Description The NAD C 658 is a BluOS streaming DAC and digital preamplifier that serves as the intelligent heart of a modern hi fi system. It brings together a high resolution network streamer, an ESS Sabre converter and a fully digital preamplifier, all managed through the intuitive BluOS app for multiroom playback and access to the major streaming services. Connectivity is generous, with moving magnet phono, line, optical and coaxial inputs alongside Gigabit Ethernet, dual band Wi Fi and two way aptX HD Bluetooth. Balanced and single ended preamp outputs, a subwoofer output and a headphone stage round out the analog side, while a pair of MDC expansion slots keep the platform ready for future upgrades. A standout feature is the included Dirac Live room correction with calibration microphone, which tailors the sound to the listening space for cleaner bass and sharper imaging. The result is a versatile, upgradeable source that keeps a system current for years to come. Buyer’s Guide Plain-English Guide: what every feature does Audiophile Deep Dive: the engineering explained Specs Type BluOS streaming DAC and digital preamplifier DAC ESS Sabre 32-bit; native playback to 24-bit/192kHz Formats MQA, FLAC, WAV, AIFF, ALAC, MP3, AAC, WMA, OGG, OPUS; DSD via BluOS app conversion Inputs MM phono, 2 line RCA, 2 coaxial S/PDIF, 2 optical; Gigabit Ethernet, dual-band Wi-Fi, aptX HD Bluetooth (two-way), dual MDC expansion slots Outputs Balanced XLR and single-ended RCA preamp outputs, stereo subwoofer output, headphone output Streaming BluOS multiroom with Spotify, Tidal, Amazon Music, Qobuz, Deezer and more; Dirac Live room correction included Dimensions 435 x 100 x 405 mm (W x H x D) Weight 10.1 kg (22.3 lb) WarrantySold as an authorized NAD dealer by All Elite Audio. New NAD C658 units include the full NAD manufacturer warranty of 2 years for the original owner. Contact us with any setup or service questions. What's in the Box C 658 streaming DAC Remote control Dirac Live calibration microphone Wi-Fi antennas Power cord Quick setup guide
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