Almost the entire Esprit line is now available in the US. The company pays special attention to shielding, and uses lithium-ion batteries in its top four lines. All connectors are 14-micron silver-plated copper. Other special features include the use of long-crystal, ultra-pure copper, a silicon dielectric, and Kynar (polyvinylidene difluoride, a thermoplastic fluoropolymer) for noise isolation. If I've garbled that a bit, please chalk it up to English as a second language.
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