Content | Mu-so 2nd Generation is the successor to the multiple award-winning Mu-so wireless music system, re-engineered for class-leading performance, functionality, and usability by Naim's experts in Salisbury, England.
Combining Naim's 45 years of hi-fi mastery with the very latest music-streaming technology and premium design quality, this is the ultimate single-box system you and your music deserve. From up to 32bit high-resolution streaming to multiroom music to HDMI TV sound; you’ve never heard it so good from an all-in-one wireless system.
The all-new multicore Digital Signal Processor (DSP) drives higher performance, providing 2000 MIPS (Million Instructions Per Second) compared to the original Mu-so’s single-core, 150MIPS DSP.
Naim has also created a new limiter algorithm that keeps each of Mu-so 2nd Generation’s speaker drivers’ movement under control when at high volume levels. The new limiter, by design; is only active at extreme volume levels, and helps to retain the music’s clarity and increase long-term reliability.
Premium aluminum casing, in a new burnished grey finish.
It may look similar outside, but inside Mu-so 2nd Generation, the majority of components have been upgraded to improve performance.
The cabinet design has been re-engineered to create 13% more internal volume, enabling bigger, better bass. Both the cabinet bracing and baffle molding have been redesigned for improved rigidity, which suppresses and controls vibrations.
The distinctive heat-sink fins are now more compact, while still being ultra-effective, and continuing to feature Naim patented technology that discreetly incorporates the Wi-Fi antenna.
Specifications
Audio Inputs
HDMI: ARC in with CEC
Streaming: Apple AirPlay 2, Chromecast Built-in, UPnP, Spotify® Connect, TIDAL, Roon Ready, Bluetooth, Internet Radio
Analog input: 3.5mm Jack
USB: USB2 (Type A connector)
Digital (S/PDIF): Optical S/PDIF up to 96 kHz
Connectivity
Multiroom: Sync up to five Naim streaming products and control via the Naim App
Network: Ethernet (10/100Mbps), Wi-Fi (802.11a/b/g/n/ac), BLE v4.2
Formats
Internet radio formats: Windows Media-formatted content, MP3, ACC, Ogg Vorbis streams and MMS
Internet radio provider: vTuner Premium 5*
Audio formats
WAV, FLAC and AIFF – up to 24bit/384kHz
ALAC (Apple Lossless) – up to 24bit/384kHz
MP3 – up to 48kHz, 320kbit (16 bit)
AAC – up to 48kHz, 320kbit (16bit)
OGG and WMA – up to 48kHz (16bit)
DSD- 64 and 128Fs
Bluetooth - SBC, AAC
Note: Gapless playback supported on all formats
Warranty: Two years
Physical
Finishes: Burnished and anodized aluminum casework, CNC milled, bead blasted and anodized aluminum heatsinks, dual-tone grey and black fabric grill or light wood veneer and beige fabric grill.
Weight: 24.69 lb
Dimensions (HWD): 4.8" x 24.7" x 10.4"
Amplifier output: 450 W – (6 x 75 W)
Power Consumption
Typical use: 17 W
Standby mode: < 2 W
Deep sleep (No-network standby mode): < 0.5 W
Speaker system: Stereo 3-way; DSP-optimised vented box acoustic system
Supplied with: Dual-tone grey and black grill, remote control, power cord, reset pin-hole tool and information booklets |
Easily integrate Hi-Res Audio, network streaming, and music control BluOS App in your C 390DD
Direct Digital DAC Amplifier or Masters M12 Digital Preamp DAC. Featuring BluOS, the music management software developed by NAD’s sister brand, Bluesound, the DD-BluOS module is a complete digital music solution at an amazingly affordable price. Thanks to the forward-looking innovation of Modular Design Construction, you can now add BluOS network and internet music streaming with advanced music management to your NAD C 390DD or M12.
As an internal module there are no external wires or power supplies required and integration with the C 390DD or M12 operating firmware is hand-in-glove. Both Ethernet and Wi-Fi operate in asynchronous mode for lowest jitter performance and allow connection to music stored anywhere on the local network or streamed directly from the Internet using a popular music services like Spotify Connect, Rdio, and Slacker. You can also play music from a USB drive or hard drive via the USB A port.
