ISN T-OCC Triple Copper Hybrid Audiophile IEM Cable

Dsnuts

Headphoneus Supremus
T-OCC triple hybrid copper cables from ISN
Pros: Good looking all brown colorway
bendable- non noodly
very minimum mircrophonics
3 copper type blends that yeilds enhancement in all regions of sound
Higher end copper properties
more resolving vs standard copper or single copper cables
choice of ear guides or no guides when ordering.
Versatile sound enhancement for your IEMs.
Cons: None thus far.
ISN T-OCC
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T-OCC is the newest creation from our friends at Penon/ISN. This one in particular is interesting for several reasons. It is using 3 types of copper based materials and while that alone is nothing exotic or new to the market. There seems to be specific reasons why they chose the materials they have for this product. The material descriptor for the cable is 3 different copper based cables with 3 different diameters. Unlike most companies that use a whole sale product to make a cable. Each element was chosen to bring a specific type of sound for these and even on open listen I can already tell the resolve of these cables are much greater than something that comes with your included cables.

The idea of making an aftermarket cable you specifically spend money on has to do with upgrading a sound profile for the IEMs you attach them to or at least that should be the idea right? So it would be a completel fail if something like the ISN T-OCC was not actually an upgrade.
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However, I can say. These will be an upgrade to most cables that come with your IEMs. I say most because I do know TOTL level IEMs sometimes come with premium grade IEM cables that adds another $1,000 or more to the end cost of an IEM and of course that manufacturer will charge accordingly.

The ISN T-OCC is a solid 2 core cable with 181 shares of the material per core. The shares of the material has a weave of 3 distinct copper cores. 2 different types of crystal copper and the last type being what seems to be a mixed copper and silver alloy material. If any of you guys have owned prior “alloy” based IEM cables like the Penon Renata or ISN CS02 you will get a good idea of the resolving ability of the T-OCC. So you can say the T-OCC is a continuation of the alloy sound design from those prior cables.
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Quality
T-OCC is a softer bendable good looking cable in all brown, no issues with microphonics or usability. Its not a noodly cable or is it so weak to cause tangling. These are excellent ergonomically for IEM use. I believe you can order these with ear guides or without. My unit I have on had does not have any ear guides. If you plan on being active with your T-OCC I recommend the ear guides to help keep the cable draped over your ears. They are soft enough to work without guides but I do notice the occasional movement will cause them to unhook over my ears. So that will be up to you. This particular chin slider you see in the below picture I have used in the past that didn't work so well but I am happy to report these actually work. Its not the best type where it clinches but it does hold in place when sliding the up the chin slider.
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Performance
The sound of the T-OCC is interesting as it seems ISN has specifically chose the 3 elements to line up with the 3 zones of sound that we hear from our IEMs. Basic metallurgy for IEM sound profiles indicate, Copper is the foundation for all things related to sound. So a natural tonal character is expected of a cable based on 3 types of copper used. We get that. The breakdown in material goes as follows 98 shares of frozen single crystal copper, 48 shares of quenched single crystal copper, and lastly 35 shares of copper-silver alloy. Just a guess on my part but it seems these 3 was chosen to enhance each part of a sound make up. Single crystal copper for bass and mids, Quenched crystal copper for mids tonal, timbral character with the copper- silver alloy for its imaging and resolving highs. Then it is finished off with Penons OFC copper material for connectors and terminations. When put together you should have the T-OCC.
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The T-OCC literally enhances every part of an IEM sound profile with an added stage and depth of sound all good upgraded cables should have. The first time I heard them. They immediately reminded me of the Penon Renata cables and to a lesser extent the ISN SC02 but somewhat different than both. I can hear the family resemblance to those cables but has a greater skew toward bass and tonality. The Renata is a more technical cable but the ISN being true to the ISN House sound profile seems to have addressed the bass foundation of their sound in the T-OCC. Its technicalities are where I thought they sounded like the Ranata and somehow is a more musical version of the ISN CS02 cable. More weighty, airy for trebles, a solid sense of slam for bass. If the deliberate use of the 3 elements that make up this cable was designed in this manner to address each part of the sound profile. Well it worked.

Testing the T-OCC yields very good sound separation, before you ask, it is not quite at the level of the Renata. These seem to enhance the bass end a touch more while the Renata is a more balanced type cable. I could have guessed they were using that copper- silver alloy material just due to their similarities for tonal enhancement, clarity and detail level. Again while not as spacious sounding as the Renata. It is close and if you didn’t have a Renata cable to compare it to. Yes I can officially say these will enhance stage, depth, and technicals: imaging, layering, sound separation, details. Enhances all 3 parts of a sound profile, trebles with a bit of extra shimmer, the mids get an upgraded sense of space and contrast. Bass gets a touch extra impact with a better sculpting ability. These don't quite reach the note weight like the ASOS or the new + model, they don’t quite reach the level of technicalities like the Rentata, they don't have the bass emphasis quite like the Penon bass cables but this could be it presenting with a more substantial mid band emphasis. On the other hand they don’t quite have the mid forwardness of the Penon Vocal cable. What they do have is a bit of the sound enhancement going on from all of these cables mentioned rolled up in one. Which is pretty astounding.
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This would be the very definition of a cable that upgrades your sound. These are expertly engineered IEM cables that do the one thing they were made for. Upgrade your sound. My basis for this impression was based on going back n forth from a standard ISN C4 cable which uses single crystal copper for its cores. If you took the ISN CS02 material and braided that with the ISN C4 cable and then used the Penon OFC copper plugs and connectors. You would get something very similar.

Adding the extra material mix for the T-OCC clearly yields an enhancement to its base crystal copper cores. Making the T-OCC perform in a much higher end capacity vs standard copper type cables. Going back n forth from these two cables there enhancement for sounds as noted prior just makes your IEMs sound more spacious, sound elements better separated but one with full dynamics. And that my friends makes up what the T-OCC is about to my ears. Yet another compelling cable offering from ISN.
Last edited:
iscorpio71
iscorpio71
Now... I'm thinking of ordering it. Thanks @Dsnuts
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