Free worldwide shipping over USD 250 Handmade in Singapore since 2008 Fits 400+ IEMs

Thera MKIII UP-OCC Cryo Silver Headphone/IEM Cable

Thera MKIII uses cryogenically treated monocrystalline 7N silver, 1.5 times larger in cross-section than the previous generation, for accuracy and vocal definition with 3D, life-like headroom and astute instrument separation.

  • 7N monocrystalline silver
  • Cryogenic treated
  • 24 AWG
  • ≈26 g
  • Ocean Blue NL4
Bass8.4Mids9.6Treble9.8Stage9.5Detail9.6
Configure your cable

Choose your earphone connector and options below.

  • Built to orderShips in about 1 week
  • 14-day returnsStandard builds · conditions apply
  • 1-year warrantyOn every cable
  • Handmade in SingaporeChat and phone support

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Compatibility

Will it fit my IEM?

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.

Unparalleled accuracy.

Thera MKIII

Unparalleled accuracy.

Monocrystalline 7N silver, cryogenically treated, for vocal definition and a sound with every veil removed.

  • 7N Monocrystalline silver
  • 1.5× Larger single strand than the previous generation
  • 24 AWG Wire gauge
  • 26 g Weight
Cryogenic Monocrystalline Silver

Construction

Cryogenic Monocrystalline Silver

Monocrystalline silver conductors, 1.5 times larger in cross-section than the industry standard, cryogenically treated to reduce residual stress and resistance.

Unveiled Accuracy

Sound

Unveiled Accuracy

Thera is tuned for accuracy and vocal definition, removing any veil from your music, with 3D, life-like headroom and astute separation and imaging.

The Heart of the Aegean

The Heart of the Aegean

Thera, the capital town of Santorini, sits on the edge of a caldera above the Aegean Sea.

Thera MKIII uses cryogenically treated monocrystalline 7N silver, 1.5 times larger in cross-section than the previous generation, for accuracy and vocal definition with 3D, life-like headroom and astute instrument separation.

Sound Guide

How Thera MKIII rates for treble, mids, bass, bass depth, imaging, headroom and detail retrieval. Use it to match the cable to your earphones and source.

Ratings are Null Audio’s listening notes, out of 10.

  1. Treble 9.8 out of 10
  2. Mid 9.6 out of 10
  3. Bass 8.4 out of 10
  4. Bass Depth 8.2 out of 10
  5. Imaging 9.5 out of 10
  6. Headroom 9.5 out of 10
  7. Detail Retrieval 9.6 out of 10
Ready for daily carry

In the box

Ready for daily carry

  • Thera MKIII cable 1.2 m, your connector
  • Premium leather pouch For daily carry

Craft and care

Introducing FlexiPlug

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.

Build Note

Build Note

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.

Caring for Your Cable

Care

Caring for Your Cable

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.

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

Technical details

Cable
Conductor Material
UPOCC monocrystalline 7N silver
Wiring
24 AWG
Length
1.2m or 48" (Contact for customization)
Weight
~26g
Hardware
NL4 - Ocean Blue
Solder
NA Custom 10% Silver Solder
Pin contact
High precision fabrication, 24k gold plated
Compatibility
Earphone and headphone connectors
FlexiPlug (switchable 2-pin, IE300, A2DC, IPX, Pentaconn Ear, QDC 2-pin), 2-pin 0.78 mm, Flat 2-pin 0.78 mm, MMCX, A2DC, IPX, A2DC (headphones), Beyerdynamic T1 / T5p, Etymotic ER4P / ER4B / ER4S, Etymotic ER4SR / ER4XR, FitEar, Focal Utopia, Sennheiser IE 40 PRO, Sennheiser IE 8 / IE 80, Sennheiser IE 300 / IE 600 / IE 900, Sennheiser IE 500 PRO, Sennheiser HD 59X, Sennheiser HD 600 / HD 650, Sennheiser HD 700, Sennheiser HD 800, JH Audio (with bass control), Mini XLR 3-pin, Mini XLR 4-pin, Sony IER-Z1R, Shure SRH1540 / SRH1840, Sony MDR-EX1000, Sony XBA-A / XBA-Z series, UE / UM / QDC legacy 2-pin, Ultimate Ears TripleFi 10
Player plugs
2.5 mm balanced, 3.5 mm, 3.5 mm right-angle, 4.4 mm balanced, 3.5 mm balanced, 3-pin XLR (pair), 4-pin XLR, Lightning DAC, USB-C DAC (Realtek ALC5686), USB-C DAC (ESS ES9280C)
Service
Warranty
1 year
Returns
Standard builds: 14 days from delivery, unused and in original packaging; 30% restocking fee, shipping not refunded. Custom spec, length or connector builds: no change-of-mind returns once production starts. Defects are covered by the warranty.
Made in
Singapore, built to order

Find the right connector for your earphones

Customer reviews

Rated 4.8 out of 5 from 67 reviews.

