NAD T 758 Owner's Manual

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SPEAKER SETUPAfter connecting all ancillary sources and other combinations, the SpeakerSetup menu will guide you on how to manage and setup your speakers inorder to achieve optimum sound acoustics in your listening environment.The following are the Speaker Setup Menu sections.IMPORTANT!Dirac Live and NAD Speaker IQ features are still being finalized andwill eventually be added in future firmware Internet upgrade.SPEAKER CONFIGURATIONEvery surround-sound system requires “bass-management” to direct low-frequency content from any or all channels to the speakers best able toreproduce it. For this function to operate correctly, it is important that youcorrectly identify your speakers’ capabilities. We use the terms “Small” and“Large” (and “Off”) but note that physical size may be irrelevant.• A “Small” speaker is any model, regardless of physical size, that lackssignificant deep-bass response, that is, below about 200 Hz.• A “Large” speaker is any full-range model; that is, one with deep-bassresponse• An “Off” speaker is one that is not present in your system. For example,you might not have any surround-back speakers installed; in that case,you would set the “Back” setup item to “Off”. For “Height” speakers,selecting “Off” option for “Height 1” will automatically cut off bothHeight 1 and Height 2 Audio output.The Speaker Configuration is “global”; that is, it remains in force with all inputsand in all listening modes. However, speaker settings are part of the T 758’sPreset system. Consequently, multiple speaker settings can be stored for easyrecall as different types of recordings or listening modes require.Speaker Configuration can be managed and adjusted by pressing acombination of [ S ] and then [ D/F] keys. Set “Front”, “Center” and“Surround” to “Large”, “Small” or “Off” as your subsystem’s speakers require.The “Back” speakers can either be one or two speakers. Set “Back” to either 1 or 2speakers as per availability. Set “Subwoofer” to “On” or “Off,” selecting “On” only ifyou have a subwoofer connected to the T 758’s SUBW output jack.HEIGHT 1/HEIGHT 2“Height 1” and “Height 2” AUDIO PRE-OUT can be connected to the audioinput of an external power amplifier hooked up with up to 4 Heightspeakers. Height1/Height 2 settings must be set to “On” at the “SpeakerConfiguration” menu to power up the additional Height speakers.ENHANCED BASSWhen the subwoofer is set to ON and “Front” is set to “Large”, EnhancedBass is also available. Normally, with speakers set to “Large” the subwooferis not active. The Enhanced Bass option allows full range operation ofthe speakers with the additional bass contribution of the subwoofer. Thisfeature is particularly useful when one wants to experience maximumbass output. Please note that due to acoustic cancellation effects, the bassresponse may be uneven when using this settingYou can set Subwoofer to “On” even with “Large” front speakers, in whichcase bass content from any channels set to “Small” will be routed to boththe subwoofer and to the front speakers; LFE-channel signal will pass onlyto the sub. In most subwoofer-equipped systems, setting front speakers to“Small” is usually the better option.All the speakers’ low frequency content can be directly adjusted within therange 40Hz to 200Hz.NOTEThe configurations set forth at “Speaker Setup” are carried overwhenever it is enabled during A/V Presets setting. Please see also thesection “AV Presets” for reference.SPEAKER LEVELSAdjusting the relative balance of your system’s loudspeakers ensures thatsurround-sound recordings, whether music or film, will present the balanceof effects, music, and dialog that the artists intended. Additionally, if yoursystem incorporates a subwoofer, it establishes a correct relationshipbetween the volume of the subwoofer and the other speakers, and thus oflow-frequencies (bass) to other sonic elements.USING AN SPL METERIt is quite practical to perform the T 758 level setup routines “by ear,” andcareful work will produce acceptably accurate results. However, the useof an inexpensive sound-pressure level (SPL) meter, such as Radio Shackpart number 33-2050, makes this task easier, more accurate and morerepeatable. Ownership of such a meter could prove a valuable audio tool.The SPL meter should be placed at the primary listening position, atapproximately the height of the seated listener’s head. A tripod is helpfulbut with a little duct tape almost anything - a pole lamp, music-stand, orladder-backed chair, for example - can do as well. Just be sure that no largeacoustically reflective surfaces obstruct or are near the microphone element.Orient the meter with its microphone (usually at one end) pointing straightup toward the ceiling (not toward the speakers) and ensure that “C”weighting scale is selected. Set the meter to display 75 dB SPL. On RadioShack meters, this necessitates either setting the meter to its 80 dB rangeand taking your readings at the -5 point or selecting the 70 dB range andreading at the +5 point.OPERATIONUSING THE T 758 – SETUP MENU20ENGLISH PORTUGUÊSFRANÇAIS ESPAÑOL ITALIANO DEUTSCH NEDERLANDS SVENSKA РУССКИЙ