Pure silver – in-akustik's flagship Reference LS-2404 and 4004 AIR Pure Silver speaker cables revisit their unique air-dielectric construction with flexible spacers which also build in a lazy twist of the suspended wires. The difference here are pure silver conductors. Pricing starts at €17'600/3m/pr for the LS-2404; and €29'700/pr/3m for the LS-4004 – i.e. not for the faint of wallet or ambition.