Buzz It all of a sudden became really noisy with a lot of buzz that seem to not go away. I was wondering what could be the cause of this. Thanks for your time!

2000 Falcon in Australia. sure. I am in USA , no cars like it here.
but all cars 2000 are KINDA the same, if Petrol fuel.
not told what all fails or does not fail, just the word buzz told
head lamps work ? bright, not dim, key on or off and driving?
car starts and runs and drives (the purpose of it)
all electrics work of some fail no told.
buzzing means mostly power failure.
is key off or on , buzzing
is engine running.
when any car main battery goes week , all computers in the car go mad(crazy) at 10vdc ( 12.6vdc is normal)
as the battery dies, the too low voltage caused the digital electronics to fail (not bad) they go partly off line 1 chip after the other)
and things buzz in fact may controllers self reboot endlessly as the power goes to this ******* stated. (out of spec)

if really curious learn to find out exactly what buzzes
fuses do no buzz but relays do , as the computers that run them fail at too low battery or the RELAY it self is bad.
some cars here have, 50+ fuses and 10 computer,
lots of things to fail is the word.

it might be a wire came away from the battery or the circuit board this will stop it from working

i probably wouldnt try souldering them because you have a high chance of melting that wire since it is extremely thin and its usually fiberoptic but you may have something frayed inside the input jack itself like a loose ground or a loose connection i would look their as well. When it comes to music i would throw away the input chords and buy new ones

its poor insulation on your power supply

We had the same problem - sound got quieter and quieter until Buzz was mute. My husband gave Buzz a sharp whack on his back where the AAA battery compartment is located and Voila - Buzz is speaking again.

Usally a ground loop isolator will fix that problem. It plugs into the RCA's between the radio and the amp.

Try to reground the amp in a different spot.

Or run a refrence ground from the deck to the amp next to the remote turn on wire. (still keep your main amp ground hooked up)

DO NOT run your power wire next to the RCA's, that will induce a field which in turn can cause that buzzing sound.

It sounds like the mic has a bad ground.

This could either be in the connector at the end, or the cord itself.

Best way is with balanced audio lines. Use either XLR or TRS cables IF your devices have those connections.

Also, do NOT use light dimmers as these are often a source of the higher frequencies that cause buzz.

Also power ALL the interconnected audio devices from a single source outlet rrather than from mulltiple building receptacles.

Buzzing nois of this kind can come from a short or from disturbance.

sounds like just a vibration caused by cols hitting the frame perhaps, sometimes a pull from underneath the unit on the condenser coils will rectify the problem(id give a pretty quick tug, . unit could just be settling into the floor or the house settling around it, vibrations are definitely annoying but usually no need for alarm