$89.00 USD
Ethos Ultra is the coaxial evolution of Ethos: a 5N single-crystal copper signal conductor inside a silver-plated copper shield, with a Kevlar core for strength. The player end is detachable, and 3.5 mm, 4.4 mm balanced and a USB-C DAC plug all come in the box.
Choose your earphone connector and options below.
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Compatibility
Search your earphone to see which Headphone connection to choose for this cable. Most 2-pin IEMs take our standard 2-pin plug; some models need their own connector.
Ethos Ultra
A 5N single-crystal copper conductor, a silver-plated shield wrapped around it and a Kevlar core at the centre. Three plugs in the box, one cable for every source.
Construction
Each channel runs as its own coaxial line. The 5N single-crystal copper conductor carries the signal; the silver-plated copper spiral shield wound around it carries the return and shields the conductor at the same time.
At the very centre, a Kevlar fibre core takes the pulling strain, so the copper isn’t stretched when the cable is tugged, coiled or wound for the road.
Signal and return stay at a fixed, concentric spacing along the whole cable, and each channel keeps its own return, so 4.4 mm balanced is native.
Finish
Through the clear outer jacket you can see the silver-plated spiral shield that carries the return. Below the split, the coaxial leads are braided together.
Player Connection
The player end is detachable. A threaded, screw-locking connector swaps between 3.5 mm single-ended, 4.4 mm balanced and USB-C, all included.
The USB-C plug is a complete DAC with its own parametric EQ. More on that below.
Fit
Pre-formed ear guides keep the cable in place on stage and on the move. Colour rings mark each side: blue for left, red for right.
USB-C DAC + Parametric EQ
The USB-C plug is a complete 32-bit / 384 kHz DAC with a parametric equalizer built in. Shape the sound with the Null Audio PEQ app, write it to the DAC, and your tuning goes with the cable to iPhone and Android alike.
Get the Android appScan with your Android phone to download.
peq.null-audio.com
Tuning needs the Android app, or Chrome or Edge on a computer; iPhone browsers can’t connect to the DAC. Once written to the DAC, your EQ plays on iPhone too.
Single-crystal copper adds weight and body to the mids and bass. The silver-plated shield keeps the treble open. Coaxial shielding lowers the noise floor for cleaner imaging and detail.
Ratings are Null Audio’s listening notes, out of 10.
Compare
Ethos Ultra replaces the all-SPC braided Ethos MKVI. Most reviews on this page were written for MKVI.
| Feature | Ethos Ultra | Ethos MKVI |
|---|---|---|
| Construction | Coaxial, one line per channel | Braided, 116 threads per braid |
| Signal conductor | 5N single-crystal copper, 7 × 7 × 0.08 mm | Silver-plated copper, UPOCC cast |
| Return / shielding | Silver-plated copper spiral shield around each signal line | Braided SPC full-jacket RF shielding |
| Gauge | ≈23 AWG signal, ≈0.38 mm² return | 21.5 AWG |
| Strength member | Kevlar fibre core | — |
| Player end | Detachable: 3.5 mm, 4.4 mm and USB-C DAC included | One plug, chosen when ordering |
| USB-C DAC + PEQ | 32-bit / 384 kHz, EQ written to the DAC | — |
| Weight | ≈35 g | ≈26 g |
| Hardware | CNC aluminium, PVD gunmetal grey | Black / rose gold |
| Length | 1.2 m | 1.2 m |
In the box
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.
Designed, handcrafted and shipped from Singapore.
Built-to-order. Lead time around 1 week.
Ear guide (~10cm) is installed by default for commonly used IEM connectors (e.g. 2PIN, MMCX, IPX). Let us know if your IEM/headphone is modified or needs extra customization.
Oxidation and Anti-Yellowing
Bare copper and silver plating darken as they oxidise, and many clear cable jackets turn yellow with age. Ethos Ultra is built to avoid both.
Every strand is individually enamelled and sealed under an ultra-flexible PVC coating, so air and moisture never reach the metal and the conductor keeps its original colour. The silver-plated spiral shield around each signal line, 19 bundles of 7 fine wires wound in one direction, adds abrasion resistance, strength and flexibility.
