PRODUS: AV Preamplificator NAD Masters M15HD

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NAD Masters M15HD

High-End AV Surround PreamplifierManual utilizator

When the M15 was introduced in 2005 it redefined the performance and value expectations for consumers worldwide. With a string of rave reviews and awards including the prestigious EISA Award for ‘Best Home Cinema’, the M15 has become a classic in its own right. There is now a new generation of video source and display products that support high resolution video and high definition audio. The new M15 HD has been re-engineered to take full advantage of these new High Definition formats. We have also added some interesting new features to enhance your enjoyment and protect your investment.

All this processing is controlled in the M15 HD by the latest high speed DSPs, loaded with NAD’s proprietary software. These DSPs are capable of 100s of millions of operations per second! Fortunately, we use all this processing power to keep the everyday operation of the M15 HD as simple and intuitive as possible. Once the system and user preferences are set, the M15 HD operates very much like our stereo preamplifiers. Just select the desired source – audio or video – set the volume, and hang onto your hat as the M15 HD takes you deep into the essence of the music or movie you are about to experience.

The M15 HD also supports Audyssey MultEQ Pro, an exciting new room correction technology that uses actual measurements of your room to create precision digital filters to correct for the effects of room boundaries. Unlike tone controls or even multi-band equalizers, Audyssey can correct for time (phase) as well as frequency errors. And unlike previous digital room correction technologies that sounded great in the sweet spot but worse outside the sweet spot, the Audyssey system creates a wide, ‘family–sized’ sweet spot where the sound is uniformly excellent for all listeners. Audyssey MultEQ Pro must be professionally calibrated by a specially trained professional sound engineer. The result of this calibration is a complex digital filter that is stored in the M15 HD’s memory and is applied to all audio signals.

The heart of every electronic component is its power supply. Taking the raw current from the wall socket and creating stable, clean DC voltages is crucial to obtain the maximum performance of every circuit in the M15 HD. The M15 HD uses two different power supply technologies to provide performance without compromise. A very tightly regulated Switch Mode Supply provides the high current and stable voltages required by the ultra high speed video and audio processing in the new HD circuits. The audio circuits utilize a linear supply fed by a custom designed C-Core Transformer. This feeds into independent rectifiers and multi-stage regulators to obtain pure and stable voltages for each individual audio circuit. By keeping analogue and digital completely separate, any possible cross contamination is prevented.

Compatible and Upgradable - MODULAR DESIGN CONSTRUCTION: The M15 HD interfaces perfectly with the majority of consumer audio and video formats including the latest, HDMI. But we know that as digital technology evolves there will probably be different requirements in the future. To remove the ‘obsolescence factor’ we have placed all audio and video input circuitry on individual modules that can be easily upgraded in the future if desired. Additionally, the operating and decoding software can be upgraded via serial port when new features and formats become available. The M15 HD has four times the processing power of the original M15 and is using the latest ultra high speed 32-bit floating point DSPs for all decoding and post processing.

Premium parts from renowned suppliers like Burr-Brown and Texas Instruments, are used in classic NAD circuit configurations to provide the low distortion and sonic realism for which NAD is famous. With full 24-bit 192kHz analogue-to-digital and digital-to-analogue conversion, the M15 HD can fully exploit the best source material available today and for the foreseeable future. Unusually, the M15 HD uses multiple 2-channel DACs rather than the 8-channel DACs favoured by many of today’s surround sound processors. We have found that the sonic performance of the 2-channel DACs used in a dual differential mode is well worth the extra cost of this configuration.

Unprocessed analogue inputs, whether stereo or via the 7.1 input, remain in the analogue mode, sometimes known as ‘bypass’ mode. If a digital processing mode is selected, these signals are digitized using a 128x over-sampling Sigma/Delta ADC that employs a linear phase digital anti-aliasing filter to prevent any trace of ripple in the audio band. Super high-speed (8 MHz bandwidth) low distortion (0.00008% THD) amplifiers are used for analogue input and output buffers. These FET OPAmps feature high slew rate and are capable of the high output current required by this application. Low noise and superb dynamics are assured.

The M15 HD features NAD’s newly developed HDMI repeater featuring Sigma’s VXP Image Processor. Both analogue and digital video sources can be selectively processed using Sigma’s advanced VXP algorithms. This is the best performing image processing engine we could find, using custom algorithms developed for the broadcasting industry. These algorithms are embedded in one of the most advanced high speed DSPs on the market which results in class leading processing latency of less than 1/50th of a second, or about one frame of video!

The new VXP video board features video conversion to resolutions as high as 1080p and supports all SD and HD formats up to 2048 x 2048 pixels. Motion adaptive de-interlacing with edge interpolation eliminates the jagged edge effects common in lesser image processors. Film mode detection with output cadence generation endows the video picture with a film-like smoothness of motion. The programmable scaling engine also allows for aspect ratio conversion to perfectly match the video source with the video display. Advanced noise reduction and detail enhancement improve legacy analogue video sources to near HD quality. All SD analogue sources can be processed to HD output via analogue Component Video or Digital HDMI. This allows true ‘one cable’ convenience by converting all the different input source components to one HD video format to send to your TV display or projector. OSD is also available on all video formats.

- 4 Digital HD AV Inputs with HDMI Repeating
- 4 Analogue AV Inputs with Composite and S-Video
- 3 HD Component Video Inputs
- 4 Coax and 4 Optical Digital inputs
- 3 Analogue Stereo Inputs
- 7.1 Direct Analogue Input
- Dolby TrueHD, DTS HD Master Audio, Linear PCM will run at 192kHz; Dolby Digital Plus, DTS HD High Resolution Audio, DTS 96/24
- DTS Neo:6 [Cinema/Music], Dolby ProLogic IIx [Movies/Music], EARS, Enhanced Stereo
- Audyssey MultEQ Pro
- Video upconversion; Composite and S-Video inputs available on Component Video output and HDMI output
- Sigma VXP Image Processing with HD scaling to 1080p
- MP Data Port for connection to NAD Dock for iPod
- Lip sync compensation – (option to 200mS)
- Flexible Bass Management including individual crossover frequencies for Front, Centre, and Surround speakers
- Tone controls
- RS-232 interface for advanced custom installations
- 12V Triggers for advanced control options, 1 In and 3 Out
- 3.5mm IR Control jacks, 1 In and 4 Out
- Zone 2 Independent AV output
- Zone 3 and Zone 4 Independent Audio output
- Dual differential 24-bit, 192 kHz DACs
- Dynamic Headroom Scaling for optimum resolution and S/N ratio for all program and decoding combinations
- Switch Mode Power Supply for Digital Audio and Video Stages
- Linear Power Supply with Custom C-Core Transformer for Analogue Audio Stages
- Detachable AC cord
- 8 Device HTRM Illuminated Learning Remote control with LCD display
- ZR 5 Second Zone Remote