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. [. . . ] 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. NOTES · Allspeakersmustbeintheirfinallocationsbeforelevel-setting. · Yoursubwoofer(ifany)shouldbesetwithitsintegralcrossoverdefeated, orifundefeatable, settoitshighest-possiblefrequencyifyouareusing theM15HD'sSubwooferoutput. Finalsubwoofer-leveladjustment"byear, "usingmusicandfilmsoundmaterial, isfrequentlyuseful. · Duetotheeffectsofroomacoustics, matched-pairspeakers(front; surround;back)willnotalwayscalibratetoexactlythesameleveloffset readings. You can exit `Test' mode at any time by pressing key, bringing you back to `Speaker Setup' menu. You can also press the `TEST' key to discontinue the `Test' mode. SPEAKER LEVELS USINGANSPLMETER It is quite practical to perform the M15 HD 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. 1 SVENSKA 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. NEDERLANDS DEUTSCH ITALIANO ESPAÑOL FRANÇAIS ENGLISH OPERATION USINGTHEM15HD­SETUPMENU ENGLISH FRANÇAIS ESPAÑOL ITALIANO DEUTSCH In addition to the Volume knob, use the HTRM's VOL to adjust the "master volume" of the M15 HD raising or lowering the channels altogether. A momentary keypress will change the master volume by 1 dB increments. If you hold down VOL , the master-volume change will "run-on" until the key is released. Since recordings vary considerably in overall average level, there is no imperative to listen at any particular master-volume setting. A setting of -20 dB may sound "as loud" from one CD or DVD as -10 dB does from another. The M15 HD will power-up from Standby mode at whatever master volume setting was last used; however, if the prior setting was greater than ­20 dB, the M15 HD will power up at ­20 dB. This prevents inadvertently beginning a session at excessive volume. MUTINGTHESOUND Use the HTRM's `Mute' key to silence all channels completely. Muting is always available regardless of the source or listening mode selections. NOTES · Changinginputorlistening-modeselectionsdoesnotreleasemuting. · AdjustingthevolumelevelviatheHTRMorthefrontpanelvolumeknob willautomaticallyreleasethemutefunction. SPEAKER DISTANCE ADjUSTING CHANNEL LEVELS `ON THE FLY' Your system's speaker distance settings are a subtle but important refinement of your setup. Informing the M15 HD of the loudspeaker-tolistener 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). [. . . ] 2V in 2V out) ±10 dB at 100 Hz (ref. 2V in 2V out) >8 Vrms into 600 <0. 005% (ref. 20 Hz - 20 kHz, 2 V out) 56 k + 220 pF 40 mV (ref. 500 mV in 500 mV out, volume set to unity gain) >80 dB (ref. [. . . ]