In addition to a standard Local Area Network, BluOS requires an iOS or Android smartphone or tablet (NAD offers free iOS and Android Apps) to control and manage your music. While the expected functions of Play/Pause/Skip are present, BluOS also brings all of your music together integrating locally stored music (like iTunes) and music streaming services. BluOS does not rely on middleware like UPnP/DLNA/AirPlay with their inherent limitations, but instead creates direct shares with music in all formats including FLAC, ALAC and WAV with data rates up to 24/192. Playlists can be created and managed right inside the BluOS App. Gapless playback is supported and the DD-BluOS is fully compatible with Bluesound High-Res Wireless Multi-room Players to form integrated whole-house systems. Includes an external USB WiFi module to optimize signal strength.
| Rupert Neve Designs' Shelford Channel, over a half century in the making, is the definitive evolution of Mr. Neve's renowned 80 Series channel module technology, updated and refined for the contemporary studio. The Shelford Channel is fitted with Rupert's latest Class A transformer-gain mic preamp, the best-of-the-classics Inductor EQ from the Shelford 5052, a punchy diode-bridge compressor, the alluring analog textures of variable Silk saturation, a state-of-the-art dual-tap transformer output stage with massive headroom, and double the operating voltage of vintage designs. Offering rich tonal options for making audacious statements with your music, along with precision-detented controls for recall, the Shelford Channel delivers the authoritative sonic essence of classic Rupert Neve designs, along with modern versatility.
Input stage and transformer-gain mic pre
Rupert Neve's first new Class A, transformer-gain mic preamplifier in over 40 years makes its debut in the Shelford Channel. Rupert has spec'd this preamp with a direct-coupled transformer input; gain is provided by the custom transformer itself. The proprietary input transformer, and its meticulous integration with the surrounding Class A input amplifiers, plays an outsized role in the Channel's immediately recognizable sonics: punchy and creamy-smooth, with excellent isolation and vanishingly low noise.
The Shelford Channel's front-panel hi-Z instrument input uses the same discrete Class A field-effect transistor with transformer topology as Rupert Neve Designs' acclaimed RNDI; for gain, however, it utilizes the new RN4012 input transformer directly into the mic preamp. This design provides astonishing clarity on hi-Z sources, with substantial low-end weight and silky-smooth high frequencies. The DI also gives you a passive thru output to feed a guitar or bass amp.

- Mic-DI/Line: switches between microphone/direct injection input and line input
- GND Lift: disconnects the audio signal ground from chassis earth
- Signal LED: green indicates Signal Present; red indicates imminent input stage clipping
- Mic Gain: 12-way precision rotary, controls gain from 0dB to 66dB in 6dB steps
- Trim: rotary switch provides further continuous gain adjustment of +/-6dB
- 48V: switch engages phantom power on the mic input
- Phase: inverts the polarity of the signal path (illuminates when engaged)
- HPF Freq: engages a 12dB/octave highpass filter, variable from 20Hz-250Hz

The best-of-the-classics inductor EQ
The Shelford Channel's EQ section is a 3-band, custom-tapped inductor circuit containing Rupert's favorite bands from his vintage equalizer designs. The low-frequency band is primarily based on the 1064 — acclaimed for its creamy, resonant bass. Unlike the 1064, though, the Channel gives you added dimension, punch, and control over your low end by letting you use the LF band as either a peaking or a shelving filter. The midrange band is based on the venerable 1073 and is perfect for sweetening instruments and vocals while nudging them forward in a mix. "Proportional Q" response also makes it ideal for attenuating problem frequencies. The high-frequency band is a hybrid design with the best of vintage and modern attributes. It should be noted that this EQ is in no way a clone; it's a decidedly modern design using components and techniques that simply did not exist in the 1970s — for instance, the use of capacitor-based topologies to achieve sonic richness and enhanced control.
- EQ In: engages all EQ frequency bands except HPF
- LF: adjusts up to 15dB of boost/cut at the selected low frequency
- Low Freq: 4-position rotary switch for selecting LF band corner or center frequency
- LF Peak: selects LF shelving (out) or peaking (in) mode
- Mid Hi Q: selects between a mid-band resonance of 2 (out) or 3.5 (in)
- Mid: adjusts up to 15dB of boost/cut at selected mid frequency
- Mid Freq: 6-position rotary switch selects center frequency of the midband EQ stage
- HF Peak: selects HF shelving (out) or peaking (in) mode
- 8K/16K: selects between an 8kHz (out) or 16kHz (in) center or corner frequency for HF band
- HF: adjusts up to 15dB of boost or cut at selected high frequency
The Super Diode-bridge Compressor
Like the Shelford Channel's inductor EQ and transformer-gain microphone preamp, the diode-bridge compressor/limiter is based on the topologies found in vintage Neve designs such as the 2254. It improves, however, on the early designs by the inclusion of full-wave rectification and a bevy of new control features. Although Rupert's vintage diode-bridge compressors were prized for their warm, punchy response, they were somewhat compromised by imprecise controls, attack-time inflexibility, low headroom, and high noise. The Shelford Channel's Super Diode-bridge Compressor delivers the attitude-packed, "in your face" sound of those classics, but with modern precision and flexibility — which makes it ideal on any source. Full Side-chain and stereo Link features are provided.
