NAD T743 - User Manual

•5 x 50W Simultaneous Minimum Continuous Power
into 4 / 8 ohms
•105W, 145W, 165W IHF Dynamic Power into 8, 4
and 2 ohms, respectively
•Dolby Digital, DTS, ProLogic II, EARS and
Enhanced Stereo
•5 A/V Custom Presets store unique speaker level and
tone control settings
•Direct access speaker level adjustment for surround,
center and subwoofer
• Stereo Bypass
•NAD Soft Clipping ™
•6 A/V Inputs, 3 with S-Video, 2 Full Tape Loops
• Component Video, 2 Inputs and 1 Output, HDTV
Compatible
•2 Audio Inputs, 1 Tape Output
•6 Digital Inputs, 4 Coaxial, 2 TOS Link
freely assignable
•5.1 Analogue Input (for DVD-Audio)
•Speaker A + B switching (Speakers B stereo only)
•2 x IR Outputs, IR Input
•2 x 12V Trigger Outputs, 12V Trigger Input
•Preamp Outputs for all 5.1 channels (2 Subwoofers)
•Ampli er Input for 3 ampli er channels
•RDS FM/AM Tuner with 30 direct access presets
•HTR-2 - 8 Device Illuminated Learning Remote with
Macro function
The NAD T 743 is heir to many generations of award
winning NAD designs. This exceptional pedigree is
evident in both the look and the feel of the T 743, and
it is unmistakable the moment you listen. Based on the
highly successful T 742, the T 743 boasts improvements
in virtually every area of the receiver, for a cumulative
effect that is fully deserving of the new model number.
Starting with a revised heat management system that
reduces internal operating temperatures even under the
most severe operating conditions, the T 743 includes a
new volume control circuit and input switching circuit that
further reduces noise and distortion. In addition, we have
increased the number of digital inputs and added speaker
switching for a second pair of stereo speakers. Also new
are the On-Screen Display, HDTV Component Video
Switching, and an illuminated learning remote, the NAD
HTR-2.
Performance
Today’s advanced surround sound receivers require
quality in both the digital decoding stages and the
analogue amplifying stages for the best overall
performance. The T 743 is an excellent example of the
NAD Design Team’s expertise in both areas.
Using the latest high speed DSP technology, NAD
was able to include the newest surround formats from
Dolby and DTS, as well as including NAD’s own highly
regarded music surround mode, the EARS (Enhanced
Ambient Recovery Circuit) circuit. Unlike, the typical
arti cially enhanced DSP modes like “Club”, “Stadium”,
and “Church”, EARS uses DSP technology to extract the
natural ambience to create surround sound from any 2
channel source inducing a warm natural reverberant effect
without the arti cial “BOING”. Surround processing is
automatically detected via the digital inputs of the T 743,
and the “highest” or most advanced form of decoding is
switched in. Conversion of the decoded digital bitstream
T 743 A/V Receiver

Summary

Product Overview and Performance

Performance

Discusses the quality of digital decoding and analogue amplifying stages for optimal performance.

Receiver Features and Usability

Flexibility

Highlights the receiver's capability as a command center for home theatre systems with extensive connectivity.

Luxurious Simplicity

Emphasizes ease of operation, logical setup, and user-friendly features for everyday use.

Technical Specifications

Amplifier Section Specifications

Details power output, distortion, input sensitivity, impedance, and damping factor for the amplifier.

Tuner Section Specifications

Provides specifications for FM mono/stereo sensitivity, distortion, signal-to-noise ratio, and frequency response.

Video Section Specifications

Lists input/output impedance and component video bandwidth for video signal handling.

Physical Specifications

Details the unit's dimensions, net weight, and shipping weight.

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

The NAD T 743 is an A/V Receiver that builds upon a legacy of award-winning NAD designs, offering a blend of high performance and user-friendly features for home entertainment systems. It is designed to serve as the central hub for both audio and video sources, providing robust amplification and advanced surround sound processing.

