The protagonist MIRO this time is ERUA's mid-level wire, using the factory's improved Litz type 6 core structure to match the single crystal copper silver-plated core material. MIRO is slightly different from the common Litz type 6 line in terms of processing. It not only shows the factory's pursuit of product details, but also reflects their unique insights into materials and sound.
The copper conductive silver wire on the market, due to the difference in the conductivity of copper and silver, or the poor quality of the substrate itself, has partial or complete frequency band connection problems, with obvious intermediate frequency depression and imbalance. The ratio of high to low. As a result, the factory decided to ignore the principle of non-stop proofing and trial production, and finally let them find a way to strengthen the advantages of copper silver-plated wire and solve the shortcomings of the frequency band: the second compression and annealing process that takes longer to produce.
The substrate of MIRO is single crystal copper, which has small impurities and good conductivity. It is the best choice to ensure the neutrality and fineness of the tone. Even so, in fact, the substrate still has a chance to produce an extended grain boundary section during the stretching process, which greatly reduces the conductivity. Therefore, in addition to the normal stretching, annealing, and electroplating treatments of MIRO, ERUA also adds a recompression process to it, and extends the cooling time in a specially selected coolant, thereby eliminating most of the grain boundary cross-sections in the conductor. , Make the structure more compact, so that the finished product has better conductivity.
During the development of MIRO, the factory tried to compare the finished cores after secondary compression and single compression. Under the same configuration, the MIRO with the secondary compression process has a higher sound density, a more solid image, and a clearer and more mellow tone. In the end, under the subjective test of everyone, it became the standard processing technology of MIRO wire. However, the secondary compression means that the conductor processing time is doubled, the process is more complicated, and more wires need to be discarded; when the general wire factory charges the material value and the finished wire base length as the charging standard, the overall cost is more difficult Control, so this is a relatively rare treatment on portable audio cables.
After using the above process, the factory tried to plate the MIRO trial works with different proportions of silver materials. Among them, there were also combinations made by matching different solders by the factory; the trial works calculated by the kilometer and the length of one With the matching of the model and the solder in the previous year, the sound combination was finally formally confirmed at the end of the previous year. The finished product greatly reduces the conductive influence of the two materials, and with the addition of the unique shock-absorbing material of the Litz type 6 structure, the expandable space under the working state of the conductor is increased, so that the sound of the wire is connected, dynamic, and extended. They are all excellent, and the vibrant sound highlights the unique advantages of copper-plated silver wire.
In terms of tuning, MIRO’s sound is balanced, and the three-frequency texture and details are improved; the tone is freely retractable, the sense of power is stronger, and the dynamic performance is significantly enhanced.