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signal from the electrical ground of the power amp module. This switch may be needed for
the cancellation of hum due to ground loops with other apparatuses.
If the audio signal is already disturbed when it arrives to the loudspeaker, this switch
will not solve the problem. Identify the upstream component that is creating the problem,
and take whatever measures are necessary to eliminate the hum.
COOLING (11) - Forced ventilation stabilizes the working temperature of electronic
components for continuous performance, even after a long period of operation. To ensure
the adequate cooling of components, never block this opening.
ON/OFF SWITCH (12) - On/off power switch. It's good practice to power on the subwoofer only
after you've plugged in the power cord and signal cables, and turned on all audio sources
(mixer, effect units etc). Turn the switch off BEFORE unplugging the cabinet and before
turning off any connected equipment.
POWER JACK (13) - Power jack for connecting the unit to a power source.
FUSE (14) - Fuse housing.
3.2 CONTROL PANEL - AS 121S - AS 151S - AS 122SF - AS 152SF
crossover settings, and more!
PHASE (11) - Phase inversion 0°- 180°. In some installations,the subwoofer may be out of
phase with the satellites. This switch allows you to reverse the phase of the subwoofer
and align the system.
INPUT RIGHT & LEFT/MONO (1-3) - Line input jacks for
connecting stereo audio sources. The XLR 3-pole
female jacks are electronically balanced (hot pole
#2). You can use unbalanced sources if your cables
have pole 3 jumpered with pole 1.
LINK RIGHT & LEFT/MONO (2-4) - Line out to connect
more subwoofers downstream from the principal system.
This 3-pole male XLR jack receives a female XLR plug
(7) and sends out a passive signal.
INPUTS & LINKS GROUND LIFT (5-6-7-8) - A switch that
disconnects the ground of the input audio signal from
the electrical ground of the power amp module. This
switch may be needed for the cancellation of hum due
to ground loops with other apparatuses.
If the audio signal is already disturbed when it
arrives to the loudspeaker, this switch will not
solve the problem. Identify the upstream component
that is creating the problem, and take whatever
measures are necessary to eliminate the hum.
PC CONTROL - INPUT & LINK (9-10) - (OPTIONAL, SOLD
SEPARATELY) - RJ45 connector links your cabinet to
your computer through the MARKAUDIO PC BOX (sold
separately). Thanks to the Markaudio software you can
tune the cabinets to any venue, with both 21-band
graphic and parametric EQ, modifiable limiter and
07
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