Now available is the new very compact yet roomy barrel for all your DIY purposes. A very small size yet is able to fit plenty of wire in the barrel, this plug is perfect for not only ciem (4 and 8-wire) cables but also
smaller full-size cables (23awg and smaller). Compatible with all your 2.5mm 4-pole accepting DAPs and devices such as A&K as well as Onkyo. A very versatile 2.5mm offering. Sold per individual connector.
For Astell & Kern, Onkyo, and more
Featuring a perfect size and shape for compact headphone cables & adapters. The 2.5mm connector must be a perfect fit for the exacting specifications of each portable media player, while allowing an easy installation of a variety of headphone, interconnect, and in-ear-monitor cables. We have a streamlined 6.8mm barrel diameter that will fit very compact jack layouts, but a 5.6mm rear opening will fit the majority of cables. The flush front face allows dimensional stability when mated with the music player, preventing jack stress. The revised 17mm barrel length is quite short to reduce strain on source components while offering ample strain relief.
Ideal installation conditions. The solder contacts inside the plug are thoroughly insulated and properly spaced to allow effortless cable installation. While all 4-contact plugs require extra attention to install, there is ample room inside the barrel so that your cable can be soldered with less difficulty than before. This design has been prototyped and tested over an extended period to ensure it goes the distance. The barrel is treated to ensure its interior is nonconductive, and the plug avoids the use of magnetically charged materials wherever possible.
The best metallurgy for each design. A high-conductivity, high strength combination of gold and brass is employed for this connector. Superior plating thickness and complete plating of all plug surfaces set this connector apart.
Unique barrel aesthetics. The Eidolic 2.5mm balanced plug for Astell & Kern is incredibly light and compact due to the choice of materials, which also confer a near-indestructible exterior. The anodized aluminum shell is textured with a proprietary process that yields a tough, matte finish that sparkles in the light. A striking white Eidolic logo is screened and heat-cured onto the upper area of the barrel. The barrel is impervious to everyday wear & tear.
Please watch the above animation if you prefer a quick visual overview.
IACS (International Annealed Copper Standard)
The IACS rating is the metric used to describe a metals conductivity as compared to the standard of copper.
First take a look below at pure metals conductivity ratings.
(1) OCC Pure Silver - 107%
(2) OCC Copper - 103%
(3) Copper (common grade) - 100%
(4) Gold - 73%
Silver is the best there is, in pure form, period.
If you take a 1"x 1"x 1" cube of pure silver and compare its conductivity to an identical 1"x 1"x 1" cube of gold, the gold is considered 32-35% less conductive than the pure silver.
An alloy, by definition, is less pure than the original pure metals it is comprised of. Alloys are in existence largely for strength / hardness properties and are not meant for high end audio cables. When you alloy a metal, say gold with silver, you quickly decrease its purity and IACS rating. Even at just 1% gold alloyed with silver the IACS rating drops down well below plumbing grade copper. Alloys in the audio world came about purely as competition increased and there was desperation for new ways to try and market a cable to the uneducated masses.
Norne Audio will always utilize the purest form of a metal and will always use pure silver occ litz, pure copper occ litz, spc occ litz or mixes thereof. Our goal is the design that possesses the absolute top specifications of the highest possible quality.