and Aux cables are swappable and each include a mic for phone calls.
The UE 7 CSX features 3 speakers. They’re big, velvety, full of crispness and depth. With a focus on the mid-range, they are perfectly tuned for vocals, classical and jazz. Included Bluetooth and Aux cables are swappable and each include a mic for phone calls.
The UE 11 CSX features four speakers. They’re quick, punchy, tight, robust and full of low-end energy. With a dedicated sub speaker, they are perfectly tuned for big music and big beats. Included Bluetooth and Aux cables are swappable and each include a mic for phone calls.
The UE 18+ CSX features six speakers. They’re rich, detailed and dynamic. With highs, mids, and lows powered by dedicated speakers for maximum audio versatility, they are precisely tuned for all musical genres. Included Bluetooth and Aux cables are swappable and each include a mic for phone calls.
UE 11 CSX
UE 5 CSX
Speaker Configuration: 2 Speakers
UE 7 CSX
Speaker Configuration: 3 Speakers
UE 11 CSX
Speaker Configuration: 4 Speakers
UE 18+ CSX
Speaker Configuration: 6 Speakers
Color: Translucent Jet Black
Translucent Jet Black Translucent Lucky Red Clear Translucent King Blue Jet Black Wood Carbon Fiber Mother of Pearl
Translucent Jet Black Translucent Lucky Red Clear Translucent King Blue Jet Black Wood Carbon Fiber Mother of Pearl
Translucent Jet Black Translucent Lucky Red Clear Translucent King Blue Jet Black Wood Carbon Fiber Mother of Pearl
Translucent Jet Black Translucent Lucky Red Clear Translucent King Blue Jet Black Wood Carbon Fiber Mother of Pearl
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Tailored to your ears right from your home

Finding premium earphones with vibrant sound and perfect fit can be incredibly challenging. Starting with our unique at-home FitKit, we hand-craft your Ultimate Ears precisely to your unique shape. Three simple steps is all it takes to finally have studio-quality sound tailored just for you.
  • UE 5 2 speakers
  • UE 7 3 speakers
  • UE 11 4 speakers
  • UE 18+ 6 speakers

UE 5 CSX

The UE 5 CSX has two finely tuned speakers that are proprietary to Ultimate Ears, called balanced armatures. These speakers are professional grade and far superior to the standard speakers found in a majority of headphones. From the award-winning cable system to the connectors and interior wires -- you are getting the same exceptional product that touring musicians rely on for flawless performance.

UE 7 CSX

The UE 7 CSX has three finely tuned speakers that are proprietary to Ultimate Ears, called balanced armatures. These speakers are professional grade and far superior to the standard speakers found in a majority of headphones. From the award-winning cable system to the connectors and interior wires -- you are getting the same exceptional product that touring musicians rely on for flawless performance.

UE 11 CSX

The UE 11 CSX has four finely tuned speakers that are proprietary to Ultimate Ears, called balanced armatures. These speakers are professional grade and far superior to the standard speakers found in a majority of headphones. From the award-winning cable system to the connectors and interior wires -- you are getting the same exceptional product that touring musicians rely on for flawless performance.

UE 18+ CSX

The UE 18+ CSX has six finely tuned speakers that are proprietary to Ultimate Ears, called balanced armatures. These speakers are professional grade and far superior to the standard speakers found in a majority of headphones. From the award-winning cable system to the connectors and interior wires -- you are getting the same exceptional product that touring musicians rely on for flawless performance.

Custom Sound Profiles

With our proprietary EQ app, you can choose from a variety of presets optimized for different listening experiences. Find the perfect amplitude for podcasts, classical, jazz or heavy bass -- or play around with the frequencies to match your personal taste and then store them in your Bluetooth cable.

All Day Comfort

Having a secure, custom fit also provides the most important benefit if you use your earphones for extended periods of time -- all day comfort.  Ultimate Ears are designed so you can travel, work, listen at leisure and forget about common irritations like ear soreness.

Noise Cancellation

Ultimate Ears are custom fit to create the closest-fitting seal possible between the earphone and your unique ear shape. The advantage of this fit is the physical exclusion of external noise, or what’s called passive isolation. Passive isolation blocks out the sound that is trying to get in, versus introducing new sounds to block out ambient noise. The result is 26 decibels of noise cancellation, as much, or more, than most other earphones on the market.

Swappable Cables

Each pair of Ultimate Ears CSX earphones come with both Bluetooth and auxiliary cables. Both cables are sweatproof, include a mic for making phone calls and feature our award-winning cable connection system, allowing for a quick and easy transition from your Bluetooth wire to your hard-wired, so when your battery dies, or you want to plug into in-flight entertainment, you can do so with ease.

In the box

UE custom-fit earphones, Bluetooth cable with mic, USB charging cable, extra battery for Bluetooth cable, auxiliary cable with mic, personalized hard case.

Tech Specs

UE 5 CSX

2 proprietary balanced armatures with integrated 2-way crossover 

INPUT SENSITIVITY
119 dB @ 1 kHz, 1mW

FREQUENCY RESPONSE*
5Hz - 22kHz

NOISE ISOLATION
-26 decibels of ambient stage noise.

IMPEDANCE
21 Ohms @ 1 kHz

UE 7 CSX

3 proprietary balanced armatures with an integrated 2-way crossover

INPUT SENSITIVITY
124 dB @ 1 kHz, 1mW

FREQUENCY RESPONSE*
5 Hz - 22 kHz 

NOISE ISOLATION
-26 decibels of ambient stage noise. 

IMPEDANCE
17.5 Ohms @ 1kHz

UE 11 CSX

4 proprietary balanced armatures with 3-way crossover

INPUT SENSITIVITY
119 dB @ 1 kHz, 1mW

FREQUENCY RESPONSE*
5Hz - 22kHz 

NOISE ISOLATION
-26 decibels of ambient stage noise. 

IMPEDANCE
18 Ohms @ 1 kHz

UE 18+ CSX

6 balanced armatures and 4 passive crossovers

INPUT SENSITIVITY
105 dB @ 1 kHz, 1mW

FREQUENCY RESPONSE*
5Hz - 22kHz

NOISE ISOLATION
-26 decibels of ambient stage noise.

IMPEDANCE
37.5 Ohms @ 1 kHz

Bluetooth Cable Specs

BLUETOOTH VERSION

4.1, Multi-point

PROFILES

Handsfree, Headset, A2DP, AVCRP, SPP

INLINE MIC

MEMS, Omni directional

STANDBY TIME

110 Hrs**

CHARGING TIME

2.5 hours

BATTERY TYPE

60 mAh Lithium Polymer in the device

BATTERY VOLTAGE

3.7V