Free worldwide shipping Free FedEx Priority over USD 250 Handmade in Singapore since 2008

Buying guide

Audiophile interconnect cables: XLR, RCA, 3.5 mm and 4.4 mm

Connect your player, DAC, amp or powered speakers with the same handmade wire as our IEM cables. Choose the wire, any length from 10 cm to 2 m, and the plug on each end: 3-pin XLR pairs (male or female), 4-pin XLR, RCA pairs, 3.5 mm, 4.4 mm and 2.5 mm balanced, 6.35 mm, 3.5 mm and 4.4 mm female sockets, USB-C and USB-A. From USD 40, handmade to order in Singapore and shipped worldwide with FedEx (free from USD 250).

Order

Build your interconnect

Premium interconnect

Choose the wire, the length and the plug on each end. From USD 40.

 Extension cables

3.5 mm or 4.4 mm plug to a matching female socket.

Builds

Common interconnects

Player or phone to amp or speakers

3.5 mm plug to RCA pair

Null AudioNull Audio configurator
Balanced player to balanced amp

4.4 mm plug to 3-pin XLR male pair

Null AudioNull Audio configurator
DAC to amp, unbalanced

RCA pair to RCA pair

Null AudioNull Audio configurator
DAC to amp, balanced

3-pin XLR female pair to 3-pin XLR male pair

Null AudioNull Audio configurator
4.4 mm headphone cable on a 4-pin XLR amp

4-pin XLR male to 4.4 mm female socket

Null AudioNull Audio configurator
Player to USB DAC

USB-C to USB-C, or USB-A to USB-C

Null AudioNull Audio configurator

Ordering

How to order

  1. Open the interconnect configurator.
  2. Choose the wire: copper lines sound warmer and fuller, silver lines more detailed; see our cables by sound.
  3. Set the length, anywhere from 10 cm to 2 m.
  4. Choose the plug for each end. XLR and RCA pairs use two runs of wire, so the wire price for the length is doubled.
  5. Need another plug or length? Ask us.

Questions

Common questions

What is a balanced XLR interconnect?

A cable that carries each channel on its own pair of wires, with 3-pin XLR plugs at both ends. It connects balanced outputs to balanced inputs, such as a DAC to an amp or monitors.

Can I connect my player’s 4.4 mm output to XLR inputs?

Yes, with a 4.4 mm to 3-pin XLR male pair. If your player has a line-out mode, use it, so the volume is set by the amp or speakers.

Why do XLR and RCA pairs cost more?

Each pair uses two runs of wire, one per channel, so the wire price for the length is doubled.

Which wire should I choose?

Match it to your system and taste, or to your IEM cable. All the wires from our IEM cables are offered, from Ethos to Istana.

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.

 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.

 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. 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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