MACKIE SRM1801 - Manual (Page 13)

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Appendix A: Service Information
If you think your Mackie product has a problem,
please check out the following troubleshooting tips and
do your best to confirm the problem. Visit the Support
section of our website (www.mackie.com/support) to
get some ideas or contact our technical support heroes.
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 line cord is securely seated in the
line cord socket and plugged all the way into the
AC outlet.
• Make sure the AC outlet is live (check with a
tester or lamp).
• Is the POWER switch in the ON position?
• 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 LEDs are not illuminated, and you
are certain that the AC outlet is live, it is possible
the fuse has blown.
No Sound
• Is the power LED on the rear panel illuminated?
• Is the LEVEL control 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.
• If it’s a stereo pair, try switching them around.
For example, if a left subwoofer is presumed dead,
switch the left and right cords at the subwoofers.
If the problem switches sides, it’s not the
SRM1801. It could be a bad cable, or no signal
from the mixer.
Bad Sound
• Is the input connector plugged completely into
the input jack?
• Is something connected to an output jack? Try
unplugging it. If the sound improves, whatever
was plugged into the output jack may have
affected the signal.
• 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 listening position
coincides with a room mode where the
low frequencies either become exaggerated or
nulled. If so, try using an alternate polarity switch
position, moving the subwoofers to a different
location in the room, or moving your listening
position.