Signal Outputs; Auto Power Switch And Led; Polarity Switch; Crossover Level - Mackie MR10Smk3 Owner's Manual

5. Signal Outputs

Connect these output jacks to the input jacks
of studio monitors. Balanced 1/4" female connectors
are provided for the left and right outputs.
The frequency range depends on where the crossover
level [8] is set.
These output jacks are wired as follows, according
to standards specified by the AES (Audio Engineering
Society):
Balanced 1/4" TRS
Hot (+)
Cold (–)
Shield (Ground)
Balanced 1/4" Connectors

6. Auto Power Switch and LED

This 3-position switch turns the amplifiers on or off,
or sets them to automatic mode. Use this switch to set
the MR10Smk3 to your preferred mode of operation.
• In the OFF position, the power amplifiers are off and
the MR10Smk3 subwoofer produces no sound. Low-level
circuitry is still active, but the power consumption of
the circuitry is minimal.
• Flip the switch to the ON position and the power
amplifiers are live and operate normally.
• When this switch is in the AUTO position, the amplifiers
turn on and off depending on the prescence or absence
of an input signal. An input signal of at least –40 dBu
activates the auto-on function. A silent period greater
than 13 minutes activates the auto-off function.
The LED above the switch will illuminate GREEN
indicating that signal is present in the MR10Smk3
subwoofer.
The LED above the switch will illuminate RED
indicating that the MR10Smk3 subwoofer is being
pushed too hard. Turn down the main mix level
on the mixer (or other input source) or input level [9]
on the subwoofer.
Tip
Ring
Sleeve
RING SLEEVE SLEEVE RING TIP
TIP
RING
TIP
SLEEVE

7. Polarity Switch

This switch – when left – sends a normal (0˚)
polarity of the signal into the subwoofer amplifier.
It has no effect on the signal at the outputs.
This switch – when right – reverses the polarity of
the signal going into the subwoofer amplifier by 180˚.
It has no effect on the signal at the outputs.
There is no right or wrong setting for this switch.
Listen to the overall blend of the subwoofer with the
rest of the system and select the switch position that
gives you the best sound for your audience. In fact,
your system may vary when positioned differently and
in alternate venues. Don't be afraid to experiment with
the position of the polarity switch. See page 9 for more
information.

8. Crossover Level

The MR10Smk3 crossover allows you to choose
a crossover frequency for studio monitors, ranging
from 40 Hz to 180 Hz.
Listed below are the recommended crossover
frequencies for each MRmk3 full-range monitor,
but use them as a guideline. Set the crossover level
to what sounds best to your ears.
• MR5mk3 : 57 Hz
• MR6mk3 : 46 Hz
• MR8mk3 : 40 Hz

9. Input Level

MR10Smk3 studio subwoofers expect a line-level
signal at its input. Use this control to adjust the
sensitivity of the input section according to the
signal strength at its input.
• Balance the subwoofer to your desired low-frequency
output level and adjust the crossover [8] to your
desired setting.

10. Custom-Tuned Rear Shelf Port

The custom-tuned rear shelf port uses the radiation
from the rear of the woofer cone to extend the low-
frequency response of the speaker. The size of the port
is carefully designed with respect to the volume of the
cabinet and the characteristics of the woofer to produce
low-frequency extension.
Owner's Manual
7