ACROLINK 7N-DA6300IV
MEXCEL has a single goal: To master new and unprecedented territory for audio cables. Since its appearance in 2004, MEXCEL brought major innovation to the field of audio cables. Mitsubishi Cable Industries, developer of cables for the aerospace and defense industries, teamed up with audio cable specialist ACROLINK for this endeavor. Joint development by those two companies and ESOTERIC has given birth to MEXCEL cables delivering flat transmission characteristics with a wide frequency range going beyond the gigahertz frequency zone. The tremendous information volume carried by gigahertz frequency zone transmission has combined with high-purity 7N Cu (99.99999%) to unleash the potential of audio systems, transcending established concepts for analog and digital transmission cables.
Now the fourth generation of MEXCEL cables is here as the result of our quest for a ultimate musical expression. We have now reached a new milestone with products destined to spur a tide of change never before seen in the history of audio cables.
High purity stress-free 7N copper is used as raw conductor material. MEXCEL insulated strands were developed using the stress-free 7N copper for inner conductors and outer conductors and they are used for MEXCEL cables. MEXCEL is a new enameled wire developed by Mitsubishi Cable Industries, Ltd. and has a rectangular shaped cross section. In the past, it has been difficult to apply insulation film over four corners of a single wire, so round conductors have been used out of necessity. Mitsubishi, however, has developed the epoch-making MEDIS electro-deposited insulation system, which can be called an electro-plating of the insulating resin. Unlike round conductors, rectangular conductors eliminate space between wires when wound making it possible to manufacture high density, super high performance coils. Super high performance audio cables in the new ACROLINK MEXCEL series are developed jointly by the two companies making the best use of this technology. High density braided wires are used for signal conductors as well as shielded cables to realize super wide range audio cables.
This type of MEXCEL cable falls into a category called litz wires in the field of audio, the cross sections are rectangular and densely braided. The sum of the cross section areas of the strands made of rectangular wires is larger than the strands made of round wires and it suppresses high frequency response characteristic deterioration caused by the skin effect. By braiding rectangular MEXCEL insulated strands densely, the outer conductors suppress the radiation of signals to the outside. Using rectangular strands will make the surface area larger than round strands having the same cross section area, even transmission of signals throughout the cross section is possible and the skin effect is further suppressed.
The 7N-DA6300IV MEXCEL is the flagship balanced cable in the MEXCEL cable line. It has thick, twin φ2.0 mm solid MEXCEL center conductors and triple-layer shielding. (Pure silver plated 7N Cu ultra-thin flat wire braid + copper Mylar tape + thick silver-coated Cu braid) Thanks to this new construction and shielding material, the DA6300IV achieved excellent S /N ratio, further improved high frequency response, and the highest grade of audio signal interconnection capability that MEXCEL series have ever achieved.
7N-DA6300IV MEXCEL XLR
The greatest feature of MEXCEL cables is their ability to do flat transmission even in frequency bands up to the gigahertz range. MEXCEL employs conductor technology that utilizes the MEDIS electro-deposition insulation method developed by Mitsubishi Cable Industries. This revolutionary method for electroplating insulating resin achieves uniform insulation for any shape, and it can even be applied to flat wires where insulation treatment of the four corners was previously extremely difficult. Through the insulation treatment, conductor area can be maximized and the attenuation of high-frequency characteristics caused by the “skin effect” minimized.
A megahertz is ten times larger than 100 kilohertz, and a gigahertz is a further 1,000 times larger, so 1 GHz is 1 billion Hz. At the gigahertz level, extremely accurate waveform transmission without corruption to the signal waveform is possible in digital transmission. Even in analog transmission, flat frequency response can be achieved in the entire audible range.
As the main conductor, MEXCEL series cables incorporate D.U.C.C.* 7N Cu developed by Mitsubishi Cable Industries. With 99.99999% purity, controlled in a base material production process equivalent to that used for semiconductors where high-level quality assurance is demanded, total metallic impurities are kept to less than 0.1 ppm. With respect to crystalline structure deterioration caused by bending when in use, excellent transmission characteristics are maintained using special “Stressfree” processing developed by ACROLINK for self-annealing at room temperature to preserve the optimal crystalline condition.
* D.U.C.C.: Dia Ultra Crystallized Copper (D.U.C.C.) is a high-purity copper conductor material developed by Mitsubishi Cable Industries. Its crystal grains are grown to many tens of times larger than those of ordinary pure copper, and the crystalline lattice is given unified directionality. The larger the crystal grains, the smaller the crystal grain boundary (boundary between individual crystals), thus providing greater benefit in terms of sound quality.
Much attention was also paid to using connectors that bring out the excellent characteristics of MEXCEL cables. XLR connectors feature beryllium copper contact pins, and they boast stable high sound quality over the long term thanks to treatment with direct rhodium plating. The contact pins have a hollow structure, boasting about twice the surface area of ordinary pins for even greater performance.