- Side Chain Insert Jacks (rear-panel): for fine tuning of compressor operation
- Comp In: engages the Channel's compressor-limiter section
- Threshold: sets level where the compressor "kicks in"
- Ratio: sets compression slope from 1.5:1 (minimal) to 8:1 (heavy)
- SC Insert: inserts rear-panel sidechain insert jacks into sidechain signal path
- HPF to S/C: routes highpass filter into the circuit that compressor uses to determine level
- Gain: for adding make-up gain to compensate for level attenuation lost to compression
- Timing: 6-position rotary adjusts attack/release speed of the compressor
- Link: links the sidechain control of multiple units for ganged or stereo operation
- Pre EQ: changes the order of compressor in the circuit chain
- Blend: mixes the dry and compressed signal for handy parallel compression
- Fast: speeds up both attack and release of the selected compressor time constant
Dual-tap transformer output
The Shelford Channel's output stage serves up the inimitable sound of Rupert Neve's classic designs while providing far more tonal versatility. The dual-tap output for the RN2042 square-core output transformer provides both high- and low-headroom outputs without compromising performance. The high-headroom tap takes advantage of the Shelford's higher-voltage design, delivering a pristine sound without non-linear output-stage coloration at high levels. The low-headroom tap, on the other hand, lets you drive the full voltage range of the Channel to accentuate this non-linear harmonic content — without clipping most pro interfaces. For vocals, drums, guitars, bass, and other instruments, this output lets you hit the transformer's sweet spot, which can inject life into a recorded performance in a way that other effects cannot.
The Silk and Texture controls
The Shelford Channel is packing a secret weapon the classics never had: its output transformer features the Silk Red/Blue and Texture controls from the Portico II Series that let you tailor the harmonic content and tonality of the output stage. By engaging these controls and sufficiently driving your output, you can dial in delectable 2nd- and 3rd-order harmonic distortion (that's the good kind) and saturation of the output transformer, imbuing your tracks with juicy rich thickness (think: 1073 on steroids) — with no danger of overloading the output stage. The Silk Red mode emphasizes harmonic content generated by the source's high frequencies; Blue mode, conversely, works off the low frequencies. The Texture knob controls the amount of added harmonic content. Disengage Silk, and your output is pristine and modern, while retaining Rupert's bigger-than-life transformer sonic signature.
The magical sound of Neve
Rupert Neve is an audio legend whose electronics designs defined the golden age of analog. Those of us at Sweetwater who have had the privilege of working on a Neve 8078 or its predecessors can attest to the fact that Neve's Series 80 consoles were indeed the pinnacle of hand-wired analog mixing desks. Mr. Neve has remained at the forefront of audio-circuit innovation for over half a century, and his current company, Rupert Neve Designs, continues to advance the state of the art with cutting-edge products that sound incredible and intelligently address the challenges of the digital age.
Rupert Neve Designs Shelford Channel Features:
- The definitive evolution of Rupert Neve's renowned 80 Series channel module technology
- A complete channel strip that delivers the essence of classic designs, along with modern versatility
- Input stage and transformer-gain mic pre
- Front-panel hi-Z direct input
- Best-of-the-classics inductor EQ
- Super Diode-bridge Compressor
- Dual-tap transformer output
- Silk and Texture controls
| With a fully discrete current feedback design, the PM8006 integrated amplifier is perfect for audiophiles who require both excellent music quality and flexible operation. The PM8006 offers a powerful 2x 70 W into 8 ohm build, while the symmetrical circuits provide optimal imaging. To ensure the most immersive musical experience, the amplifier uses new Marantz-designed electric volume control and Marantz Musical Phono EQ preamp stage, created to obtain the purest signal from beloved vinyl by minimizing noise levels. To further remove interference, new isolating feet are used to support the amplifier, combining high density and a damping fiber.
The PM8006 also includes preamp outputs along with a power amp direct input, allowing you to use the unit as a standalone power amplifier for integration into a multi-channel home theater system. For precise sound tailoring, our triple tone control system provides separate controls for the bass, midrange and treble. The elegant remote control features an ergonomic layout for easy operation, and can control accompanying source players.
