NAD T762 - User Manual

The NAD T762 is an A/V Surround Sound Receiver designed to deliver high-quality audio and video performance for home theater systems. It combines advanced digital signal processing with NAD's "Music First" design philosophy, aiming for both state-of-the-art surround sound and audiophile-quality music listening.

Function Description

The T762 functions as the central hub for an audio/video system, managing multiple input sources, processing audio signals for surround sound, and amplifying them for loudspeakers. It supports various digital and analog audio formats, including Dolby Digital, DTS, and HDCD. Key functionalities include:

Multi-channel Amplification: The receiver features six built-in power amplifier channels, delivering excellent quality for demanding home theater speaker systems. It also provides pre-amplifier outputs for all channels, allowing for expansion with external power amplifiers if desired.
Surround Sound Decoding: The T762 incorporates high-speed DSP processing with 24-bit, 192 kHz-sampling-capable D/A converters for all channels. It supports state-of-the-art surround decoding from Dolby Digital and DTS sources, including Dolby Digital EX and DTS-ES Extended Surround for 6.1/7.1-channel reproduction.
Proprietary Audio Processing: NAD's exclusive Enhanced Ambience Recovery System (EARS) is a key feature for music listening. EARS extracts natural ambient content from stereo recordings and routes it to appropriate speakers without artificial generation, aiming for a natural and spatially accurate presentation. The receiver also includes Matrix 7.1, which creates a full 6.1/7.1-channel environment from stereo and surround-encoded recordings. Dolby ProLogic II Music and DTS Neo:6 Music modes are also available for 2-channel sources.
Video Switching: The T762 manages multiple video inputs, including composite, S-Video, and component video, routing them to a connected monitor or TV. It can transcode S-Video to composite video signals, simplifying connections to a display.
Tuner Functionality: An integrated AM/FM tuner provides access to radio broadcasts, with support for RDS (Radio Data System) to display station names and radio text.
Second Zone (MultiSource) Control: The receiver offers a full second zone control, allowing for independent selection of volume, power, and inputs (both audio and video) in another room using the ZR 2 remote control.
System Integration: The T762 provides configurable DC trigger outputs and inputs, as well as IR communications links for integration with "IR-repeater" and multi-room systems. An RS-232 port allows for advanced zone control and remote operation via a Windows® compatible PC.

Usage Features

The T762 is designed for ease of use despite its sophisticated capabilities:

On-Screen Display (OSD): A simple, self-explanatory OSD system appears on the connected video monitor/TV, guiding users through setup and daily operation. This is crucial for configuring input settings, speaker settings, distances, and channel levels.
HTR 2 Universal Remote Control: The included HTR 2 remote is a full-system remote designed to be easy to use and understand. It can control up to 8 devices and is pre-programmed for the T762 and other NAD components. It also features learning capabilities to control other-brand components via infrared.
Presets: The T762's "Presets" system allows users to customize and store virtually every aspect of audio-video playback settings, including input settings, level settings, delay settings, speaker settings, and listening mode adjustments. These can be recalled with a single key-press, enabling personalized setups for different content or users.
Channel Level Adjustment "On the Fly": Users can make temporary adjustments to the relative levels of center, surround, and subwoofer outputs directly from the HTR 2 remote, which is useful for fine-tuning dialogue or bass during playback without navigating through menus.
Tone Controls: Bass and treble controls are available on the front panel, affecting the front left/right channels in all listening modes. A tone defeat function allows for comparison with unmodified sound.
Soft Clipping: NAD's proprietary Soft Clipping circuitry gently limits the output to minimize audible distortion, even if the receiver is over-driven. This can be left on at all times or defeated for critical listening to preserve optimum dynamics.
Flexible Input Assignment: Audio and digital inputs can be flexibly assigned to video inputs, and the same analog and/or digital inputs can be assigned to multiple video inputs. Digital inputs take precedence over analog inputs when an active signal is present.
Power Drive™ Amplifier Technology: This proprietary technology ensures accurate, linear reproduction regardless of the loudspeaker, providing high dynamic power for dynamic, detailed sound.

Maintenance Features

The manual provides clear guidelines for maintaining the T762 to ensure its longevity and optimal performance:

Installation Guidelines: Instructions emphasize proper ventilation (10 cm clearance from rear/top, 5 cm from sides) and placement on a flat, even surface to prevent overheating. It also advises against placing the unit near heat sources or in enclosed spaces without adequate airflow.
Power Connection Precautions: Users are advised to connect the unit only to specified power sources, avoid overloading AC outlets, and handle the AC power cord by the plug, not the cord itself. Unplugging the unit for extended periods of non-use is recommended.
Hum and Noise Prevention: The manual offers tips to prevent hum and noise, such as powering all audio components from the same AC circuit, avoiding bundling analog and AC/digital cables, and using high-quality, well-shielded audio cables with secure connections. It also suggests using a pencil-eraser or specialized contact cleaner for contacts.
Cleaning: The unit should be cleaned only as recommended in the operating instructions.
Service Information: Users are explicitly warned not to attempt servicing the unit themselves. Any damage requiring service, such as a damaged AC plug, liquid entry, exposure to rain, abnormal operation, or physical damage, should be referred to qualified service personnel.
Memory Back-up: The T762's memory back-up system stores channel level, tuner presets, and other settings for several weeks even when the unit is switched off or unplugged.
Factory Reset for Remote: The HTR 2 remote can be reset to its factory state, deleting all learned commands, copied keys, macros, and other setup information, reverting to pre-programmed library commands.

NAD T762 Specifications

General

Total Harmonic Distortion	0.08%
Input Sensitivity	200 mV
Input Impedance	47 kOhms
Speaker Impedance	4 - 8 Ohms
Type	AV Receiver
Frequency Response	20Hz - 20kHz
Video Connections	Composite, S-Video
Power Output	80 watts per channel into 8 ohms (stereo)
Inputs	6 x RCA, 2 x optical, 2 x coaxial
Dimensions	435 x 155 x 400 mm