Mackie MR5mk2 Manuale Utente

MR5mk2

You should use high-quality, shielded cable to connect 

the signal source to the signal input jack [1] on the 
MR5mk2. 

•  For balanced signals, foil shielded cables, such as 

Belden 8451, 8761, or 9501 are commonly used for 
studio wiring.

•  Microphone cables work well for the XLR input.
•  The better the shield, the better the immunity from 

externally induced noise (like EMI and RFI). Route the 
cable away from AC power cords and outlets. These are 
common sources for hum in an audio signal. Wall warts 
and line lumps are especially insidious hum inducers!

  Quality cables may be purchased from Mackie dealers. 
•  In certain home theater applications, it may be necessary 

to connect the speaker outputs from a stereo receiver to 
the inputs of the MR5mk2, if the receiver doesn’t have 
preamp outputs or other line-level output connections.

CAUTION: Do not attempt to connect a 
speaker output directly to the input of the 
MR5mk2! Speaker levels are much higher 

than line levels and can damage the input circuitry in 
the MR5mk2.

However, it is possible to insert a speaker-level to 

line-level signal attenuator between the receiver’s 
speaker output and the MR5mk2’s input. The local 
Mackie dealer should be able to assist, or you can build 
your own.

Mackie Reference Studio Monitors will provide many 

years of reliable service if you follow these guidelines.

•  Avoid exposing the monitors to moisture.
•  Avoid exposure to extreme cold (below freezing  

temperatures).

•  Use a dry cloth to clean the cabinets. Only do this when 

the power is turned off.

There are several protection mechanisms designed 

into the MR5mk2 to safeguard the loudspeakers and 
amplifiers from inadvertent damage.

CAUTION: The protection circuits are  
designed to prevent damage to the  
loudspeakers under reasonable and sensible 

conditions. Should you choose to ignore the warning 
signs (i.e., excessive distortion), you can still damage 
the speakers in the MR5mk2 by overdriving them. Such 
damage is beyond the scope of the warranty.

A 12 dB/octave high-pass filter at 50 Hz just prior to 

the low-frequency amplifier prevents very low  

 

frequencies from being amplified. Excessive  
low-frequency energy below 50 Hz can damage the 
woofer by causing it to “bottom out,” also known as 
overexcursion, which is equivalent to a mechanical form 
of clipping.

All amplifiers produce heat. The MR5mk2 is designed 

to be efficient both electrically and thermally.

•   If for some reason the heatsink gets too hot, a thermal 

switch activates and turns off the amplifier. This  
protection operates independently for the  

 

low-frequency and high-frequency amplifiers. Therefore, 
it is possible for only the low frequency or high  
frequency amplifier to shut down while the other 
remains on.

•   When the heatsink cools down to a safe temperature, 

the thermal switch resets and normal operation  
resumes.

•   If the heatsink temperature again gets too hot, the  

shutdown process repeats. Should this happen, make 
sure that airflow to the rear of the cabinet is not  
restricted. 

The MR5mk2 contains drivers with large magnetic 

structures. The drivers’ magnets are shielded to help 
prevent the magnetic field from radiating out into the 
environment and playing havoc with computer monitors 
or TV screens. Unshielded speakers can cause  
distortion in both the shape and color of the picture 
if placed too close to a CRT (cathode ray tube). If you 
have a particularly sensitive computer monitor or TV 
screen, it may be necessary to move the speakers a few 
inches away.