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Compatibility guide

Sennheiser HD 600 and HD 650 replacement and upgrade cables

Replacement and upgrade cables for the Sennheiser HD 600 and HD 650, handmade to order in Singapore from USD 89 and shipped worldwide with FedEx (free from USD 250).

The HD 600, HD 650, HD 660S and HD 660S2 share Sennheiser’s 2-pin headphone connector. Choose Sennheiser HD600/650 under Headphone connection, then the plug: 4.4 mm or 4-pin XLR for a balanced amp, or 3.5 mm. Every cable is handmade to order in Singapore and ships worldwide with FedEx.

Cables

Cables you can order with this connector

Each cable below offers Sennheiser HD600/650 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: Sennheiser HD600/650

 From ₩205,000 Tiburon MKV UP-OCC Cryo Copper Headphone/IEM Cable

Headphone connection: Sennheiser HD600/650

 From ₩274,000 Arete Series MKVI Premium Upgrade Cable for Headphone | IEM

Headphone connection: Sennheiser HD600/650

 From ₩150,000 Thera MKV UP-OCC Cryo Silver Headphone/IEM Cable

Headphone connection: Sennheiser HD600/650

 From ₩548,000 Ethos Ultra Coaxial Upgrade Cable for IEM | Headphone

Headphone connection: Sennheiser HD600/650

 From ₩123,000 Hakone MKV UP-OCC Cryo Silver/Copper Headphone/IEM Cable

Headphone connection: Sennheiser HD600/650

 From ₩411,000 Aoraki MKIV Gold Silver Tri-Hybrid Headphone/IEM Cable

Headphone connection: Sennheiser HD600/650

 From ₩960,000 Epsilon MKIII Premium Upgrade Cable for Headphone | IEM

Headphone connection: Sennheiser HD600/650

 From ₩178,000 Istana MKII Graphene Coated Copper Hybrid Headphone/IEM Cable

Headphone connection: Sennheiser HD600/650

 From ₩1,509,000 Vanda 7N UP-OCC Cryo Copper Headphone/IEM Cable

Headphone connection: Sennheiser HD600/650

 From ₩342,000 Ethos MKVII Silver-Plated Copper IEM Cable

Headphone connection: Sennheiser HD600/650

 From ₩123,000

Quick facts

Connection

Null Audio Sennheiser HD 600 / HD 650 headphone cable plug
Our Sennheiser HD600/650 plugs.
Headphone connector

Sennheiser 2-pin, one on each cup; the same cable fits HD 600, HD 650, HD 660S and HD 660S2

ManufacturerSennheiser HD 660S2 cable
Option to choose

Sennheiser HD600/650 (HD 6XX, HD 58X: Sennheiser HD59X)

Null Audio configuratorNull Audio configurator, Headphone connection

Ordering

How to order

  1. Pick a cable from the list below.
  2. Under Headphone connection, choose Sennheiser HD600/650.
  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.

Questions

Common questions

Can I run the HD 650 balanced?

Yes. Each cup has its own connector, so a balanced cable just needs a balanced plug: choose 4.4 mm or 4-pin XLR.

More on Sennheiser headphone cables?

See our Sennheiser HD cable guide and the headphone cable finder.

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 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.

 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: HD 660S2 cable Compatible with HD 600, HD 650, HD 660S, HD 660S2.
  2. 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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