User manual NAD T 747 TECHNICAL SPECIFICATIONS

[. . . ] ® Owner's Manual AV Surround Sound Receiver T 747 SVENSKA NEDERLANDS DEUTSCH ITALIANO ESPAÑOL FRANÇAIS ENGLISH IMPORTANT SAFETY INSTRUCTIONS ENGLISH FRANÇAIS ESPAÑOL ITALIANO DEUTSCH NEDERLANDS SVENSKA 1 2 3 4 5 6 7 8 9 10 11 12 13 14 THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THE PRESENCE OF UNINSULATED "DANGEROUS VOLTAGE" WITHIN THE PRODUCT'S ENCLOSURE THAT MAYBE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK TO PERSONS. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE APPLIANCE. NOTE TO CATV SYSTEM INSTALLER This reminder is provided to call the CATV system installer's attention to Section 820-40 of the NEC which provides guidelines for proper grounding and, in particular, specifies that the cable ground shall be connected to the grounding system of the building, as close to the point of cable entry as practical. WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. Do not defeat the safety purpose of the polarized or grounding type plug. [. . . ] · SpeakerLevelandSize: T 747 crossover is set based on each channel's signal handling capability and the subwoofer crossover is automatically set. SPL (Sound Pressure Level) of each speaker is matched with respect to the microphone position. · Equalization: Adjust tonal quality (bass/treble level) for each speaker. This is a one-time set up, unless speakers are moved or changed, in which case the calibration should be performed again. NOTES · Autocalibrationispossibleonlyfora7. 1or5. 1speakerconfiguration. For other speaker configurations, like a 2. 1 setup, you have to manually set them up by referring to the guidelines below for Speaker Configuration, Speaker Distance and Speaker Levels. · Thetesttoneemittedduringmeasurementisloud. Thismaybe bothersome for you and may affect as well your other household members and even your neighbor. ABOUT EQUALIzATION Equalization is one of the parameters automatically adjusted when the Auto Calibration feature is initiated. If after Auto Calibration, the resulting equalization effect does not suit your taste or preference, you have the option to turn off such equalization effect. Equalization cannot be turned ON or OFF if auto calibration is not performed and completed. 2 Using the AVR 3 remote control and with Device Selector set to AMP page, direct the AVR 3 to the T 747's remote sensor. 3 Press and hold AVR 3's TEST button until the upper line of the VFD shows "Adjusting EQ" and the lower line "OFF"; equalization is now turned OFF. 4 If you decide to turn ON again the calibrated equalization effect, press and hold AVR 3's TEST button until the upper line of the VFD shows "Adjusting EQ" and the lower line "ON"; equalization is now turned back ON. AUTO CALIBRATION It has been shown that many, if not most, surround sound systems are not accurately setup and calibrated. To be done properly, calibration requires special knowledge and instrumentation that the average person probably doesn't possess. The Auto Calibration featured in T 747 uses a microphone, along with sophisticated digital electronics built into your T 747, to automatically setup and calibrate the T 747 to the exact speakers and speaker placement of your own unique Home Theatre. MEASUREMENT IS THE FIRST STEP Connect the microphone jack into the front panel's MP/MIC input. Place the supplied microphone in the listening position at about the same height as your listening ears. The microphone has a threaded insert at its base that makes possible for it to be mounted on a tripod. The sound at your main listening position is setup using the supplied microphone. Depending upon the availability of speakers, you can select either 7. 1 or 5. 1 setup. Upon selection of either 7. 1 or 5. 1, the auto calibration starts ­ refer to the OSD as auto calibration steps through each measurement parameter. A special test tone is sent to each speaker and the data is memorized by the T 747. The duration of setup may take some time depending on the number of speakers. [. . . ] · Source component not configured for multichannel digital output. · IR transmitter window on remote or IR A/V Receiver window on T 747 is obstructed. · T 747 front panel is in very bright sunlight or ambient light. · Check IR windows and ensure clear line-ofsight from remote to T 747. [. . . ]