Naim Audio NSC 222

The NSC 222 is a preamplifier with streaming playback functionality, part of the New Classic range from Naim Audio, launched to mark the brand’s 50th anniversary. It brings together digital and analog functions in a single chassis. Its design departs from the brand’s previous aesthetic codes. The device uses an internal architecture where the choice and layout of components and circuits aim to preserve audio signal integrity, in line with principles established by founder Julian Vereker.

Mechanical construction in the service of electromagnetic isolation

The NSC 222’s chassis uses solid aluminum according to a philosophy established in Naim’s early years. The side panels integrate full-height finned heatsinks that ensure passive thermal dissipation while forming a shield against external electromagnetic interference. This construction, unusually thick for this price category, also yields substantial mass (11 kg) that helps damp parasitic vibrations.

The front panel sports a characteristic triptych design, with a central polished acrylic section flanked by satin-finished aluminum. The volume knob, positioned on the left, is the dominating visual element: its generous diameter and white illuminated ring (with adjustable intensity) mark a break from the traditional green Naim logo, sparking passionate debate among brand purists.

The 5.5-inch color TFT screen occupies the center of the fascia, displaying album artwork, playback information, and configuration settings with remarkable definition. Its adjustable brightness and excellent readability at a distance make it a particularly effective interaction tool. Four capacitive buttons provide direct access to essential functions: standby, play/pause, input selection, and favorites.

Electronic architecture: the pursuit of a pure signal

At the heart of the NSC 222 is a preamplification topology developed specifically for this new generation. Volume control abandons the traditional potentiometer in favor of a sophisticated system derived from the Statement, Naim’s reference preamp/power amp sold for over 200,000 euros. This device combines a high-precision optical encoder mounted on ball bearings with a relay-switched resistor network using Reed relays.

This architecture enables level adjustment in 100 steps of 1 dB, with channel matching accuracy better than 0.1 dB across the entire range. The Reed relays, hermetically sealed in an inert atmosphere, guarantee millions of operations without contact degradation, eliminating the crackle and wear issues inherent to mechanical potentiometers.

The amplification stage uses asymmetric transistors biased in pure Class A, a configuration maintained up to the first watts of output before a progressive transition to Class AB. The coupling capacitors, soldered by hand one by one, are polystyrene, a material chosen for its exceptional dielectric properties and temporal stability. This obsessive attention to detail extends to the internal wiring, where each conductor length has been optimized to minimize parasitic inductance.

The linear power supply is built around a high-power toroidal transformer, encapsulated in a damping resin to eliminate mechanical vibration. Six discrete regulators (DR - Discrete Regulator technology) deliver perfectly stabilized voltages to the various sections, with a mains noise rejection exceeding 100 dB. This architecture allows the NSC 222 to maintain its performance even in the face of severe disturbances on the domestic power grid.

Analog connectivity: preserving the vinyl heritage

The integrated phono input reflects the attention paid to traditional analog sources. Calibrated for moving magnet (MM) cartridges, it presents an input impedance of 47 kΩ with a capacitance of 470 pF, standard values that ensure compatibility with the majority of cartridges on the market. The 40 dB gain and 23 dB overload margin (75 mV maximum) accommodate cartridges with varying sensitivities without risk of saturation.

The RIAA curve, a critical element of any phono preamplifier, achieves ±0.1 dB accuracy across the entire audio band, a remarkable performance that ensures faithful reproduction of the recorded content. The 80 dB signal-to-noise ratio, measured A-weighted, places this phono section on par with entry-level standalone phono preamps.

Line inputs include a conventional RCA pair and an 8-pin DIN, the latter maintaining compatibility with Naim’s legacy ecosystem while offering ±18 V power for compatible external preamplifiers. This functionality, unique at this price point, allows direct powering of certain high-end Naim phono stages without resorting to a separate power supply.

Streaming and digital conversion: state-of-the-art made accessible

The NP800 streaming platform represents the culmination of two decades of Naim’s experience in audio networking. Compatible with a plethora of protocols—UPnP, Spotify Connect, Tidal Connect, Qobuz, Apple AirPlay 2, Google Chromecast, Roon Ready—it offers rare flexibility of use. Support for high-resolution formats up to 32-bit/384 kHz PCM and DSD128 places the NSC 222 among the highest-performing streamers on the market.

Texas Instruments’ PCM1791A DAC, chosen after exhaustive comparative listening sessions, operates in external filter mode. This configuration allows Naim to implement its proprietary oversampling DSP filter, running at 705.6 kHz or 768 kHz depending on the signal’s native sampling rate. This computationally intensive approach preserves phase relationships and minimizes conversion artifacts.

The four S/PDIF digital inputs (two TOSLINK optical up to 96 kHz, one RCA coaxial and one BNC up to 192 kHz) benefit from a DSP buffer that eliminates jitter inherent to this transmission protocol. Two quartz master clocks—one for multiples of 44.1 kHz, the other for multiples of 48 kHz—ensure optimal temporal precision regardless of source format.

Headphone amplification: an integrated audiophile module

Far from being a token feature, the NSC 222’s headphone output fully inherits the technology developed for the Uniti Atom Headphone Edition, a specialist device lauded by critics. The dedicated amplifier, built around discrete components, delivers up to 1.5 W into 16 ohms, substantial power that can drive even the most demanding headphones in terms of dynamics and control.

