Shipped from Singapore; delivery options and costs shown at checkout Free FedEx Priority over USD 250 Handmade in Singapore since 2008

Compatibility guide

Sennheiser IE 200, IE 300, IE 600 and IE 900 replacement and upgrade cables

Replacement and upgrade cables for Sennheiser IE 200, IE 300, IE 600 and IE 900, handmade to order in Singapore from USD 49 and shipped worldwide with FedEx (free from USD 250).

Choose IE300/600/900 under Headphone connection. These Sennheiser models use an MMCX socket set into a recess in the earpiece, and we make a separate plug for it. Do not choose standard MMCX.

Cables

Cables you can order with this connector

Each cable below offers IE300/600/900 under Headphone connection. Prices start from the base configuration; the connector and plug you choose can change the price.

Lune Series MKIX Premium Upgrade Cable for Headphone | IEM

Headphone connection: IE300/600/900

 From ¥1,015.00 Tiburon MKV UP-OCC Cryo Copper Headphone/IEM Cable

Headphone connection: IE300/600/900

 From ¥1,355.00 Arete Series MKVI Premium Upgrade Cable for Headphone | IEM

Headphone connection: IE300/600/900

 From ¥743.00 Thera MKV UP-OCC Cryo Silver Headphone/IEM Cable

Headphone connection: IE300/600/900

 From ¥2,717.00 Brevity Pro 5N CGOCC-A Copper Earphone Cable

Headphone connection: IE300/600/900

 From ¥334.00 Ethos Ultra Coaxial Upgrade Cable for IEM | Headphone

Headphone connection: IE300/600/900

 From ¥606.00 Hakone MKV UP-OCC Cryo Silver/Copper Headphone/IEM Cable

Headphone connection: IE300/600/900

 From ¥2,036.00 Aoraki MKIV Gold Silver Tri-Hybrid Headphone/IEM Cable

Headphone connection: IE300/600/900

 From ¥4,759.00 Nyx3 Wireless IEM Cable · Qualcomm QCC5181

Headphone connection: IE300/600/900

 From ¥606.00 Epsilon 5 Pro 6N UP-OCC Copper Headphone & IEM Cable

Headphone connection: IE300/600/900

 From ¥879.00 Istana MKII Graphene Coated Copper Hybrid Headphone/IEM Cable

Headphone connection: IE300/600/900

 From ¥7,482.00 Vanda 7N UP-OCC Cryo Copper Headphone/IEM Cable

Headphone connection: IE300/600/900

 From ¥1,696.00 Ethos MKVII Silver-Plated Copper IEM Cable

Headphone connection: IE300/600/900

 From ¥606.00

Quick facts

Connection

Earpiece socket

Gold-plated Fidelity (+) MMCX, recessed in the housing (IE 600)

ManufacturerSennheiser IE 600 product page
Plug size limit

Sennheiser: the recessed sockets support “4.8 mm and smaller”.

ManufacturerSennheiser IE 600 product page
Shared cables

Sennheiser lists its IE-series MMCX cables as compatible with IE 200, IE 300, IE 600 and IE 900, and describes the plug as MMCX “with proprietary Sennheiser recession”.

ManufacturerSennheiser MMCX cable for IE series
Stock cables

IE 600: 3.5 mm unbalanced and 4.4 mm balanced cables included; 2.5 mm sold separately.

ManufacturerSennheiser IE 600 product page
Option to choose

IE300/600/900, listed separately from MMCX

Null Audio configuratorNull Audio configurator, Headphone connection
Standard MMCX plug

Not for these models: their MMCX sockets are recessed. Choose IE300/600/900.

Null AudioNull Audio
FlexiPlug

FlexiPlug lists an IE300 tip among its supported connectors.

Null Audio configuratorFlexiPlug description on Null Audio cable pages

Models

Which option for each model

Sennheiser models with this socket. For IE 40 PRO, IE 100 PRO, IE 400 PRO, IE 500 PRO and IE 80, see Sennheiser IE PRO and IE 80.

IE 200 (2023)

Choose IE300/600/900. Recessed MMCX (Sennheiser), recessed socket. Also fits IE 200.

Manufacturerus.sennheiser-hearing.com
IE 600 (2022)

Choose IE300/600/900. Recessed MMCX (Sennheiser), recessed socket.

Manufacturerus.sennheiser-hearing.com
IE 300 (2021)

Choose IE300/600/900. Recessed MMCX (Sennheiser), recessed socket.

Manufacturerus.sennheiser-hearing.com
IE 900 (2021)

Choose IE300/600/900. Recessed MMCX (Sennheiser), recessed socket.

Manufacturerus.sennheiser-hearing.com

Ordering

How to order

  1. Pick a cable from the list below.
  2. Under Headphone connection, choose IE300/600/900.
  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

  • Look at the earpiece: the MMCX socket sits at the bottom of a round recess. If yours is a flat, exposed MMCX socket, it is a different model; use Find my IEM.
  • IE 300, IE 600 and IE 900 ship with cables that end in 3.5 mm or 4.4 mm. Pick the same plug if you want to keep using your current source.

From customers

What owners have told us

Customer reviews on our store, summarised. They describe one owner’s experience and are not a fit test.

Ordered with standard MMCX by mistake for an IE-series earphone; support changed the order to the IE300/600/900 connector before assembly.

Customer reportAoraki review, Null Audio store

Uses the cables with an IE 600 and describes the connectors as accurate.

Customer reportReview on the Lune Series page, Null Audio store

Replaced a failed stock IE 300 cable with an Ethos.

Customer reportEthos review, Null Audio store

Moved from the stock 4.4 mm cable on an IE 900 to an Aoraki.

Customer reportAoraki review, Null Audio store

Questions

Common questions

Can I use a cable with standard MMCX plugs?

Choose IE300/600/900 instead. One customer ordered standard MMCX by mistake and support switched the order to IE300/600/900 before it was built.

Does the same cable fit IE 300, IE 600 and IE 900?

Yes. We offer one IE300/600/900 option for all three, and Sennheiser sells one replacement cable for the series.

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 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.

 Ultimate Ears (UE)

Current customs and UE 150–350: IPX. Older 2-pin and SL: UE/UM/QDC 2PIN Legacy.

 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. Sennheiser — IE 600 product page Fidelity (+) MMCX, recessed sockets, 4.8 mm limit, stock cables. Accessed 17 Oct 2026.
  2. Sennheiser — MMCX cable for IE series, 3.5 mm Same cable for IE 200/300/600/900; proprietary recession. Accessed 17 Oct 2026.
  3. Sennheiser — MMCX balanced cable for IE series, 4.4 mm Accessed 17 Oct 2026.
  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.