Question about Mirage LF100 Subwoofer

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Mirage LF100 Subwoofer is humming/buzzing whenever switched on regardless if connected to a source or not. LED on front panel does not illuminate.

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  • steve_kovari
    steve_kovari Feb 09, 2012

    The internal fuse checked out good. The subwoofer does provide distorted sound when connected to a source.

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  • Master
  • 3,799 Answers

This sounds as if a component has blown on the crossover board. (Probably a capacitor.)

Posted on Feb 09, 2012

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Posted on Jan 02, 2017

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SOURCE: Constant noise from Mirage NanoSat 5.1 System Subwoofer

sounds like an earth fault either with the plug circut or more likely with the power board of the unit.

Posted on Jan 06, 2010

dunnbiker
  • 8546 Answers

SOURCE: I have a Mirage Omni

Disconnect all inputs. If it still buzzes there's probably a broken ground somewhere inside it. Technical know-how necessary to proceed.

Otherwise, the buzz originates externally and leaks in through the cabling.

Posted on Jul 07, 2011

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How to Stop a Subwoofer Hum - HowStuffWorks

electronics.howstuffworks.com/how-to-stop-subwoofer-hum.htm
Would you like to learn how to stop your subwoofer from making a consistent low-frequent hum or buzz? Read this article to learn how to stop a subwoofer hum.

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I'm thinking you have an open shield ground on the RCA input side. Connecting speaker inputs possibly restores the ground. Try connecting the high level inputs then disconnect the remote end of the cables (floating the grounds).

Then get out an ohmmeter and find that open circuitor or bad solder joint between RCA ground and real ground in the speaker's amplifier. Or.... if speaker ground kills the hum and you want to use RCA Line Level input to the sub, just connect one minus speaker output on your source amp to one minus on the sub's amp.

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