Cayin
Cayin RU9 - Headphone Amplifier
The Cayin RU9 is a portable headphone amplifier featuring tube or transistor amplification. Equipped with a Korg Nutube 6P1 lamp, AKM AK4493SEQ DACs, and XMOS XU316 USB processor, it offers exceptional audio quality. The RU9 supports various formats including USB PCM/DSD and SPDIF.
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Updated on May 18, 2026
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