NHT M-60 Xd Manuel utilisateur
M-60 Xd
DSP Corrected Monitor System
Owners Manual
Safety instructions - Please Read First
DETAILED SAFETY INSTRUCTIONS:
All the safety and operation instructions should be read before the appliance is operated.
Retain Instructions:
The safety and operating instructions should be retained for future reference.
Heed Warnings:
All warnings on the appliance and in the operating instructions should be adhered to.
Follow Instructions:
All operation and user instructions should be followed.
Water and Moisture:
The appliance should not be used near water (e.g. near a bathtub, washbowl, kitchen sink. laundry tub, in a wet basement, or near a swimming
pool etc.).
Ventilation:
The appliance should be situated so that its location or position does not interfere with its proper ventilation. For example, the appliance should not
be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings, or placed in a built-in installation, such as a bookcase
or cabinet that may impede the flow of air through the ventilation openings.
Heat:
The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other appliances (including other amplifiers)
that produce heat.
Power Source:
The appliance should only be connected to a power supply of the type described in the operating instructions or as marked on the appliance.
Grounding and Polarization:
Precautions should be taken so that the grounding or the polarization means of the appliance is not defeated.
Power Cord Protection:
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 particu-
lar attention to cords and plugs, convenience receptacles and the point where they exit from the appliance.
Cleaning:
The appliance should only be cleaned as recommended by the manufacturer.
Non-use Periods:
The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time.
Object and Liquid Entry:
Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings.
Damage Requiring Service:
The appliance should be serviced by qualified service personnel when;
The power supply cord or the plug has been damaged; or
Objects have fallen, or liquid has been spilled into the appliance; or
The appliance has been exposed to rain; or
The appliance does not appear to operate normally or exhibits a marked change in performance; or
The appliance has been dropped, or the enclosure damaged.
Servicing:
The user should not attempt to service the appliance beyond what is described in the Operating Instructions. All other servicing should be referred
to qualified service personnel.
The lightning flash with arrowhead symbol, within an equilateral
triangle, is intended to alert the user to the presence of
uninsulated "dangerous voltage" within the product's enclosure
that may be of sufficient magnitude to constitute a risk of electric
shock to persons.
The exclamation point within an equilateral triangle is intended to
alert the user to the presence of important operating and
maintenance (servicing) instructions in the literature accompanying
the appliance.
Marking by the "CE" symbol (shown left) indicates compliance of
this device with the EMC (Electromagnetic Compatibility) and LVD
(Low Voltage Directive) standards of the European Community.
INTRODUCTION
The M-60 Xd is a high-resolution monitoring system designed for mixing, editing and mastering. The
M-60 Xd employs DEQX calibration, a proprietary dsp correction system that corrects frequency and
time domain response in real time. In addition, the system offers almost “brick wall” digital crossovers
(up to 300dB per octave) and does all processing with latency less than 10ms making it useful for film
production as well as music. The benefit to the audio professional is a wider sweet spot, a higher out-
put system and dead-on accurate reproduction.
The system includes a pair of monitors and a dedicated, outboard processor amplifier. The uniquely
shaped cabinet is ideally designed for near-field listening. The wide baffle around the tweeter
promotes even power response, and the narrow baffle surrounding the woofer reduces midrange
reflections and reduces cabinet resonance. The lack of parallel surfaces on the cabinet minimizes the
formation of internal standing waves. The drivers employed in the M60 monitors are designed for
power handling and extremely low non-linear distortion.
The XdA amplifier/processor houses the DEQX DSP processor, switching power supply and four
150W, class D amplifiers. The system is bi-amplified, each amplifier is dedicated to a single driver in
the system.
The M-60Xd can be used as a stand alone monitor pair or be mated with the NHT S-80 subwoofer for
a full range system. The M-60 Xd offers accuracy previously unknown in the loudspeaker universe.
The system has a frequency response of +/- 0.5dB from 55Hz - 20kHz, with distortion less than 0.3%
above 100Hz at 90dB SPL.
The M-60 Xd is shipped with factory preset filters. The system is as future-proof as we can make it.
As we develop new filters and other uses for the DEQX DSP engine, you can upgrade your system
via the USB2.0 port found on the back of the XdA.
Unpack all cartons:
Check Contents with Packaging Contents list below:
Loudspeaker Carton
- Loudspeaker
Accessory Box:
- 20' 4-conductor speaker wire
with quad banana plugs on both ends
- Rubber Pads
XdA Carton:
- Integrated Digital Amplifier
- Power Cord
- This Manual
XdA PLACEMENT
The XdA is designed to be placed on a shelf or table. It should never be placed on a carpeted surface
as this will affect the airflow coming into the unit on the bottom side. The feet should never be removed
from the bottom of the unit. The XdA can be rack mounted with the aid of a rack pan or tray. At this
time we do not have a rack ear option available for it.
Before making any connections, make sure that all devices in the system are turned off. Connect the
output of your mixer, preamplifier or soundcard to either the RCA or XLR inputs. The inputs are wired
in parallel, so only one set of inputs should have patch cords connected to them at a time. The XLR
inputs are wired as shown below.
