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About the Reference CD9
The Audio Research Reference CD9 is a premium top-loading CD player and DAC featuring the Philips CD Pro2 transport, quad 24-bit DACs in dual-mono configuration with dual master oscillators, and a vacuum-tube analog output stage derived from the Reference 5 preamp. It includes four 6H30 dual-triode tubes for the analog section and vacuum-tube power supply regulation with a 6550WE and 6H30. The SE version adds updated cosmetics, v3.0 USB card, and minor production changes. Digital inputs support up to 24-bit/192kHz PCM (no DSD); outputs include balanced XLR and single-ended RCA analog, plus AES/EBU and BNC digital outs. Renowned for its musicality, transparency, and natural sound.
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