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SERVICE INFO
If you think your Mackie product has a prob-
lem, please check out the following trouble-
shooting tips and do your best to confirm the
problem. Visit the Support section of our
website (www.mackie.com/support) where
you will find lots of useful information such as
FAQs, documentation, and user forums. You
may find the answer to the problem without
having to send your Mackie product away.
Troubleshooting
No Power
• Our favorite question: Is it plugged in?
• Make sure the power cord is securely
seated in the IEC socket
all the way into the AC outlet.
• Make sure the AC outlet is live (check with
a tester or lamp).
• Is the POWER
switch on the rear panel
in the ON position?
LED or BYPASSED
• Is the POWER
LED on the rear panel illuminated? If not,
make sure the AC outlet is live. If so, refer
to "No Sound" below.
• If the POWER LED or BYPASSED
is not illuminated, and you are certain that
the AC outlet is live, it will be necessary
to have the HRS10 serviced. There are
no user-serviceable parts inside. Refer to
"Repair" at the end of this section to find
out how to proceed.
No Sound
• Is the POWER
LED or BYPASSED
LED on the rear panel illuminated? If not,
refer to "No Power" above.
• Is the INPUT SENSITIVITY
turned up?
• Is the signal source turned up? Make sure
the signal level from the mixing console (or
whatever device immediately precedes the
subwoofer) is high enough to produce sound.
Bad Sound
• Is the input connector plugged completely
into the jack?
• Is it loud and distorted? Reduce the signal
level at the mixer.
• If possible, listen to the signal source with
headphones plugged into the preamp stage.
If it sounds bad there, it's not the subwoofer.
• Too much bass or not enough bass? Move
around the room and see if the bass
response changes. It's possible your listen-
ing position coincides with a room mode
where the low frequencies either become
exaggerated or nulled. If so, try moving the
subwoofer to a different position, or moving
your listening position.
and plugged
• If the signal source is an LFE or subwoofer
output from a home theater preamplier,
make sure the signal level for the low-fre-
quency output is turned up in the preamp.
If you have connected the low-frequency
signal to the LEFT (and RIGHT) INput,
make sure the FILTER BYPASSED switch is
pushed in.
Noise/Hum/Buzz
• Check the signal cable between the mixer/
LED
preamp and the subwoofer. Make sure all
connections are secure. These problems
usually produce crackling noises, hum, or buzz.
• If connecting an unbalanced output to the
HRS10 balanced input, make sure the
shield is connected to both pins 1 and on
the XLR.
• If a CATV cable is connected to the system,
try disconnecting it. If the hum goes away,
call your cable carrier to check for proper
grounding of the cable.
control
• Make sure the signal cable is not routed
near AC cables, power transformers, or
other EMI sources (including wall warts
and line lumps!). These sources usually
produce hum.
• Is there a light dimmer or other triac-based
(SCR) device on the same AC circuit as the
monitor? Dimmers cause buzzing noises.
Use an AC line filter or plug the subwoofer
into a different AC circuit.
• If possible, listen to the signal source with
headphones plugged in. If it sounds noisy
there, it's not the subwoofer.
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