  • 5 out of 5 · Paul N. · 2025-10-27

    ASH 7 drivers Hybrid In-Ear-Monitor

    I have to say ASH 7 drivers Hybrid IEM is brilliant! The custom molding done in house and fitment of the IEM is very good. Quality of the IEM is top notch. Sound quality is fantastic if (I should say a MUST upgrade not IF) you upgrade your cables to the Thera MKIII UP-OCC Cryo Silver Headphone/IEM Cable. ASH 7 drivers Hybrid comes with the copper cable which I personally think makes the IEM sound muddier and lack the high end frequancy. Simply put it... it doesn't sound as clean and clear with the copper cable. I have no regrets whatsoever to go for the upgrade right from the start. It was the best thing ever! With the MKIII the IEM immediately sounded very different! The sound stage is very impressive with the MKIII Cryo silver cable. Everything was clearer, cleaner and articulate making listening to the music a total joy! As for using it as my IEM for drumming... It works perfectly and exactly what I wanted for a IEM. It is a must to get the Premium Interconnect Cable for customization if you wish to listen music with your phone! Listening to Spotify and Youtube music will never be the same anymore!!! Pure joy to travel with it!!

  • 5 out of 5 · Weng C.P. · 2024-04-25

    Symphonym - Thera MKIII

    The service and response from Null Audio was very prompt attending to my product queries. This had enabled me to place the order for the Thera cable. Delivery was also very fast. I enjoyed the Thera sliver pairing with the Hifiman HE1000. The highs and timbre are airy, coupled with a good mid texture. Bass is well controlled with right amount of slams. This is a good cable punching above its price.

  • 5 out of 5 · Jun L. · 2023-06-05

    Great upgrade cable

    I was looking for slightly brighter sounding cable for my 64 Audio custom IEM, and this is the perfect one. Great feels, great design, amazing build. It’s already my 3 cable from Null Audio, I’ve been extremely happy

  • 5 out of 5 · Richard H. · 2022-01-21

    Superb!

    I listen to HD jazz & classical music using a Luxury & Precision P6 Pro DAP with Cosmic Ears CE6P IEMs. I purchased the AAW Thera MKII UP-OCC Cryo Silver IEM cable as an upgrade of a cable from a major manufacturer that costs about half the price of the AAW Thera. I’ve been listening for about 25 hours so the cable is most likely not burnt in fully. I’m extremely pleased with my purchase. As other reviewers have pointed out these cables are a stunning work of art, manufactured to the highest standards. I opted for the herringbone 8 braided configuration and although they are heavier than a conventional cable I’ve found them to be perfectly comfortable listening to music when seated. The sound is supremely better than my original cables. The sound stage is wide and holographic with excellent separation of individual instruments in pieces ranging from orchestral music to small jazz groups. In a cacophony of orchestral percussion and brass a single wind instrument resolves with absolute precision and detail. I suspected that the Null audio cable would release greater depth, clarity, precision and detail from my music collection given the quality of the DAP and IEMs and I am not disappointed. They are superb to the extent that I have to listen to my entire music collection again and am constantly astonished to hear detail and nuances that I had not been aware of before. Thank you Null Audio.

  • 5 out of 5 · act J. · 2021-12-30

    great !!!!!

    I use the dap with nw-wm1a and iem with ue live. Anyway, the localization and separation of the sound is great.

  • 5 out of 5 · Lawrence H. · 2021-12-16

    AAW Thera MKII - Amazing Build Quality, Incredible Sound

    I’ve never believed that cables make any difference in sound. I have several cables in the past, all of which different quality in copper and to me, it sounded the same. I wanted to try whether or not silver makes any difference. I ended up here at Null Audio, ordered the Thera MKII and added the herringbone upgrade. As soon as it came in, I connected it straight to my Empire Ears Legend EVO IEM. For those that don’t know about this IEM, it is a hybrid configuration with a Bone Conduction driver, two dynamic drivers and 5 balanced armatures. This IEM is a BASS CANNON, which slightly recesses the treble. I love the performance but always wished that there was a bit more bite to the treble frequencies. I’ve noticed with this cable, the soundstage is much wider now along with adding a bit of sparkle on the top end. Just enough to make this my endgame. It also smooths out the bass which for some songs can be too much. The build quality and materials of this cable rivals cables that cost twice to three times more than it. I’m very happy that I came across Null Audio and purchased this cable. You will not regret your purchase here. If you’re looking for a little more sparkle in your top end and a wider soundstage, please consider purchasing the AAW Thera. It is a bit heavier due to the herringbone upgrade, so if you want a lighter cable, don’t opt for that upgrade.

Questions

Good to know

How long until it ships?

Every Thera MKIII is built to order by hand in Singapore. Lead time is around 1 week.

Will it fit my earphones?

Choose your connector when you order. 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.

Find the right connector for your earphones

Can I get a different length?

Yes. Contact us or WhatsApp +65-8731-5476 for custom builds.

What is the return policy?

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.

Read the full return policy