For decades, NAD built its reputation on affordable integrated amplifiers that delivered more power and better sound than their modest specifications suggested. But the hi-fi landscape has changed. Today’s listeners want the familiar simplicity of a traditional stereo amplifier without sacrificing streaming, television connectivity, or the flexibility to build a modern 2.1-channel system.
The challenge is delivering all of that without turning a straightforward piece of hi-fi equipment into another complicated computer with speaker terminals. NAD believes its new C 359S Class A/B Integrated Amplifier ($1,299) offers a solution.
It’s an interesting move from a Canadian manufacturer that has invested heavily in Class D amplification across its Classic and Masters Series. But NAD never completely abandoned Class A/B. The excellent C 316BEE V2, remains a reminder of what the company does so well. Earlier models such as the C 326BEE and C 356BEE also helped establish NAD’s reputation for delivering serious amplification without the extravagant prices or unnecessary complexity that sometimes accompany high-end audio.
The C 359S isn’t simply a nostalgic return to those earlier designs. NAD has re-engineered its Class A/B amplification approach using power supply technology derived from its more advanced Class D platform, while incorporating the connectivity and functionality expected from a modern integrated amplifier. The result is a design that attempts to bridge two generations of hi-fi without forcing buyers to choose between old-school simplicity and modern convenience.
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Core Features
The NAD C 359S incorporates a two-channel Class AB amplifier rated to deliver 70 watts of continuous power per channel into 8 ohms or 120 watts per channel into 4 ohms, supported by a high-current, low-noise switch-mode power supply. In addition to its two amplified channels, the C 359S provides a subwoofer preamplifier output for connecting an external powered subwoofer of the user’s choice.
As an integrated amplifier, the C 359S offers a selection of physical connections, including analog and optical digital inputs, a dedicated phono input for turntables, and HDMI eARC for accessing audio from compatible televisions. The amplifier also incorporates BluOS, providing access to a wide range of streaming services and wireless multiroom audio capabilities that extend its functionality beyond a conventional two-channel system.
Bluetooth with aptX HD provides another wireless listening option, while a dedicated headphone output accommodates private listening. Additional technical details are included in the specifications chart below.
The C 359S also offers flexible control options, including easy-to-use front-panel buttons, large rotary knobs, and a supplied infrared remote. Ethernet connectivity allows the amplifier to be integrated into compatible custom control systems, providing additional flexibility for more sophisticated installations.
NAD C 359S Specifications
| NAD Model | C 359S |
| Product Type | Integrated Amplifier with BluOS |
| Price | $1,299 USD $1,599 CAD |
| Amplifier Class | A/B |
| Number of Amplified Channels | 2 |
| Preamplifier Section | Preamplifier Section |
| Line In, Sub-Out (Analog bypass on) | THD (20 Hz – 20 kHz) <0.005 % at 4V out Signal-to-Noise Ratio >90 dB (IHF; A-weighted, 500 mV out, unity gain) Input impedance (R and C) 28 kohms + 360 pF Maximum input signal >3.7 Vrms (0.1 % THD) Output impedance: 440 ohms Input sensitivity: 160 mV (500 mV out, Volume maximum) Frequency response 20 Hz – 20 kHz (±0.3 dB) Maximum output voltage >5 V (0.1 % THD) |
| Line In, Headphone Out | THD (20 Hz – 20 kHz) <0.005 % at 1V out Signal-to-Noise Ratio >110 dB (32 ohms load; A-weighted, 1V out, unity gain) Frequency response 20 Hz – 20 kHz (±0.3 dB) Channel Separation >60 dB at 1kHz Output Impedance: 5 ohms |
| Amplifier Specification | Amplifier Specification |
