These units are in like-new condition. Please note: we do not have the original boxes, so local pickup only please. Bring home a complete, high-performance two-channel system with this pre-owned NAD C 658 BluOS Streaming DAC paired with the NAD C 298 stereo power amplifier — offered together at a special combo price. This pairing gives you everything you need to stream, control, and power a serious hi-fi setup from a single, cohesive system. The C 658 acts as your network streamer, DAC, and digital preamplifier all in one. With BluOS built in, you get seamless access to major streaming services and your local music library through the BluOS Controller app, plus Dirac Live room correction to tune the sound to your space. It offers a full set of connections — MM phono input, line-level and digital inputs, balanced and single-ended outputs, an adjustable subwoofer crossover, two-way aptX HD Bluetooth, Gigabit Ethernet, and dual-band Wi-Fi — along with dual MDC slots for future expansion. The C 298 is the ideal partner for it, built around NAD's Eigentakt amplifier technology for clean, powerful, low-distortion output. It's a flexible amp with balanced and single-ended inputs, a bridge switch for mono-block operation, and auto-sense power for easy integration into automated systems.