NAD C 658 BluOS Streaming DAC

The NAD C 658 BluOS Streaming DAC redefines what a Classic Series component can be, combining a high-performance network streamer, precision DAC, and digital preamplifier in one flexible platform. With BluOS built in, the C 658 provides seamless access to major streaming services and local music libraries through the BluOS Controller app. Its all-digital architecture delivers clean, detailed playback from every source, while Dirac Live calibration—upgradeable to Full Frequency—optimises performance for any room. Built for long-term flexibility, the award-winning C 658 remains a trusted hub for modern two-channel systems.

Includes Dirac Live® Limited Bandwidth licence and calibration microphone for room correction up to 500Hz

Key Features

• BluOS built in for high-resolution streaming and multi-room audio
• High-performance DAC stage for clean, detailed playback
• Includes Dirac Live® Limited Bandwidth licence and calibration microphone for room correction up to 500Hz, with licence upgradeable to Full Frequency
• Fully digital preamplifier architecture with low-noise signal path
• Balanced and single-ended outputs for flexible system integration
• Adjustable digital subwoofer crossover with bass management
• MM phono input plus line-level and digital inputs for legacy sources
• Dual MDC slots for optional future expansion, including HDMI and USB-DSD playback functionality
• Two-way aptX HD Bluetooth for wireless listening
• Gigabit Ethernet, dual-band Wi-Fi, and comprehensive control options
• Supports Dirac Live® Bass Control with optional licence purchase for advanced subwoofer optimisation

High-Resolution Streaming with BluOS

Equipped with BluOS, the C 658 provides seamless access to major streaming services, local music libraries, and high-resolution playback throughout the home. The BluOS Controller app makes it easy to browse and control music in one room or across a multi-room system. Designed for clarity and ease of use, BluOS gives the C 658 intuitive, app-based navigation that brings modern convenience to serious hi-fi listening.

Flexible Connectivity for Modern Hi-Fi

Designed to integrate effortlessly into high-end audio systems, the C 658 offers a wide range of analogue, digital, balanced, and subwoofer connections. Its digital-domain signal handling, adjustable bass management, and balanced outputs make it a precise, low-noise partner for any power amplifier. Whether pairing with external sources, turntables, or multi-room components, the C 658 unlocks the full performance of your existing system.

Precision Digital Processing

The C 658 maintains an all-digital signal path to preserve detail and consistency across all inputs. A high-performance DAC stage and digital-domain volume control minimise noise while maintaining transparency at any listening level. This careful design ensures clean, balanced playback from high-resolution streaming to traditional sources.

Dirac Live Room Calibration

As a Dirac Live component, the C 658 can be calibrated to your listening space using the included licence, with the option to upgrade to Dirac Live Full Frequency for more advanced tuning. Dirac reduces room-induced resonances and improves imaging by correcting both time and frequency response. This optimisation brings greater clarity, depth, and focus, allowing your speakers to perform at their best.