User manual NAD T748

[. . . ] ® Owner’s Manual AV Surround Sound Receiver T 748 РУССКИЙ SVENSKA NEDERLANDS DEUTSCH ITALIANO PORTUGUÊS ESPAÑOL FRANÇAIS ENGLISH IMPORTANT SAFETY INSTRUCTIONS ENGLISH FRANÇAIS ESPAÑOL WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE. 8 Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. 9 Do not defeat the safety purpose of the polarized or grounding type plug. When the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. [. . . ] • A “Small” speaker is any model, regardless of physical size, that lacks significant deep-bass response, that is, below about 150 Hz. • A “Large” speaker is any full-range model; that is, one with deep-bass response • An “None” 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 “None”. The Speaker Configuration is “global”; that is, it remains in force with all inputs and in all listening modes. However, speaker settings are part of the T 748’s A/V Preset system. Consequently, multiple speaker settings can be stored for easy recall as different types of recordings or listening modes require. Speaker Configuration can be managed and adjusted by pressing a combination of [ S ] and then [ D/F ] keys. Set “Front”, “Center”, “Surround” and “Back” to “Large”, “Small” (“Small 60Hz” up to “Small 150Hz”) or “None” as your subsystem’s speakers require. Set “Subwoofer” to “On” or “Off, ” selecting “On” only if you have a subwoofer connected to the T 748’s SUBW output jack. If the “Subwoofer” is set to “Off”, “Front” speaker will automatically be set to “Large”. ENHANCED BASS When the subwoofer is set to “On” and “Front” is set to “Large”, Enhanced Bass becomes available. Normally, with speakers set to “Large” the subwoofer is not active. The Enhanced Bass option allows full range operation of the speakers with the additional bass contribution of the subwoofer. This feature is particularly useful when one wants to experience maximum bass output. Please note that due to acoustic cancellation effects, the bass response may be uneven when using this setting You can set Subwoofer to “On” even with “Large” front speakers, in which case bass content from any channels set to “Small” will be routed to both the subwoofer and to the front speakers; LFE-channel signal will pass only to 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 the range 60Hz to 150Hz. NOTE The configurations set forth at “Speaker Setup” are carried over whenever it is enabled during A/V Presets setting. Please see also the section “AV Presets Setup” for reference. 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 748 level setup routines “by ear, ” and careful work will produce acceptably accurate results. [. . . ] • Subwoofer level set too low on “‘Speaker Levels” menu. • Center set to “OFF” on “Speaker Configuration” menu. • Center level set too low on “Speaker Levels” menu. • Source’s digital output is not connected to a T 748 digital input. [. . . ]