Question about Mordaunt Short Avant 907W Subwoofer Speaker
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Posted on Jan 02, 2017
SOURCE: subwoofer noise
You didn't say is your sub active or passive.If its active first check signal cables from theater system,power line of the sub, it has to be the same phase as the system.If its passive take a voltmeter disconnect the sub from the system and measure for DC voltage on the SUB output on the system when its OFF.If DC voltage is present your amp is damaged.It can also be that the preamp circuit for the sub doesn't mute the input when unit is on stand by and you hear frequency of your power supply (50-60Hz) on the sub
Posted on Mar 10, 2008
Hiya, its the cone. The former is touching the magnet inside. Realignment is really tricky and dont know many people who can do that so you may either have to live with it or see if someone can recone it in your area.
Best of luck
Posted on Jul 15, 2009
It can be repaired. A transistor shorted and possibly some resistors burned open as well. This is due to an overload causing the transistor to drive hard creating heat and eventually shorting out. The transistor needs to be isolated, removed, and replaced as well as the resistors.
Posted on Nov 12, 2010
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