Features
- Integrated Current Feedback Amplifier with 2x 70W / 8 ohm rms
- Newly designed electric volume circuit
- Exceptional Marantz Musical Phono EQ stage
- Marantz proprietary HDAM-SA3 circuits
- Triple layer bottom plate
- Gold Plated Inputs/Outputs incl. Phono (MM) input
- Double shielded Toroidal Transformer and high quality customized components
- High quality, original Marantz SPKT-1+ Speaker Terminals (A / B switchable)
Specifications
Inputs: RCA line x 5, RCA MM phono x 1, HT bypass
Phono input sensitivity: 2 mV @ 47 kOhm
Phono SNR: 87 dB
Outputs: Tape out, pre out, headphone out, speaker A and B
Power output (8 ohm / 4 ohm): 70 W / 100 W
Dimensions: 17.3" x 14.9" x 5"
Weight: 26.45 lb
| The M3si integrated amplifier produces high quality sound, has an extensive range of useful inputs and offers high reliability, compact size and a fair price. With its strong 85 watts per channel, the M3si will drive a huge variety of appropriate loudspeakers. It has inputs for phono (MM), 4 line inputs and USB ‘B’ up to 24bit 96 kHz.
The M3si’s sound is effortless, clear and sweet. It projects wide and deep images and has plenty of power to deliver excellent dynamic range.
The M3si is unconditionally stable and will drive any appropriate loudspeaker with ease.
Although it is Musical Fidelity’s lowest price amplifier, it embodies our hallmark values of uncoloured, stress-free sound, outstanding technical performance and great value for money.
M3si In Brief
- 85WPC
- Excellent technical performance
- Preamp output
- Unconditional stability, will drive any loudspeaker
- Wide range of useful inputs
- including asynchronous USB and MM phono
- Excellent build quality and convenient size
Specifications
Power output: 85 W per channel into 8 ohm
THD(+ noise): <0.014 % typical, 20 Hz to 20 kHz
Signal to Noise Ratio: >98 dB ‘A’-weighted
Frequency Response: +0, –0.1 dB, 10 Hz to 20 kHz
Inputs: 4x Line Level RCA / Phono, 1x USB type ‘B’ connector - Asynchronous data stream at up to 24-bit/96kHz, 1x MM Phono input
Phono
Sensitivity (nominal): 3 mV (suitable for cartridges giving 1.5mV or more including high output MC types)
Signal / noise ratio: >70 dB ‘A’-weighted
Input impedance: 50 k ohm
Frequency response: RIAA/IEC ±1 dB, 20 Hz to 20 kHz
Dimensions - WxHxD (mm): 440 x 100 x 400
Weight (unpacked / packed): 9.2 kg/ 13 kg | This is the product to get if digital setup is confusing or overwhelming. Just add a power amp and speakers for a fully functional streaming platform with one of the neatest most intuitive manufacturer apps out there: BluOS.
A Sabre DAC ensures detailed and musical output, and the NAD C 658 also features Dirac room correction. And yes, it'll do the "full unfold" of all MQA content.
Features
- BluOS Network Streaming with MQA Decoding
- ESS Sabre DAC
- Dirac Live Room Correction*
- Gigabit Ethernet
- Dual Band Wi-Fi ac/n
- 2-way Qualcomm aptX HD Bluetooth
- 2 x MDC Slots for Future Expansion
- MM Phono Input
- 2 x Line Inputs
- 2 x Optical Inputs
- 2 x Coax Inputs
- Balanced Preamp Output
- Preamp Output
- Stereo Subwoofer Output
- High Current Headphone Out
- USB socket for adding optional wireless output module
- IR In with Learning Function
- Trigger Out/In
Specifications
Supported audio file formats: MP3, AAC, WMA, OGG, WMA-L, ALAC, OPUS, MQA, FLAC, WAV, AIFF, Supports converted DSD playback via the BluOS desktop app (only)
Native sampling rates: Up to 32 bit/192 kHz
BluOS
Supported operating systems: Plays music from network shares on the following desktop operating systems: Microsoft Windows XP, 2000, Vista, 7, 8 to current Windows Operating Systems and Mac OS X versions
User interface mobile operating system: luOS – Free Android and iOS App available online at Google Play and Apple App store
Supported cloud services: Spotify, Amazon Music, TIDAL, Deezer, Qobuz, HDTracks, HighResAudio, Murfie, JUKE, Napster, Slacker Radio, KKBox, BugsFree internet radioTuneIn Radio, iHeartRadio, Calm Radio, Radio Paradise
Bluetooth: Bluetooth aptX HD wireless built-in, two-Way
Network connectivity: Gigabit Ethernet RJ45, WiFi 5 (802.11 ac/n)
Dimensions (WHD): 17-1/8" x 3-15/16" x 16"
Shipping weight: 22.3 lb
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