Sep 25, 2015 · His younger brother, Zheng Xi, is in charge of a team that creates Line Magnetic's Silver and Gold lines of more affordable audiophile products, including the LM-518IA ($4450), a single-ended-triode, line-level integrated amplifier, based on the 845 triode tube. The LM-518IA has been at the heart of my reference system for more than a year.
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