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SPEAKER PLACEMENT:

The M-20 Monitor System is intended to provide consistent performance over a wide range of placement 
situations.   This is accomplished through the use of electrical controls, wide dispersion drivers, 
advanced enclosure design and carefully chosen crossover characteristics.   Nevertheless, it is always 
worth investing time and effort experimenting with optimum loudspeaker placement.   In all cases, the 
M-20 Monitors should be set up the same distance from the listening position. (see fig. 8 below)   This is 
important in order to insure equal arrival time of all channels to the listening position.   Ideally, the 
tweeter height on the M-20 monitor, as with all channels, should be on axis with your ears, or slightly 
above.   Also, remember that nearby reflective surfaces (including video monitors) can alter impulse 
response, blur   imaging and   change   tonality; giving the M-20 as much room as possible assures the 
highest-quality reproduction.

SYSTEM  OPERATION:

The M-20 is capable of very high output levels, especially when listening in the near-field.     Still, every 
speaker system has its limits.   Harsh breakup at extremely high volume, or heat emanating from the drivers 
is an indication that the system has exceeded its output limits and that you should lower the playback level.   
Watch for excessive lighting of the front-panel overload indicator on the Control Amplifier.   Speaker 
damage most often occurs from sustained high volume levels, not from transient sounds or brief musical 
peaks.   Protect your ears and use common sense.

M-20   MONITOR  SYSTEM  CARE:

Except for the occasional flattering comment, your M-20 System needs no regular maintenance.   Never 
attempt to clean the M-20 Monitor driver units except for very light feather dusting.   The M-20   Monitor 
cabinets and the M-20 Control Amplifier front panel can be cleaned using a damp, soft cotton cloth first 
sprayed with a mild, non-abrasive glass cleaner and with the unit unplugged and AC power off.   Never spray 
the speaker or amplifier directly!   Avoid   silicone and oil based cleaners or treatments.   

NEED SOME HELP?

Technical Support can be reached several ways:     Telephone us 800-NHT-9993 (648-9993,   E-mail us at: 
[email protected], Fax us at: (707) 747-1252 or   write us at: NHT, 6400 Goodyear   Rd.   Benicia,   CA 94510.   Or visit 
our web site at www.nhtpro.com.

Fig. 8  Ideal 5.1 Surround Monitor Placement

M-20

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The Distance of
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Содержание Pro Audio M-20

Страница 1: ...M 20 Powered Monitor Owner s Manual M 20 Control Amplifier Serial Number M 20 Monitor Serial Number Rev 6 06 Pro Audio...

Страница 2: ...tion Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them paying particular attention to cords and plugs convenience receptac...

Страница 3: ...esigning the system as an integral package of control amp cables and monitor many of the advantages of self powered speakers can be realized without the possible attendant performance compromises of f...

Страница 4: ...shown in Fig 3a Using the included cable to connect the M 20 Monitor to the Control Amplifier is quite simple and straightforward fit the XLR connectors into the corresponding connectors on the Contro...

Страница 5: ...levels over 120 dB are shown as HI Since monitoring level has a profound influence on the perception of sonics periodically checking SPL helps to assure consistent results VAC This is a reading of th...

Страница 6: ...increased listening distance a speaker s upper frequency power response attenuates due to room influences and air absorption The M 20 may be adjusted to compensate for this change and provide flat re...

Страница 7: ...breakup at extremely high volume or heat emanating from the drivers is an indication that the system has exceeded its output limits and that you should lower the playback level Watch for excessive lig...

Страница 8: ...hum noise 10 dB SPL 1M System THD 90 dB SPL 0 4 100Hz 10kHz 1M Response 2 dB 1 3 oct swept noise 48Hz 20kHz 1M 45Hz 20kHz 2M 6dB LF cutoff 40Hz in room response Control Amplifier Dimensions Wgt 1 75 h...

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