Get a hum out of the speakers with or without music

There are many causes of buzz, so it should be checked step by step :
- Bad connection on the input connector, or cord.
- Amplifier, basically have the block diagram like this. View image.
If in one block damage, buzz can be heard.In the amplifier.
Generally occurs in the PSU and / or power amplifiers.
Fix it to the experts,because it requires a good knowledge of electronics.
Blown speaker cone, does not cause a buzz.
Short circuit along the wires supplying the audio, it will not cause any sound in the speakers, including the sound of music.
Try also, disconnect the input connector, whether the buzz is still audible. If after the input connector is removed, the buzz disappears, the possibility of buzz came from another device before the amplifier.

Open the cabinet (remove back panel). Either a wire came loose or one of those 2 speakers is blown.

AC hum comes from poor grounding of components.

Incorrect connections or volume settings.

• In powering up, mixer first then amp

• In turning off , amp first then mixer


If hum still persist, without the mixer connected

then speaker amp may need servicing.

black and red will goto 1 speaker. and blue/yellow to the other. typically red and yellow are + and black and blue are -. the crossover board might tell you which is which where they solder to it. but i'm pretty sure the black/red goto woofer. try hooking up both to woofer and listen to it. 1 way is going to sound horribly wrong lol. that will mean you hooked up the tweeter leads to the woofer. but DO NOT HOOK UP WOOFER LEADS TO TWEETER. thats why i say to do it on woofer.

Hi,

The black wire is ground and the red is live, also the yellow is live and the blue is ground. Probably the black and red wires go to the woofer.



Regards.

Way to find out: The minus speaker leads go to ground at the amp and therefore are electricaally connected together... just use an ohmmeter to find which two wires are tied together and connect those to the minus leads of the speakers.

The grill on these is hard rto dislodge.

There are a couple little screws to remove. Then you have to be fairly aggressive to get the lip of the screen dislodged. start at the center of the SHORT edges and pry under in the middle. The edge of the screen goes into a grove with rubber on the side.

Note, some of these MAY have adequate access by removing the socket where the unit can set on a pole.
You MAY be able to manuever the plug and possibly lockwaser into place. Use a stiff wire with a small bent hook to capture the plug and pull i back through.

That is happening because your grounds went bad. Without grounds, then the amp will produce a buzzing sound. I would replace the input wire, that is probably the problem

If you are saying that you are plugging a guitar cord into an input on an amp without the guitar on the other end and you are getting a hum or buzz with the volume turned up ; that is normal. If you are getting the same results with a guitar plugged in it means the ground wire to your output jack on your guitar is broken. Check your cord with a volt ohm meter for continuity on the tip on one end to the tip on the other end. Do this for the sleeve on one end to the other. If you were getting the buzz without a cable it would mean that your input jack in your amp has a broken ground connection. Hope this helps.