Mackie SRM1801 - Appendix A: Service Information; Troubleshooting; No Power; No Sound

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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.