The circuit operates in pure Class A at low levels, transitioning progressively to Class AB as current demand increases. This adaptive topology optimizes both sound quality and energy efficiency. The 6.35 mm front-panel jack benefits from a sophisticated protection circuit that safeguards both the headphones and the amplifier in case of improper handling.

Outputs and scalability: future-proofing the system

The preamplified outputs mark a major evolution in Naim’s philosophy. In addition to the traditional RCAs, XLRs are now provided, a pseudo-balanced (impedance balanced) configuration that delivers the noise-rejection benefits of a balanced link without the complexity and additional gain of a full differential circuit. This approach, developed specifically for the New Classic range, optimizes signal transmission to the power amplifier while maintaining broad compatibility with third-party electronics.

The maximum output level of 7 Vrms provides comfortable headroom to drive any power amplifier, including those requiring a high input voltage to reach their rated power. The output impedance, kept constant across the entire volume range thanks to the switched-resistor network, guarantees predictable behavior regardless of the load presented by the downstream amplifier.

Scalability is a fundamental aspect of the NSC 222’s design. Two Burndy connectors on the rear panel allow the addition of the NPX 300 external power supply, a substantial upgrade that disables the internal supply and physically separates the analog and digital sections. This modular architecture, a Naim signature for four decades, enables progressive system upgrades without rendering the initial hardware obsolete.

Control and ergonomics: simplicity and sophistication

The Focal & Naim app (the French group Focal acquired Naim in 2011) is a significant advance over previous generations. Smooth, stable, and intuitive, it offers complete control of the NSC 222 from iOS or Android. Navigation through local libraries or streaming services is exceptionally responsive, with high-resolution artwork appearing instantly.

The supplied bidirectional Zigbee remote provides an elegant alternative to touch control. Using a radio protocol rather than infrared, it requires no line of sight and displays the volume level on its own screen, synchronized in real time with the device. This attention to everyday usage details illustrates Naim’s maturity in user interface design.

The automation system enables seamless integration with other Naim components, notably the new-generation NAP 250. A dedicated optical link synchronizes power on/off and even logo illumination between devices. The multiroom function, compatible with up to six Naim streamers, transforms the NSC 222 into the central hub of a sophisticated distributed audio system.

Technical specifications

Analog connectivity

• Phono MM input: 47 kΩ / 470 pF, sensitivity 5 mV, overload margin 23 dB, maximum 75 mV
• 8-pin DIN input: compatible with 5-pin DIN, ± 18 V power supply for compatible external preamplifiers
• Stereo RCA pair input
• Balanced XLR pair output: maximum 7 Vrms
• RCA pair output: maximum 7 Vrms
• 6.35 mm jack headphone output: 1.5 W into 16 Ω

Digital connectivity

• USB: 2 Type A ports, front and rear, 1.6 A
• S/PDIF digital inputs:
  • 2 TOSLINK optical inputs, up to 24 bit / 96 kHz
  • 1 RCA coaxial input, up to 24 bit / 192 kHz, DoP 64 Fs
  • 1 BNC coaxial input, up to 24 bit / 192 kHz, DoP 64 Fs

Supported audio formats

• WAV: up to 32 bit / 384 kHz
• FLAC, AIFF: up to 24 bit / 384 kHz
• ALAC (Apple Lossless): up to 24 bit / 384 kHz
• MP3, AAC, MPEG-4: up to 48 kHz, 320 kbit/s, 16 bit
• OGG, WMA: up to 48 kHz, 16 bit
• DSD: 64 and 128 Fs

Audio performance

• Gain:
  • Preamplifier: 15.5 dB
  • Phono MM: 40 dB
• Frequency response:
  • MM: -3 dB at 10 Hz, RIAA ± 0.1 dB
  • Line: 3 Hz – 40 kHz, -3 dB
  • Digital: 3 Hz – 27 kHz, -3 dB
• Signal-to-noise ratio:
  • MM: 80 dB
  • Line: 104 dB
  • Digital: 102 dB
• Total harmonic distortion:
  • Line: 0.0025% at 1 kHz
  • Digital: 0.0035% at 1 kHz
• Crosstalk: 90 dB at 1 kHz

Network connectivity and streaming

• Ethernet 10 / 100 Mbit/s
• Wi-Fi 802.11 b/g/n/ac with integrated antennas, patent GB2524815B
• Bluetooth aptX
• Streaming platforms: Spotify Connect, Apple Music, TIDAL, Qobuz, AirPlay 2, Chromecast, Roon Ready, UPnP

Features and control

• Focal and Naim app for iOS and Android
• Bidirectional ZigBee RF remote control
• Direct front-panel controls: standby, play / pause, input selection, favorites
• 3.5 mm optical output for synchronized control with NAP 250
• Voice control via Apple Siri and Google Assistant, via AirPlay 2 / Chromecast

Power supply

• 2 internal power supplies: high-quality linear power supply and 0.5 W standby power supply
• Power consumption:
  • Deep standby: < 0.5 W
  • Network standby: < 2 W
  • Operation: 25 W
• Mains voltage: 115 V or 230 V, 50 / 60 Hz

Physical characteristics

• Height: 9.15 cm
• Width: 43.2 cm
• Depth: 31.75 cm
• Weight: 11 kg

Options and upgradeability

• Compatible with NPX 300 external power supply via dual Burndy connection, digital and analog
• Multiroom compatible with Naim networked products

Included accessories

• Power-Line Lite power cable