The clear outer jacket is yellowing-resistant, so the silver shield underneath stays on show instead of fading behind a tinted sleeve.
Care
Coil it loosely in large loops and keep it in the included leather pouch when you’re on the move.
Unplug by holding the connector, not the cable, and avoid sharp bends right at the plugs.
To swap the player plug, unscrew the locking collar fully, then pull the plug straight out.
Wipe it with a soft, dry cloth, and keep it away from solvents and alcohol-based cleaners.
Every cable has a 1-year warranty. If anything goes wrong, contact us and we’ll take care of it.
Specifications
Reviews below include earlier Ethos generations (Ethos Series MKVI and before).
Rated 4.6 out of 5 from 224 reviews.
Elegant construction & presentation
This is worth way more than they charge. Quality of materials and build alone should make them 2x the price.
Great Cable
I replaced the cable on my Shure in-ear monitors with this cable. I am very happy with the cable.
AWESOME!!! Ethos Series MKVI Premium Upgrade Cable | IEM Sennheiser IE600
Great!!! The service was amazing and the package came on time. I ordered per FedEx Express Germany and all went smooth and fast. The quality + unboxing made me feel i have purchased something fancy and they are great for touring with my bands. No problem since (2 months). Keep in mind though the shipping costs are high and depending on what country, you'll have to pay custom service fees.
Fantastic experience with Null Audio.
The cable of my Sennheiser IE 300 failed far too quickly, so I decided to purchase the Ethos Series MKVI Premium from Null Audio. The entire process — from ordering to delivery — was exceptionally pleasant and clear. I had high expectations for this cable, but I can now say that those expectations have even been exceeded. The cable looks exceptionally high-quality, but it’s the sound that surprised me the most. I was already very satisfied listening through the Dragonfly Red, but with this cable everything sounds even more open and detailed. In short: a top-tier product and excellent service from Null Audio.
Great cable
I have the Sennheiser IE300 and the standard cable broke. I replaced it with the null audio version and I should have replaced it sooner. The Sennheiser cable feels flimsy and low quality compared to the null audio version. If the null audio version has good durability, then I will be returning again for any of my audio needs.
Great cable, sturdy quality
I've ordered a few times from here and I always come back. I've never paid for anything crazy high-end so I don't have a point of comparison there but the sound quality is noticeably better than some $60 cables I've ordered.
Questions
Every Ethos Ultra is built to order by hand in Singapore. Lead time is around 1 week.
Choose your earphone connector in the configurator above. FlexiPlug lets you switch between 2PIN, IE300, A2DC, IPX, Pentaconn Ears and QDC 2PIN. If your earphones are modified or need a custom fit, contact us before ordering.
Yes. The player end is detachable with a threaded, screw-locking connector, and the 3.5 mm, 4.4 mm balanced and USB-C plugs are all included.
It is a complete 32-bit / 384 kHz DAC with parametric EQ. Tune it with the Android app, or at peq.null-audio.com in Chrome or Edge on a computer, then write the EQ to the DAC.
It is made for in-ear monitors. Its built-in Class G amplifier drives earphones from 16 Ω directly, with no output coupling capacitor. For full-size or hard-to-drive headphones, use the 3.5 mm or 4.4 mm plug with a dedicated amplifier.
Yes. Plug the USB-C DAC into a USB-C iPhone and listen. iPhone browsers can’t connect to the DAC for tuning, so set your EQ once with the Android app or a computer and write it to the DAC; it then plays the same on iPhone.
Yes. Contact us or WhatsApp +65-8731-5476 for custom builds.
It’s built not to. Every strand is individually enamelled and sealed under a PVC coating, which protects the copper and silver plating from oxidation and colour change, and the clear outer jacket is yellowing-resistant.
Standard builds can be returned within 14 days of confirmed delivery if unused and in their original packaging. Change-of-mind returns carry a 30% restocking fee, and shipping is not refunded.
Custom spec, length or connector builds cannot be returned for a change of mind once production starts. Faults are a different matter: every cable has a 1-year warranty, so contact support@null-audio.com and we will assess it.
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