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Ethos Series MKV Premium Upgrade Cable for Headphone | IEM

Signature Guide

At Null Audio, we are reluctant to simply define our cables into high-end or entry but a large variety of distinctive designs, material compositions, and binding architectures that performs largely different sonically and ergonomically. This guide is to help you find the perfect synergy with your source and headphone, rather than pursuing the price tags.

Introducing FlexiPlug

The FlexiPlug is a multi-connection system, enabling users to switch to adequate connectors for their IEMs.

Currently supporting 2PIN, IE300, A2DC, IPX, Pentaconn Ears and QDC 2PIN.

Technical Highlight

Silver-plated copper, UPOCC cast.

Litz 5 configured conductors

50% larger single-strand and larger overall wire cross-section than the previous generation for reduced impedance and more effective signal delivery

Ultra-clear, flexible and durable insulator

Premier CNC fabricated aluminum hardware with anodized/Electroplating finish


Conductor Material: Silver-plated copper

Wiring: 28 AWG

Length: 1.2m or 48" (Contact for customization)

Weight: ~19g

Connector Color: Black/Rose Gold

Solder: NA Custom 10% Silver Solder

Pin Contact: High precision fabrication, 24k gold plated

Warranty: 1 Year

Build Note

Designed, handcrafted and shipped from Singapore.

Built-to-order. Lead time around 1 week.

Optionally includes a inline remote supporting both iOS and major Android devices. The remote is equipped with a premium MEMS microphone for crystal clear call quality.

Ear guide (~10cm) is installed by default for commonly used IEM connectors (e.g. 2PIN, MMCX, IPX ect). Let us know if your IEM/headphone is modified or needs extra customization.

Customer Reviews

Based on 185 reviews
Joyce R. (Bengaluru, IN)
Phenomenal cable

Went from stock cable to Chi-Fi to Null Audio. I never realised that a couple of wires from NA could make such an IMMENSE difference to the SQ. Blown away by the quality of construction and the sound. Exceptional product.

Noel H. (San Juan, PH)
Worth the investment.

Decided to upgrade the cable of my Sennheiser IE600 to the Null Audio Ethos MKV. This is the first time I've spent this much on a cable but think that the investment was well worth it.


High quality cable. Good upgrade from the stock IE600 cable.

Anonymous (Portsmouth, GB)
satisfying purchase

I have received my upgraded cable for my IE300 for a while now and I highly recommend anyone using this particular iem to buy this cable! the original cable comes with IE300 has always bothered me as it feels uncomfortable around the ears but this cable is extremely flexible and I don’t need adjust it every time I took the iem off. the quality of the sound also is improved a lot, almost as good as 900.

Kent M. (South Bend, US)
First class product

Cable was exactly as requested. Connectors work fantastic, better than the stock cable. Packaging and product are luxurious. Premium experience all around.

ANDREW (Denver, US)
Definitely an Upgrade

Cable has definitely enhanced the listening experience. The broader sound stage, tonal quality and separation are exceptional.