The XdA utilizes a switching power supply that automatically senses the incomingAC line voltage and
adjusts accordingly. The range of AC voltages it can be used with is from 90-260VAC. There are no
external fuses or switches that need to be changed when moving the unit from one country to
another.
A grounded power cord must always be used with the XdA. Never lift or break the ground connection.
If your system installation has hum problems, fix the ground loop the proper way at the signal level
connections. Excellent information on these problems and how to fix them are available at the Jensen
Transformer's website, www.jensentransformers.com, under the white paper section.
Inputs
M-60Xd SPEAKER CONNECTIONS
The M-60 Xd system comes with a pair of 25' long 4-conductor speaker wires to connect the XdA to
M-60 Xd speakers. Each end of the wires is pre-terminated with a quad banana plug. These banana
plugs are lettered A, B, C, D to indicate the correct polarity for installation on the XdA and M-60 Xd
end. Simply plug the wire in at each end observing the correct polarity.
If you need a longer wire run between your XdAand M-60 Xds, there a couple of options. You can pur-
chase quad banana plug kits and bulk wire directly from NHT or fabricate your own. To facilitate your
own harness construction, the A and B terminals of the quad banana plugs are spaced on standard
¾" banana plug/binding post dimensions, as are the C and D terminals. The B and C terminals are not
spaced on ¾" centers. Standard dual banana plugs can be plugged into the A-B and C-D terminals. If
you fabricate your own harness, make absolutely sure to connect the A terminal on the XdA to the A
terminal on the M-60 Xd. Do the same for the B, C and D terminals. Misconnecting the terminals can
result in serious damage to the M-60 Xd speaker.
Optional
Optional S-80 SUBWOOFER
If you are using an S-80 subwoofer with your M-60 Xd system, connect the supplied XLR patch cord
from the #1 XdW output on the back of the XdA to the input on the S-80 subwoofer. Set the XdW out-
put switch on the back of the XdA to the Single subwoofer position.
If you are using two S-80 subwoofers with your M-60 Xd system, connect the first S-80 to the #1 XdW
output and the second S-80 to the #2 output. Set the XdW output switch to the Dual position.
For correct operation of your system with the S-80 subwoofer,
you must have a subwoofer compatible filter set loaded into
the XdA. For information on this, see your S-80 manual or
contact NHT.
Single Subwoofer
Dual Subwoofer
SYSTEM CONTROLS
Power Switch:
The main AC power switch is located on the rear panel by the IEC inlet socket for the AC power.
Trigger Control:
The XdA power status can be controlled several different ways through the External Trigger switch
located on the rear panel. When the Trigger Mode is set to On, the XdApower will always be on. When
set to Audio, the XdA will automatically power up whenever it detects an audio signal at either of the
inputs. When set to Ext., the XdA will power up whenever it detects a 12VDC signal at the External
Trigger input. When the XdA powers up from the power switch or any of the trigger sources, there may
be a slight tick heard through the speakers. This is normal.
SPEAKER MODE:
The XdA is programmed with four different filters for each of the two channels. Each of these filters is
designed for a particular application or acoustic setting. For example one filter might have a bass rolloff
at 80Hz for use with a subwoofer. Another filter may have rolled off high frequencies to compensate
for a very reflective room, while another may cut the low frequencies of the M-60 Xd sharply to allow
it to produce higher SPLs. The combination of these eight filters is called a filter set. Contact NHT or
visit our website at www.nhthifi.com to find out what other filter sets are available for your M-60 Xd
system.
The ability of the M-60 Xd system to change performance characteristics simply by changing the filter
set is one of the great advantages of DSP processing that the M-60 Xd system offers. What follows
below is a description of the stock filter settings in the M-60 Xd system as shipped from NHT and how
to access them.
Each filter setting is accessed by the mode buttons on the front panel of the XdA. The left mode
button accesses the four filters for channel 1, the right button accesses the filters for channel 2. To
change the filter setting for one of the channels, simply depress the mode button for that channel until
the appropriate icon is illuminated. The top icon is for filter setting #1, the next icon down is for filter
setting #2 and so forth.
Set 1:
In this filter setting, the system has a flat
frequency response that rolls off slowly below
70Hz.
Set 2:
In this filter setting, the system has a flat
frequency response that rolls off sharply below
45Hz.
Set 3:
In this filter setting, the system has a flat
frequency response that rolls off sharply below
45Hz and a 1dB depression from 2-6kHz.
Set 4:
In this filter setting, the system has a flat
frequency response that rolls off sharply below
45Hz and a 1dB shelving above 2kHz. (See the
specifications page for details of the frequency
response differences.)
LOCKOUT MODE:
If neither mode button is depressed for
several minutes, most of the front panel illumi-
nation turns off and the mode buttons become
inactive. This feature serves several purposes.
It saves power, reduces ambient light when
doing video work, and most importantly keeps
prying fingers from messing with your controls!
To gain access to the mode functions again,
depress both mode buttons for several sec-
onds until the front panel illuminates again.
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