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6. USE OF THE "LOW PASS FILTER" CONTROL
The back panel control "LOW PASS FILTER" sets the upper rolloff point of the Subwoofer,
eliminating mid-bass and midrange that are being reproduced by your Satellite speakers. The control
is a means of fine-tuning the transition between your Subwoofer and Satellite speakers, and it provides
a rolloff of 18 dB/octave up to 125 Hz, where the filter shifts to 36 dB/octave. In most systems, including
M&K Satellites, 85 Hz gives the best blend. If you don't want to experiment, set the control at 85 Hz.
The goal is to get a balanced
acoustic
output in your room. This is not necessarily the same as
flat electrical output. Rooms typically reinforce bass frequencies around 100 Hz, so by leaving an
electrical gap, you may actually get a smooth acoustical response where it matters, in the room.
Think of this control as a mid-bass fine tuning adjustment that you set to achieve the best transition
between the Satellite speakers and the Subwoofer. When you hear a smooth sound overall, well
balanced between the deep bass and the rest of the audible spectrum, the control is set properly.
7. USE OF THE "BYPASS" SWITCH (MX-125 Mk II ONLY)
If you have a THX or non-THX Dolby Digital component with a built-in Low-Pass filter as part of
its subwoofer output, or if you are using a separate Electronic Crossover, set the “VARIABLE” /
“BYPASS” switch on the back of the MX-125 Mark II to the “BYPASS” position. This bypasses the
internal low-pass of the MX-125 Mark II so that there is no interaction between the subwoofer’s filter
and your component’s filter. If you have any questions regarding the filters, please contact your M&K
dealer or the M&K factory.
8. USING MULTIPLE SUBWOOFERS
Using two (or more) subwoofers in your system gives you the ultimate in bass performance. You'll
hear improved impact and definition, as well as greater output and dynamic range. If the Subwoofers
are located in different parts of the room, you will hear a much smoother bass response, as the room
modes excited by one woofer are effectively reduced by the presence of the other.
With two Subwoofers, simply run one speaker wire or interconnect to each Subwoofer. Because
the left and right channel input signals are combined in the Subwoofer's input stage, the only thing this
changes is amplifier gain. To compensate, just set the "BASS LEVEL" control slightly higher.
9. FINE-TUNING SUBWOOFER PLACEMENT
If you have the physical space in your room and the interest to experiment with the placement of
your Subwoofer, you may be able to even further optimize its sound by moving its location. If you want
to do this, listen to the Subwoofer after it is hooked up, using a familiar CD, LP, Laserdisc, or tape with
good bass content. After you move the subwoofer from one location to another, listen again, paying
attention to the changes in the amount and quality of bass reproduction.
Ultimately, the amount and quality of bass you get in your room are dependent on the room itself.
Low frequency bass sounds are affected most by the size of the room and the method of construction
used to build it. All rooms are different when it comes to reproducing bass, and in any given room, bass
quantity and quality changes when the Subwoofer is moved from one location to another.