Mackie 1801 Subwoofer makes big banging loud noises occasionally.

Rufuss Sewell · 29th May 2009

If I leave my Mackie Sub on for a couple of hours it starts making horrible loud noises. It starts off sounding like someone knocking at the door. After a while it turns into a solid note. It's full volume regardless of the volume knob position and the "thermal" light comes on every times the noise happens.

Any clue what this could be?

Les · 29th May 2009

What i'm hoping for you is that it's from a bad input connection, or problems with the gear feeding it.. You could wire up an xlr with pins 2 and 3 shorted and plug it in to see.

If it still happens the unit needs to go in for repair. That sounds likely since the volume knob has no effect.

Les
L M Watts Technology

Matt Syson · 29th May 2009

hi
Unplug everything except the power cable and leave it on. If it makes the noise still then it is time to get it fixed. Terminating the input with a 'shorted' XLR should not be necessary to prove this much.
Matt S

29th May 2009	#1
Rufuss Sewell Lives for gear Join Date: Aug 2005 Location: Austin, TX Posts: 1,925 Thread Starter	Mackie 1801 Subwoofer makes big banging loud noises occasionally. If I leave my Mackie Sub on for a couple of hours it starts making horrible loud noises. It starts off sounding like someone knocking at the door. After a while it turns into a solid note. It's full volume regardless of the volume knob position and the "thermal" light comes on every times the noise happens. Any clue what this could be? __________________ My Studio: www.Nebulost.com My Band: www.OneEyedDoll.com

29th May 2009	#3
Matt Syson Lives for gear Join Date: Sep 2004 Location: UK Posts: 4,567	hi Unplug everything except the power cable and leave it on. If it makes the noise still then it is time to get it fixed. Terminating the input with a 'shorted' XLR should not be necessary to prove this much. Matt S __________________ Matt S www.mseaudio.co.uk

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29th May 2009	#2
Les Gear addict Join Date: Feb 2008 Location: Tiger, Ga Posts: 472	What i'm hoping for you is that it's from a bad input connection, or problems with the gear feeding it.. You could wire up an xlr with pins 2 and 3 shorted and plug it in to see. If it still happens the unit needs to go in for repair. That sounds likely since the volume knob has no effect. Les L M Watts Technology