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Compatibility guide

Ultimate Ears replacement and upgrade cables

Replacement and upgrade cables for Ultimate Ears, handmade to order in Singapore from USD 49 and shipped worldwide with FedEx (free from USD 250).

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. Older UE customs have either UE’s earlier 2-pin socket or the SL socket: choose UE/UM/QDC 2PIN Legacy for both.

Cables

Cables you can order with this connector

Every cable below offers IPX and UE/UM/QDC 2PIN Legacy under Headphone connection.

Lune Series MKIX Premium Upgrade Cable for Headphone | IEM

Headphone connection: IPX

 From ¥24,000 Tiburon MKV UP-OCC Cryo Copper Headphone/IEM Cable

Headphone connection: IPX

 From ¥32,000 Arete Series MKVI Premium Upgrade Cable for Headphone | IEM

Headphone connection: IPX

 From ¥17,600 Thera MKV UP-OCC Cryo Silver Headphone/IEM Cable

Headphone connection: IPX

 From ¥64,200 Brevity Pro 5N CGOCC-A Copper Earphone Cable

Headphone connection: IPX

 From ¥7,900 Ethos Ultra Coaxial Upgrade Cable for IEM | Headphone

Headphone connection: IPX

 From ¥14,400 Hakone MKV UP-OCC Cryo Silver/Copper Headphone/IEM Cable

Headphone connection: IPX

 From ¥48,100 Aoraki MKIV Gold Silver Tri-Hybrid Headphone/IEM Cable

Headphone connection: IPX

 From ¥112,400 Nyx3 Wireless IEM Cable · Qualcomm QCC5181

Headphone connection: IPX

 From ¥14,400 Epsilon MKIII Premium Upgrade Cable for Headphone | IEM

Headphone connection: IPX

 From ¥20,800 Istana MKII Graphene Coated Copper Hybrid Headphone/IEM Cable

Headphone connection: IPX

 From ¥176,700 Vanda 7N UP-OCC Cryo Copper Headphone/IEM Cable

Headphone connection: IPX

 From ¥40,100 Ethos MKVII Silver-Plated Copper IEM Cable

Headphone connection: IPX

 From ¥14,400

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
Older UE Pro customs

UE’s earlier 2-pin socket or the SL socket, depending on the build.

ManufacturerUE SL cable
Older 2-pin and SL sockets

Choose UE/UM/QDC 2PIN Legacy. Our Legacy plug fits both.

Null AudioNull Audio
Options to choose

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

Null Audio configuratorNull Audio configurator, Headphone connection

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/UM/QDC 2PIN Legacy. Own connector. Our Legacy plug fits the SL socket.

Manufacturerpro.ultimateears.com

Ordering

How to order

  1. Pick a cable from the list below.
  2. Under Headphone connection, choose IPX (current customs, UE 150–350) or UE/UM/QDC 2PIN Legacy (older 2-pin and SL customs).
  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.

Questions

Common questions

My UE custom is several years old. Which option?

It has IPX, the earlier 2-pin socket or SL. Choose IPX for an IPX socket, and UE/UM/QDC 2PIN Legacy for the earlier 2-pin or SL. UE says the model name and date do not reliably tell which, so send us a photo if you’re not sure.

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.

 HIFIMAN Sundara

Choose Dual 3.5 mm.

 Focal Clear, Clear MG

Choose Dual 3.5 mm.

 Sony headphones

Z1R, Z7: Dual 3.5 mm. 1A, M1ST, MV1, M1: Single 3.5 mm.

 Moondrop Chu 2

Choose Standard 2-pin.

 Shure SE215

Choose MMCX.

 Truthear Hexa

Choose Standard 2-pin.

 KZ ZS10 Pro, ZSN Pro X, EDX Pro, Castor

Choose KZ C-pin 0.75 2PIN, or the flat plug for flat sockets.

 Sennheiser HD 600 / HD 650

Choose Sennheiser HD600/650.

 Sennheiser HD 560S / HD 5x9

Choose Sennheiser HD 5x9.

 Sennheiser HD 800 / HD 800 S

Choose Sennheiser HD800.

 LETSHUOER S12, Ember, Astralis

Choose Standard 2-pin.

 7Hz Salnotes Zero, Zero:2

Choose Standard 2-pin.

 Truthear Gate, Hola

Choose Standard 2-pin.

 Moondrop Starfield, Starfield II

Choose Standard 2-pin.

 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.

 Moondrop

Choose Standard 2-pin. Original CHU: fixed cable.

 qdc and CCA

KZ, CCA: KZ C-pin 0.75 2PIN or KZ / 64 Audio 0.75 Flat 2PIN. qdc: UE/UM/QDC 2PIN Legacy.

 Truthear, Kiwi Ears, Simgot and more

Most: Standard 2-pin. Some: MMCX.

 Empire Ears

Choose Standard 2-pin.

 Vision Ears

Choose Standard 2-pin.

 Noble, UM, FiR, Softears, Symphonium, Elysian

Most: Standard 2-pin. Elysian: FlexiPlug.

 JOMO Audio

Choose Standard 2-pin.

 Dunu

Most: MMCX. Some: 2-pin.

 FiiO

Choose MMCX.

 final

Choose MMCX.

 beyerdynamic

DT PRO: Mini XLR 3PIN. T1, T5: Beyer T1/T5P.

 HIFIMAN

Most: Dual 3.5 mm. HE1000, early HE400i: Dual 2.5 mm.

 Audeze

Choose Mini XLR 4PIN.

 Focal

Most: Dual 3.5 mm. Utopia: Focal Utopia.

 4.4 mm balanced cables

Every cable with a 4.4 mm plug, and which FiiO players take one.

 2-pin IEM cables

0.78 mm, recessed or flat: Standard 2-pin.

 MMCX IEM cables

Shure, Campfire, FiiO, final, Dunu: MMCX.

 IPX IEM cables

64 Audio Aspire, UE customs, Westone T2: IPX.

 KZ

Raised socket: KZ C-pin 0.75 2PIN. Flat: KZ / 64 Audio 0.75 Flat 2PIN.

 Extension cables

3.5 mm and 4.4 mm extensions, or a longer cable up to 3 m.

 USB-C IEM cables

A DAC in the plug, for phones and laptops. Lightning too.

 IEMs for gaming

A mic cable turns your IEMs into a headset.
Interconnect cables

XLR, RCA, 3.5 mm, 4.4 mm and USB, 10 cm to 2 m.

 Visit our Singapore studio

76 Playfair Road. Auditions, ear impressions, pickup.

 Sony Walkman

WM1, ZX, DMP-Z1: 4.4 mm. A series: 3.5 mm.

 AKG N40 / N5005 / K712

N40, N5005: IE300/600/900. K712, K702, K371: Mini XLR 3PIN.

 4.4 mm balanced vs 3.5 mm

Is balanced worth it? Power, output impedance and when it matters.

 Best cables for Sennheiser IE 600

Our picks for IE 600, IE 300 and IE 900.

 Best IEM cables under $100 / $200

Our picks, and every cable in each band compared.

 2-pin vs MMCX vs IPX

How they compare in use, what wears and how to tell them apart.

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 on some UE Pro customs; 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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