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FlexiPlug
Swap the earphone connector on one cable.

Ethos Ultra coaxial IEM cable with 3.5 mm plug, coiled on a dark studio backdrop

Ethos Ultra Coaxial Upgrade Cable for IEM | Headphone

$89.00 USD

Guides

Find a cable for your IEM

Search over 400 earphones to see which connector to choose.

Find my IEM

Support

Flat-rate repairs for cables and IEMs, even after the warranty ends.

Got a question? Start with our FAQ.

Compatibility guide

Cables for Ultimate Ears

Current UE Pro custom IEMs use IPX, and UE’s universal UE 150, UE 250 and UE 350 use T2. Choose IPX for both: our IPX plug fits T2 sockets.

Quick facts

Connection

Current UE Pro customs

IPX. UE says its current custom cables use IPX connectors.

ManufacturerUE LIVE
UE 150, 250, 350

T2. UE’s universal replacement cable lists T2 connectors for these models.

ManufacturerUE universal cable
SL socket

Fitted to some UE Pro customs. SL cables do not fit T2 or the older 2-pin sockets.

ManufacturerUE SL cable
Options to choose

IPX (IPX and T2), UE/UM/QDC 2PIN Legacy (older 2-pin), UE TF10, MMCX (UE 900s)

Null Audio configuratorNull Audio configurator, Headphone connection
SL socket

We can make an SL plug on request. It is not listed in the configurator; contact us to order.

Null AudioNull Audio
Legacy 2-pin

We can make cables for older UE 2-pin customs. Choose UE/UM/QDC 2PIN Legacy.

Null AudioNull Audio

Models

Which option for each model

Each row shows the option to choose.

UE 18+ PRO (custom) (2018)

Choose IPX. IPX.

Manufacturerpro.ultimateears.com
UE LIVE (custom) (2018)

Choose IPX. IPX.

Manufacturerpro.ultimateears.com
UE 900s (2014)

Choose MMCX. MMCX.

Published reviewsoundandvision.com
UE 150

Choose IPX. T2. T2 sockets take our IPX plug.

Manufacturerpro.ultimateears.com
UE 250

Choose IPX. T2. T2 sockets take our IPX plug.

Manufacturerpro.ultimateears.com
UE 350

Choose IPX. T2. T2 sockets take our IPX plug.

Manufacturerpro.ultimateears.com
UE 5 PRO (custom)

Choose IPX. IPX.

Manufacturerpro.ultimateears.com
UE PRO custom with SL socket

Choose UE SL plug (on request). Own connector. Not in the configurator; contact us to order.

Manufacturerpro.ultimateears.com

Ordering

How to order

  1. Pick a cable from the list below.
  2. Under Headphone connection, choose IPX.
  3. Choose the player plug that matches the output you use most; see choosing the player plug.
  4. Not sure which socket your earphone has? Send us the model and a close photo of the socket before you order.

Before you order

Check your earphone

  • If you are not sure which socket your UE custom has, send us a photo before ordering.

Cables

Cables you can order with this connector

Each cable below offers IPX under Headphone connection. Prices start from the base configuration; the connector and plug you choose can change the price.

Lune Series MKVIII Premium Upgrade Cable for Headphone | IEM

Headphone connection: IPX

 From $149.00 USD Tiburon MKIII UP-OCC Cryo Copper Headphone/IEM Cable

Headphone connection: IPX

 From $199.00 USD Arete Series MKV Premium Upgrade Cable for Headphone | IEM

Headphone connection: IPX

 From $109.00 USD Thera MKIII UP-OCC Cryo Silver Headphone/IEM Cable

Headphone connection: IPX

 From $399.00 USD Brevity Pro 5N CGOCC-A Copper Earphone Cable

Headphone connection: IPX

 From $49.00 USD Ethos Ultra Coaxial Upgrade Cable for IEM | Headphone

Headphone connection: IPX

 From $89.00 USD Capri Balanced Digital Earphone Cable with Hi-Res DAC

Headphone connection: IPX

 From $49.00 USD Hakone MKIII UP-OCC Cryo Silver/Copper Headphone/IEM Cable

Headphone connection: IPX

 From $299.00 USD Aoraki MKIII Gold Silver Tri-Hybrid Headphone/IEM Cable

Headphone connection: IPX

 From $699.00 USD Nyx+ BT5.3 Wireless In-Ear Monitor Cable

Headphone connection: IPX

 From $89.00 USD Epsilon MKIII Premium Upgrade Cable for Headphone | IEM

Headphone connection: IPX

 From $129.00 USD Istana Graphene Coated Copper Hybrid Headphone/IEM Cable

Headphone connection: IPX

 From $1,099.00 USD

Install record

Our fit check

Questions

Common questions

My UE custom is several years old. Which option?

It may have IPX, legacy 2-pin or SL, and we can make all three. UE says the model name and date do not reliably tell which, so send us a photo of the socket.

Which option for the UE 900s?

MMCX.

Keep reading

More guides

Find a cable for my IEM

Search 400+ earphones by brand or model.

 IEM connectors explained

2-pin, MMCX, IPX, A2DC and FlexiPlug.

 Choosing the player plug

3.5 mm, 2.5 mm, 4.4 mm, XLR and USB-C.

 Sennheiser IE 200 / IE 300 / IE 600 / IE 900

Choose IE300/600/900. Recessed MMCX socket.

 Sennheiser IE 40 PRO / IE 400 PRO / IE 500 PRO / IE 80

Each has its own option, not standard MMCX.

 Sony IER-Z1R / IER-M9 / IER-M7 / XBA

IER-Z1R: choose Sony IER-Z1R. IER-M7: MMCX.

 Etymotic ER4SR / ER4XR / ER4P / ER2

ER4SR/XR: keyed MMCX. Older ER4P/B/S: own option.

 Shure SE846 / SE535 / SE215 / AONIC

Standard MMCX.

 64 Audio

Universals: Flat 2-pin. Aspire: IPX. Customs: IPX or Flat 2-pin, matching your socket.

 JH Audio

4-pin: JH w Bass Control. 7-pin: JH 7-pin.

 Westone MACH / Pro X

T2 socket: choose IPX. Older W and UM Pro: MMCX.

 Campfire Audio

Most models: MMCX. Andromeda 10, Chimera: 2-pin.

 Audio-Technica

Choose A2DC. IM series: plug on request.

 AAW (Advanced AcousticWerkes)

Choose Standard 2-pin. Nebula One: fixed cable.

Sources

Sources

  1. Ultimate Ears — UE LIVE Current custom cables use IPX.
  2. Ultimate Ears — universal cable T2 for UE 150/250/350.
  3. Ultimate Ears — SL cable SL socket; model and date do not reliably tell which socket a custom has.
  4. Null Audio configurator, Headphone connection Options offered on each cable. Snapshot 16 Oct 2026.

Prepared 17 Oct 2026. Not yet reviewed by Null Audio.

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