Free Audio Service Manuals - Free download Nad M 55 Brochure

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LUXURIOUS DESIGN The design brief reads: The industrial design must create a physical presence that is powerful, dynamic, and solid, yet reﬁ ned and elegant. We wanted a design that will still look fresh and new a decade from now, a design with classic proportions and understated details. Intelligent use of aluminum extrusions, zinc castings, and heavy gauge steel results in a chassis that is as rugged as it is handsome. Innovative use of specialized coatings and plating results in a product that will retain its good looks for many, many years to come. Since the high-density data recorded on DVD must be read with absolute accuracy, vibrations from outside or from internal sources, such as the power supply, will adversely affect sound and picture quality. A variety of special measures have been incorporated in the NAD M55 to suppress these unwanted vibrations, from the carefully engineered heavy gauge steel chassis, to the vibration isolating silicon rubber foot design. AUDIO PERFORMANCE Separate signal paths for the DVD and SACD audio maintain the highest possible levels of DVD, CD and SACD sound quality. Digital audio outputs are available in both coaxial, and optical (TosLink) SPDIF formats, as well as digital format via the HDMI output. DVD-Audio uses the Dolby licensed MLP lossless compression to produce PCM formatted high resolution signals with 24 bits and up to 192kHz sample rates. MLP perfectly shrinks the very high data rates of DVD-Audio -� up to 13.8 Mbps -� to the DVD limit of 9.6 Mbps without losing any data. This compares with data rates of approximately 1.5 Mbps for CD, and as little as 0.03 Mbps for MP3 encoded audio. Dolby Digital and Dolby ProLogic decoding is also included, as is support for MP3 and Windows Media Audio. The NAD M55 uses professional grade 24-bit, 192-kHz audio D/A converters. These premium devices are well protected from noise caused by even minute ﬂ uctuations in current from the power supply. The level of quantization noise within the frequency range is uniform for all frequencies and very well suppressed. This D/A converter ensures that all the sound you hear is as clear and noise-free as possible. High speed FET output devices keep all the detail present in high resolution SACD and DVD-Audio formats, perfectly intact. Digital Bass Management is available for all surround sound formats. This prevents bass frequencies from overloading and distorting your speakers by redirecting them to your subwoofer which is specially designed to handle the lowest octaves. When playing DVD-Video, DVD-Audio or Super Audio CD sources, it is possible to preset speaker conﬁ gurations. The crossover point is selectable with 12 dB high and 24 dB low pass ﬁ lter slopes. VIDEO PERFORMANCE The M55 features a Dual Discrete Video Circuit (D.D.V.C.) for the highest possible picture quality via the Component Video output. An extremely high-speed video D/A converter is a very critical component in generating a superior quality video playback from DVD. The NAD M55, therefore, uses the highest quality 10-bit, 27MHz individual video DACs for Composite and S-Video and 12-bit, 148MHz individual video DACs for Component output. Independent video DACs allow simultaneous feed to zone 2. These ensure highly accurate playback of delicate, low-level video signals. This produces a vivid picture that is faithful in every detail. Over sampling of 4x is achieved for Progressive and 8x for interlaced video signals, allowing more detailed D/A conversion. Higher quality picture reproduction is also possible thanks to a ﬁ lter with ﬂ exible shutout characteristics that is used for the analog ﬁ lter in the latter stage. Furthermore, the NAD M55 uses two separate video D/A converters to process Progressive and Interlaced signals. This eliminates mutual interference between the Progressive and Interlaced signals and allows both an Standard Deﬁ nition and a High Deﬁ nition picture to be output simultaneously -� a great feature for sending video to a second viewing zone (available on the M15 Preamp Processor). Progressive Scan features the DCDi processor by Faroudja. Progressive Scan technology represents a vast improvement over the interlaced scanning method used in normal TV broadcasts and other conven¬tional applications, as it can process around twice as much video data to produce a sharper, noise-free picture with ﬁ ner details. Video images are faithfully displayed with optimum naturalness and beauty. A wealth of picture quality adjustment functions, including Contrast, Brightness, Hue, Sharpness, Black Level and Gamma, can all be adjusted using the intuitive On Screen Display.

Nad M 55 Brochure

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