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10
MRS10
MRS10
Care and Cleaning
MRS10
Reference Studio Subwoofers will
provide many years of reliable service if you follow
these guidelines.
• Avoid exposing the subwoofers 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.
The Ins and Outs of Polarity
The MRS10 studio subwoofer includes a switch that
allows you to quickly invert the polarity of the
subwoofer’s output relative to the input signal it is
receiving from the mixer or other sound source.
But what exactly does that mean? A subwoofer works
by literally pumping air as the woofer cone moves in
and out with respect to the cabinet in which it is
housed. It does so according to the low-frequency
portion of the signal it receives from the sound source.
The woofer cone is simply following the waveform as
seen in the sine wave in Figure 1. As the sine wave rises,
the woofer cone pushes out. Likewise, as the sine wave
falls, the woofer cone pulls into the cabinet. A musical
signal is much more complex, of course, but the same
principle applies. Movement of the woofer cone causes
air pressure changes that we perceive as sound.
When the polarity switch is to the right, the original
waveform is simply reversed 180˚ [see Figure 2].
Again, the subwoofer cone follows the waveform.
However, this time the woofer cone starts by pulling
into the cabinet followed by the woofer cone pushing
out. If you have ever experimented with a subwoofer
polarity switch, you may not have noticed any changes
to the sound regardless of its position, especially if
you are listening to just the subwoofer. This is normal,
as our ears perceive them both at the same time.
The polarity switch comes into play when the MRS10
studio subwoofer is paired with a studio monitor.
Ideally, the woofer cones of the subwoofer and monitor
would work together by pushing and pulling in unison.
MRS10 studio subwoofers are designed to be used in
a broad range of applications. The flexibility provided
by the polarity switch is necessary to ensure that you
are receiving the best possible sound from your system,
regardless of your setup.
<–– Time ––>
Figure 1: 0˚
Amplitude
Amplitude
Figure 2: 180˚
<–– Time ––>
Polarity Waveforms
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