Why does my subwoofer make a humming noise? The voltage difference between a subwoofer electrical ground and the equipment ground can cause it to hum. This can happen because of the irregular current flow in your audio cable. Turning on the volume too high can also cause a hum.
Hello Redman, I sent you the link to download the service manual of model B112, it is quite similar
Check for possible false contacts
I hope you can solve the problem
Greetings Franco Dosil
Hola Redman, te envio el link para que descargues el service manual del modelo B112, es bastante similar
Revisa posibles falsos contactos
Espero puedas resolver el problema
Saludos Franco Dosil
https://elektrotanya.com/behringer_eurolive_b112d_sm.pdf/download.htmlhttp://www.uns.nu/pdf/Behringer_Speaker_B115D.pdf
Sounds like an earthing problem , check your cables and make sure none of the cables have strands that could be shorting down to earth causing the buzz
Mackie will send schematics free-o-charge BUT surface mounted electronic components are no cakewalk to repair. If's it's a fuse, cool but if not it may be best sending it to the pro's for repair.
I think the fault is in the power amp section, since it's not affected by the volume control. If this is a stereo amp and it's accross both channels then it must be a part that is connected to both. Such as a Power Amp IC. However if mono probably a transistor on the heat sink.
Need to know if turning down the master volume when it is making the noise stops the noise. If it does, the fault is in the preamp section, if not, it is in the power amp/power supply. Suspects are the power supply electrolytic capacitors.
It wont be fixed by friday
It appears a number of components have failed in the amp
If it's not the main transformer , you're looking at $200-300 for a fix
Can you please update this with the model number? You indicate that the caps look OK, do you mean physically or have you tested them? how they look deos not indicate whether or not they are defective. Please supply the model and I should be able to provide more details.
Question edited for clarity, typo and CAPS.
Question moved from Cars and Trucks category.
Claim on the warranty irrespective of how long you have had them. They charge $180 but they cost them $20 to buy from China. Package them up and send them tracked and ask them to replace the batteries.
How long is the warranty on AfterShokz?
While we hope you never need it, all new Shokz purchased from authorized retailers come with a two-year warranty that begins on your date of purchase.
Jan 11, 2019
