NAD T 743 owner manual CHANNEL-BALANCE Test Setup, Using AN SPL Meter, Setting Channel Balance

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ABOUT THE ON-SCREEN DISPLAYS (OSD) AND FRONT-PANEL READOUT

CHANNEL-BALANCE (TEST) SETUP

Adjusting the relative balance of your system's loudspeakers ensures that surround-sound recordings, whether music or film, will present the balance of effects, music, and dialog that the artists intended. Additionally, if your system incorporates a subwoofer it establishes a correct relationship between the volume of the subwoofer and the other speakers, and thus of low-frequencies (bass) to other sonic elements.

USING AN SPL METER

It is quite practical to perform the T 743 Level setup routines "by ear," and careful work will produce acceptably accurate results. However, the use of an inexpensive sound-pressure level (SPL) meter, such as Radio Shack part number 33-2050, makes this task easier, more accurate and more repeatable. Ownership of such a meter could prove a valuable audio tool; your NAD audio specialist may be able to help you with temporary use of a meter.

The SPL meter should be placed at the primary listening position, at approximately the height of the seated listener's head. A tripod is helpful, but with a little duct tape almost anything — a pole lamp, music-stand, or ladder-backed chair, for example — can do as well. Just be sure that no large acoustically reflective surfaces obstruct or are near the microphone element. Orient the meter with its microphone (usually at one end) pointing straight up toward the ceiling (not forward toward the speakers) and ensure that its "C" weighting scale is selected. Set the meter to display 75 dB SPL. (On Radio Shack meters this necessitates either setting the meter to its 80 dB range and taking your readings at the -5 point, or selecting the 70 dB range and reading at the +5 point.)

SETTING CHANNEL BALANCE

Press the HTR 2 remote’s [Test] key, activating the T 743’s channel-balancing test signal and displaying the <Channel Levels> menu on the OSD. You will hear a "surf" sound that cycles through your speakers, beginning with the left-front. (If you do not hear the test signal, check your speaker connections (above), and your <Speaker settings> OSD menu settings, (above.)

As the test signal cycles around the speakers, the OSD (and the VFL front panel display) will highlight the currently playing channel. Now use the remote's [ / ] keys to adjust the loudness of the noise output from the currently playing channel to the required level (it’s usually simplest to begin with the left-front). The "level offset" reading on the right will change by 1 dB increments; ±12 dB adjustment is available.

NOTE: If you are balancing levels "by ear", choose one speaker—usually the center—as a reference and adjust each of the others in turn to "sound as loud" as the reference. Be sure that you remain in the primary listening position while balancing all channels.

Using the remote's [ / ] and [ / ] keys adjust each speaker to produce the same SPL meter reading (or subjective loudness). Note that:

•All speakers must be in their final locations before level-setting.

•Your subwoofer (if any) should be set with its integral crossover defeated, or if undefeatable, set to its highest-possible frequency if you are using the T 743's SUBWOOFER output. Final subwoofer-level adjustment “by-ear,” using music and film sound material, is frequently useful.

•Due to the effects of room acoustics, matched-pair speakers (front; surround; back) will not always calibrate to exactly the same level offset readings.

SPEAKER DISTANCE

Your system's speaker distance settings are a subtle but important refinement of your setup. Informing the

T743 of the loudspeaker-to-listener dimensions of each speaker automatically imposes the correct delays, optimizing imaging, intelligibility, and surround-sound ambience. Enter your dimensions with precision within about 1 foot (30 cm).

SETTING SPEAKER DISTANCE

From the OSD’s main <Setup> menu, select the <Speaker Distance> item using the remote's [ / ] and [Enter] keys. Using the [ / ] keys, set <Front> and <Center:> to the distance measuring from your principal listening position to the front surface of the front and center loudspeakers. Using the same remote keys, set <Surround> to the distance of the nearest surround-channel speaker.

NOTE: Distance can be displayed as feet or meters selectable by the <DISTANCE> item in the Speaker

Distance menu.

ADVANCED OPTIONS

The T 743 allows for setting of special listening and system options. These are usually one-time options settings and once set do not need to be changed.

BACKGROUND to “ON” or “OFF”

When “ON” is selected, on-screen menus will appear against a black background, obscuring the current video program (if any), when “OFF” is selected menus will appear in white text superimposed upon the current video program (if any).

