User manual NAD M15 HD

[. . . ] ® Owner's Manual AV Surround Sound Preamplifier M15 HD SVENSKA NEDERLANDS DEUTSCH ITALIANO ESPAÑOL FRANÇAIS ENGLISH IMPORTANT SAFETY INSTRUCTIONS ENGLISH FRANÇAIS ESPAÑOL ITALIANO DEUTSCH NEDERLANDS SVENSKA 1. Readinstructions- All the safety and operating instructions should be read before the product is operated. Retaininstructions- The safety and operating instructions should be retained for future reference. HeedWarnings- All warnings on the product and in the operating instructions should be adhered to. [. . . ] Set `Subwoofer' to "On" or "Off, " selecting "On" only if you have a subwoofer connected to the M15 HD's SUBW1 or SUBW2 output jack. ENHANCEDBASS When the subwoofer is set to ON and "Front" is set to "Large", Enhanced Bass is also 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 40Hz to 200Hz. NOTE Theconfigurationssetforthat`SpeakerSetup'arecarriedoverwhenever itisenabledduringA/VPresetsetting. Pleaseseealsothesection`AV Presets'forreference. 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 toward the speakers) and ensure that "C" weighting scale is selected. 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. SETTINGSPEAKERLEVELSATTESTMODE While at `Speaker Levels' menu, press the HTRM remote's `Test' key activating the M15 HD's Speaker Levels balancing test signal . You will hear a "surf" sound as you step through your speakers (`test' appears to the right side of the current speaker), beginning with the Front Left. If you do not hear the test signal, check your speaker connections or your `Speaker Setup' OSD menu settings. 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 Front Left). As you cycle the test signal around the speakers, the OSD will highlight the currently playing channel. The "level offset" reading on the right will change by 1 dB increments; ±12 dB adjustment is available. NOTE Ifyouarebalancinglevels"byear", chooseonespeaker--usuallythe center--asareferenceandadjusteachoftheothersinturnto"soundas loud"asthereference. Besurethatyouremainintheprimarylistening positionwhilebalancingallchannels. To produce the same SPL meter reading (or subjective loudness), use the remote's keys to adjust each speaker. [. . . ] · Correct `Speaker Configuration' or `Speaker Levels' settings. POSSIBLESOLUTIONS · Check AC cable connection and outlet. · Subwoofer set to "OFF" on `Speaker Configuration' menu. · Center set to "OFF" on `Speaker Configuration' menu. · Source's digital output is not connected to a M15 HD digital input. [. . . ]