Alesis prolinear 720 powered monitor stopped working
I have a pair of alesis prolinear 720 powered monitor speakers. For some reason , the right speaker has stopped working. When I power it on, the LED remains ''red''. It should turn green almost immediately. There is white noise from the tweeter, and the woofer makes a soft thud sound as it protrudes forward and remains in this position until I power the speaker off. It's as if there is a continuous ''hot'' input source going to the amp section. This happens even without any input, only power to the speaker. Can anyone help me.
Music - Alesis
Answers & Comments
Yeah. I think you should listen to that guy, Lamar Barton.
The power amp has failled and is driving DC current to the speaker. This can destroy the speaker. It is LIKELY that one or more transistors in the power amp and possibly other components have failed.
The unit will have to be serviced by an electronics repair facility. It takes test equipment to weed out all the failed parts, and it is likely there are several since when one fails it often burns up others. Likely one of teh power transistors or the amplifier "stick" has shorted. I would guess the parts will cost under $25 but finding which are bad can be labor intensive.
In the meantime DO NOT power the unit or you may destroy the voice coil of the speaker.