Question about Mackie SRM-450 System
This could be a grounding problem, it might change if you plug it in elsewhere or it might be where you live.
Posted on Jan 29, 2009
Repaired the LFamp: fet's and power transistors replaced. Now got the same problem: on power on a huge hum (sawtooth) for 2 seconds, and a crackling noise even with no signal fed and gain at ccw. Other speaker is OK, so no mains problem here.
Posted on Dec 07, 2009
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