| Line In, Speaker Out | Rated output power into 8 ohms 70 W (20 Hz-80 kHz at rated THD, both channels driven) Rated output power into 4 ohms 120 W (20 Hz-80 kHz at rated THD, both channels driven) THD (20 Hz – 20 kHz) <0.03 % (250 mW to 120 W, 4 ohms) THD (20 Hz – 20 kHz) <0.03 % (250 mW to 70 W, 8 ohms) Signal-to-Noise Ratio >90 dB (A-weighted, 500 mV input, 1 W out 8 ohms) Clipping power >130 W (1 kHz 0.3 % THD, 4 ohms) >75 W (1 kHz 0.3 % THD, 8 ohms) IHF dynamic power 8 ohms: 76 W, 4 ohms: 144 W, 2 ohms: 210 W Peak output current >20 A (1 ohm, 1 ms) Damping factor >210 (20 Hz to 1 kHz, 8 ohms) >120 (10kHz, 8 ohms) Frequency response 20 Hz – 20 kHz (±0.3 dB) Channel separation >75 dB (1 kHz), >70 dB (10 kHz) Input sensitivity (70 W in 8 ohms) 510 mV Power consumption, standby mode 0.5 W Maximum transmit power 7 dBm ± 2 dBm |
| Phono Input, Speaker Out | THD (20 Hz – 20 kHz) <0.05 % at 70 W out 8 ohms Signal-to-Noise Ratio >82 dB (10 mV in; A-weighted, 1 W out) Input impedance (R and C): 46 kohms/100 pF Input sensitivity 3.95mV (60W out 1kHz, 8 ohms, volume maximum) Frequency response 20 Hz – 20 kHz (±0.3 dB Note: The RIAA response is consistent with a pre-emphasis that is rolled off at 50 kHz by a second-order filter, such as used in Neumann cutting lathes. Maximum input signal at 1 kHz >63 mVrms (0.1 % THD) |
| Optical Input, Speaker Out | THD (20 Hz – 20 kHz) <0.05 % at 70 W out 8 ohms, <0.05 % at 120 W out 4 ohms Signal-to-Noise Ratio >90 dB (-13 dBFS in, A-weighted 1 W out) Input sensitivity (70 W, 8 ohms) -12 dBFS Sample rate 44.1 kHz – 192 kHz Channel separation >75 dB (1 kHz), >70 dB (10 kHz) Frequency response 20 Hz – 20 kHz (±0.3 dB) |
| BluOS Section Specifications | BluOS Section Specifications |
| Audio | Supported audio file formats – MP3, AAC, WMA, OGG, WMA-L, ALAC, OPUS Supported high- resolution audio file formats – FLAC, MQA, WAV, AIFF Sampling Rate Up to 192 kHz Bit depth 16 – 24 |
| Connectivity | Network connectivity Gigabit Ethernet RJ45 Wi-Fi 5 Bluetooth Connectivity: Receive mode – ver 5.0 with aptX HD |
| User Interface | Microsoft Windows 10 or higher and macOS 10.3 or higher Free BluOS Controller App available for download from the respective App stores of iOS devices, Android devices, Windows or macOS desktops |
| Supported Streaming Services | Amazon Music, Bugs, Custom Channels, Deezer, IDAGIO, KKBOX, Napster, Neil Young Archives, nugs.net, Pando ra, Presto Music, Qobuz, QPlay, Qsic, SOUNDMACHINE, Spotify, TIDAL, Tunify Free internet Radio – Radio, Calm Radio, iHeartRadio, LiveOne, Radio Para dise, SiriusXM, TuneIn, Double Star (Subject to change without notice). |
| Integration Partners | Control4, Crestron, ELAN, Lutron, Push, Roon, RTI, URC, Double Star (Subject to chance without notice). |
| Voice Control Integration | Skills and support for Amazon Alexa and Apple’s Siri with corresponding enabled devices and App, Double Star (Subject to chance without notice). |
| Dimensions (WHD) | 435 x 100 x 400 mm (17.25 x 4 x 15.25 inches) |
| Weight | 8.9 kg (19.6 lbs) |
The Bottom Line
The NAD C 359S represents a thoughtful evolution of the company’s traditional integrated amplifier, combining familiar Class AB amplification with a modern switching power supply derived from its Masters Series technology. What makes it particularly interesting isn’t its 70 watts per channel, but how NAD has integrated BluOS streaming, HDMI eARC, and practical subwoofer management without abandoning the straightforward operation that made its earlier amplifiers so appealing.
It’s a sensible combination of established engineering and contemporary functionality, without turning a stereo amplifier into another complicated piece of connected hardware.
For owners of older NAD amplifiers such as the C 316BEE V2, C 326BEE, or C 356BEE, the C 359S offers a compelling upgrade path, particularly for listeners who still enjoy CDs and vinyl but want high-resolution streaming and better integration with their television. The optional high-pass filter also makes it especially attractive for smaller loudspeakers paired with a subwoofer, where proper bass management can make a meaningful difference.
Whether its revised amplifier architecture delivers an audible improvement over those earlier models remains to be established through listening, but NAD has made a convincing case for keeping the traditional integrated amplifier relevant in 2026. Not everyone wants to replace a perfectly good stereo system with a collection of wireless speakers and another subscription.
Pricing & Availability
The NAD C 359S Integrated Amplifier is available from Authorized NAD dealers at $1299 USD in the U.S. and $1599 CAD in Canada.
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