Function Description:

The primary function of the NAD T 743 is to act as a multi-channel amplifier and a digital/analog audio/video processor. It decodes various surround sound formats, amplifies audio signals for multiple speakers, and switches between different audio and video sources. The receiver is engineered to deliver a potent and musical sound, capable of filling large rooms with lifelike audio levels. Its power supply design is meticulously crafted to ensure that the amplifier can meet its power specifications even when all channels are operating simultaneously, including demanding 4-ohm speaker loads.

The T 743 incorporates the latest high-speed DSP technology to support advanced surround formats from Dolby and DTS, ensuring compatibility with a wide range of movie soundtracks. Additionally, it features NAD's proprietary EARS (Enhanced Ambient Recovery Circuit) music surround mode. Unlike typical artificial DSP modes that create exaggerated effects like "Club" or "Stadium," EARS utilizes DSP to extract natural ambience from any 2-channel source, producing a warm and natural reverberant effect without artificial coloration. The receiver automatically detects surround processing via its digital inputs and switches to the most advanced form of decoding available. The conversion of the decoded digital bitstream is handled by high-resolution, linear D/A Converters, carefully selected for their performance capabilities.

For video, the T 743 offers a comprehensive suite of switching options, supporting all popular video formats including Component Video, S-Video, and Composite Video. This ensures compatibility with a variety of video sources, from DVD players to game consoles, and facilitates easy attachment for both playback and recording. The inclusion of HDTV Component Video Switching further enhances its capability to handle modern high-definition video signals.

Usage Features:

The NAD T 743 is designed for luxurious simplicity, aiming to make its extensive capabilities and flexibility accessible to all users. Initial system setup is streamlined through the use of a television monitor and a clear, simple On-Screen Display (OSD). This OSD can also be configured to provide status updates as settings are changed during everyday use. Once the system is configured, all settings are stored in non-volatile memory, making it a one-time task. The front panel display provides complete information about the current source, selected surround mode, and volume setting.

The receiver includes five independent "A/V Presets" that allow users to store unique speaker level and tone control settings. This feature enables instant recall of customized system configurations tailored for different types of program material, such as movies, music, or gaming. The T 743 also remembers the last used settings when it is switched in and out of Standby mode, ensuring a consistent user experience.

For audio flexibility, the T 743 allows for the addition of more speakers for multi-room listening. A second pair of stereo speakers can be easily connected to the front channel amplifiers and switched on or off via the remote control or front panel. The receiver also features 12V trigger outputs to automatically switch similarly equipped source components on and off, simplifying system integration. Discrete On and Off codes, along with direct access to inputs and FM station presets, further facilitate integration into elaborate remote control systems. Preamp outputs and main amp inputs, a long-standing NAD feature, provide the option to add more powerful external amplifier channels or reconfigure existing amplifier channels, for example, by dedicating a more powerful external amplifier to the front channels.

The integrated FM/AM tuner includes 30 direct access presets for favorite stations. These presets can be custom-named, and if the station supports the Radio Data System (RDS), the tuner will automatically stream information about the station and the music being played.

The included HTR-2 remote handset is an illuminated, learning remote control capable of managing up to eight devices. Its illuminated buttons facilitate easy operation in low-light environments. The remote can be "taught" commands for products not already in its memory. A Macro function allows users to program up to eight individual commands to be triggered by pressing just two keys, automating complex sequences like those required for watching a DVD.

Maintenance Features:

The NAD T 743 incorporates several design improvements aimed at enhancing reliability and longevity. A revised heat management system is implemented to reduce internal operating temperatures, even under the most severe operating conditions. This helps to protect internal components and ensure stable performance over time.

The receiver also includes a new volume control circuit and input switching circuit, which further reduce noise and distortion. These enhancements contribute to the overall audio quality and reliability of the device. The robust power supply design, typical of NAD products, ensures that the amplifier can handle demanding loads without performance degradation, contributing to the long-term stability of the unit. The use of high-quality components, such as the carefully selected D/A converters, also points to a design philosophy focused on durability and consistent performance.

NAD T743 Specifications