TEMP OSD

TEMP OSD. When “ON” is selected, the temporary OSD such as volume, and speaker levels are displayed.

When “OFF” no temporary OSD will be displayed.

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Contents English Explanation of Graphical Symbols Safety InformationPrecautions InstallationMaintenance Electric PowerDamage Requiring Service Do not Attempt to Service the Unit Yourself OWNER’S RecordTable of Contents Getting the Most from the NAD T Troubleshooting SpecificationsConnecting AM Antenna Unpacking and SetupWHAT’S in the BOX Choosing a LocationR.S. and Digital Surround About the TEase of USE IntegrationUpgradability About the HTR 2 System Remote ControlPlay a DVD Movie QuickstartSearch Front PanelDigital Input Jack Default Assignment +12V Trigger IN/OUT Rear PanelRear Panel Dealing with HUM and Noise Setting UP the TGetting Started Input Settings Input SetupAbout the ON-SCREEN Displays OSD and FRONT-PANEL Readout Display the OSDSpeaker Settings Speaker SetupListening Mode Front L/R CenterUsing AN SPL Meter CHANNEL-BALANCE Test SetupSetting Channel Balance Setting Speaker DistanceRecalling Presets Creating and Using PresetsCreating Presets Using the T Setting Radio Presets Tuning StationsSelecting Radio Presets Choosing the FM Mute / ModeDolby PRO Logic Dolby DigitalDolby PRO Logic II Surround Dolby PRO Logic II MovieEars About the T 743S Listening ModesDTS Displaying the Signal ModeSelecting Listening Modes Adjusting Listening Modes Adjusting Channel Levels on the FLY Surround Sound Channel ChartTo Adjust Channel Levels Adjusting the Tone ControlsSpecifications Using the HTR 2 Remote ControlControlling the T Learning Codes from Other RemotesMacro Commands Copy a Command from Another KEYPUNCH-THROUGH Recording MacrosFactory Reset KEY-ILLUMINATION TimeoutDelete Mode Loading CODE-LIBRARIESAssigning the Trigger Output Trigger SetupSummary of HTR 2 Modes Condition Possible Causes Possible Solutionss TroubleshootingPhysical Specifications SpecificationsAV Surround Sound Receiver Amplifier SectionNAD

T 743 specifications

The NAD T 743 is an esteemed model in the realm of home theater receivers, reflecting the brand's commitment to delivering high-quality audio performance and versatile features designed to enhance the home entertainment experience. This receiver is particularly noted for its ability to bridge the gap between two-channel audio and multi-channel surround sound, making it an attractive option for audiophiles and movie enthusiasts alike.

At the heart of the NAD T 743 is its powerful amplifier section, which is capable of delivering robust sound with clarity and precision. The receiver boasts a total output of 80 watts per channel into 8 ohms, allowing it to easily drive a range of speaker configurations while maintaining a dynamic and engaging sound. The use of NAD's proprietary PowerDrive technology ensures that the receiver can deliver high peak power without sacrificing performance or dynamic range, which is vital for both music and film playback.

One standout feature of the T 743 is its support for various audio formats, including Dolby Digital and DTS, enabling users to immerse themselves in a lifelike surround sound experience. This receiver also facilitates easy integration with other audio and video components, thanks to its multiple inputs and outputs, including optical and coaxial digital inputs, component video inputs, and a range of analog connections. Additionally, the T 743 features a robust built-in AM/FM tuner, providing access to a wide variety of radio stations.

NAD’s engineering excellence is evident in the T 743's user-friendly interface, which includes an intuitive remote control and on-screen display. This makes it accessible for users of all experience levels to navigate through settings and customize their audio experience. Furthermore, the receiver incorporates a discrete circuit design, which helps reduce noise and enhances sonic purity.

Among its technological innovations, the NAD T 743 utilizes advanced digital signal processing, allowing for the fine-tuning of audio parameters and the creation of customized listening profiles. This flexibility is complemented by its ability to decode high-resolution audio formats, ensuring that music lovers can enjoy the full benefits of their digital collections.

In summary, the NAD T 743 is a versatile and powerful home theater receiver that excels in delivering an immersive audio experience. Its combination of robust amplification, support for various audio formats, and user-friendly design makes it an attractive choice for anyone looking to elevate their home entertainment system. With NAD's longstanding reputation for quality and performance, the T 743 stands as a solid candidate for modern audio and video setups.
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