SKU: 54114111126

Effect Audio CODE 23 MK II / MK 2 Earphone Cables

Sale price$283.50 Regular price$315.00
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Ships within 48 hours · Estimated delivery Jul 22 - Jul 27

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Description

Effect Audio CODE 23 MK II / MK 2 Earphone CablesCODE 23 MK II is the Horizon Series statement of Copper in its purest form. Built entirely from UP OCC Pure Copper Litz, it preserves the conductors natural character without compromisedelivering weight, density, and a low end foundation that is both powerful and solid. The MK II evolution introduces three precise improvements: over 20% more conductive material for stronger signal delivery and dynamic headroom, a 10% reduction in overall diameter for

CODE 23 MK II is the Horizon Series statement of Copper in its purest form. Built entirely from UP-OCC Pure Copper Litz, it preserves the conductor’s natural character without compromise—delivering weight, density, and a low-end foundation that is both powerful and solid.

The MK II evolution introduces three precise improvements: over 20% more conductive material for stronger signal delivery and dynamic headroom, a 10% reduction in overall diameter for improved ergonomics, and the Quad-FlexPro™ Solid Core system, which enhances frequency control and stability across the spectrum. Together, these refinements push performance further while retaining structural integrity.

CODE 23 MK II stands as the definitive expression of copper—focused, authoritative, and unmatched in its ability to project music with scale and presence.

 

Sound Profile:-

CODE 23 MK II delivers immense bass power, bold dynamics, and physical presence. A sound that hits with subwoofer-like impact while retaining balance and control. The low end is deep and commanding, anchoring the music with scale and authority.

The result is EFFECT AUDIO's most powerful expression of copper in the Horizon Series, crafted for the purest Copper fans.

What is Improved in MK II:-

1. 20% More Conductive Material
By increasing the strand count by 20%, CODE 23 MK II expands its conductive surface area , improving current uniformity and minimizing micro-resistance across the bundle. This refined geometry enhances transient accuracy and current delivery, translating engineering precision into audible control. Expect stronger yet tighter bass definition, cleaner high-frequency extension, and an effortless sense of dynamic coherence. The natural outcome of copper optimized to its physical limits.

2. 10% Reduction in Diameter
Despite the material increase, the cable is now slimmer thanks to the sleeve optimization. It keeps the same AWG size while improving overall flexibility and reducing bulk.

3. Quad-FlexPro™ Solid Core System
At the heart of CODE 23 MK II lies the third-generation Quad-FlexPro™ Solid Core System—an evolution of 2024’s Trio-Flex™ architecture and our pioneering 2023 Solid Core design. The central conductor now features four individually calibrated solid cores, each precisely tuned for its frequency role:

- One thick core for the lows, enabling superior current delivery and sub-bass authority
- One medium core for the mids, preserving tonal density and coherence.
- Two finer cores for the highs, refining transient speed and micro-detail retrieval.

This deliberately over-engineered solid-core architecture balances current flow and electromagnetic behavior, minimizing interference and mechanical stress across the frequency spectrum. Every structural choice is made to push copper to its physical limits, achieving greater harmonic stability, lower distortion, and exceptional phase alignment. This showcases copper’s natural warmth, revealed with unprecedented precision and control.

Quad-FlexPro™ embodies three years of solid-core evolution, representing Effect Audio’s relentless pursuit of perfection at its most precise, most powerful form.

Hardware Design:-

The Y-split of the CODE 23 MK II embodies a forward-looking vision of engineering. Machined from lightweight aluminium and finished in a soft metallic gold, its compact modular form takes cues from aerospace-grade connector housings and propulsion couplings.

Its dual-layer construction, defined by clean lines, chamfered edges, and geometric precision, mirrors the discipline of aerospace design. This is not a design built on ornamentation, but one that achieves elegance through structure, symmetry, and purpose: a visual expression of the same EFFECT AUDIO engineering philosophy that drives the cable within.


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 54114111126

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4.8 ★★★★★
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Laura W.
Pawtucket, US
★★★★★ 5
Female with no knowledge about cars seal of approval!
Size: For Mazda 3 14-18 2.0L/2.5L|Mazda 6 14-21 2.5L
Perfect for my 2016 Mazda3. I am a young female with zero tools and zero knowledge about cars. My dealer was asking over $60 to change these out, and after a 5-minute course at YouTube University, I was able to do everything myself in under 15 minutes. It’s my crowning achievement of 2026. I recommend gloves when you go to change out the engine and make sure it’s wiped out and cleaned before you put the new one in! But other than that, it’s honestly just popping a few things out, changing the filters, and then popping them back into place. They look almost identical to the filters that were already in there. There was no wrestling with making them fit because they just slid easily into place. Great buy and unbeatable price if you have a few minutes to spare to do it yourself!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
C
Verified Purchase
Cyberbard
Houston, US
★★★★★ 5
Easy Install - Looks like the Original
Size: For Ascent 19-26|Crosstrek 2.0L 18-22/2.5L 21-22
Both of these filters, cabin and engine are really easy to install at home with NO tools needed and at a fraction of the price that dealers charge. These filters are for a Subaru Impreza and look almost identical to the originals and fit perfectly. Cabin filter installation is by dropping the glove box - detach damper rod and unclip sides. Unclip filter cover behind glove box and remove/replace filter checking airflow direction is the same as the old filter. Reinsert glove box and push up to locate side clips. Re-affix damper rod and you're done. Engine filter is equally easy. Unclip air filter housing (not necessary to remove entirely) slide out old filter and insert new on in same orientation. Re-attach clips and done. Took me 10 minutes to change both filters. Longest part was emptying all the cr*p out of my glove box. Good quality filter, easy to install and saves time and money. I bought a second set for a Mazda CX-5 non turbo and quality was the same. Installation exactly the same as above for the Subaru
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Reviewed in the United States on February 5, 2026
D
Verified Purchase
dannyww
Natrona Heights, US
★★★★★ 5
Worked fine
Size: For Palisade 2020-2026
Great fit and value. Installation was easy.
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Reviewed in the United States on May 20, 2026
P
Verified Purchase
PH
Lowell, US
★★★★★ 5
Good Filter
Size: For Durango 11-26|Grand Cherokee 11-22 etc.
Fit as it should and works as it should. Good value.
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Reviewed in the United States on April 28, 2026
B
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Brett D. Crowell
Carnegie, US
★★★★★ 5
Never Pay Again. Easy and affordable for your health and the vehicle.
Size: For Sonata Gas 2015-2019
Way easier to replace than I thought. I’ve done a cabin filter before, but never the engine air filter. After this, I’ll never pay someone to do it again. I actually went into a store first, and the cabin filter alone was the same price as this set that includes both the cabin and engine filters. Since I needed both, this was a no-brainer. Install was quick and straightforward, even for someone who’s not a "car guy". I can’t speak scientifically on how well they filter, but they’re definitely better than the mouse-destroyed ones that were in this car before. Huge improvement. Highly recommend if you’re looking to save money and do it yourself. They fit well and seemed to be exactly what was needed and expected.
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Reviewed in the United States on April 15, 2026

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