Speakers buzzing help?

[L.V]

Would it be my amp is dying?
Ive had it for 4 years (machete 80.4)
The speakers buzz at any volume, any mode (AM/FM bluetooth, USB) I have done the big 3 upgrade. All wires are OFC wire from amps to speakers. The sub is just fine but all channels off the 4channel amp buzz.
Heres the kicker and what I cant find an answer to. The buzzing completely stops when its on LPF setting… HPF or Lp/Hp filters the buzzing comes back.

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[Jimi77 5,000+ posts]

LPF is filtering out high frequency buzz??? Check grounds and connections. Does it buzz when the engine isn't running?

 

[L.V]

LPF is filtering out high frequency buzz??? Check grounds and connections. Does it buzz when the engine isn't running?

Yes, it buzzes engine off and all grounds are good. I have tested them several times

 

[Jimi77 5,000+ posts]

Yes, it buzzes engine off and all grounds are good. I have tested them several times

Try a new source, such as your phone via the 3.5mm headphone jack.

 

[dragon.breath 10+ year member]

Try removing the rca cables from the amplifier and then turning it on. If the noise goes away, it is not the amplifier or speaker wiring, and you have a head unit or rca wiring problem.
If the noise is still there without the rcas connected, then the amplifier, or wiring is bad.

 

[audiobaun 5,000+ posts]

What HU are you running?? Curious. Very well could be RCAs or the HU

 

[L.V]

Try a new source, such as your phone via the 3.5mm headphone jack.

Same thing happens

 

[L.V]

Try removing the rca cables from the amplifier and then turning it on. If the noise goes away, it is not the amplifier or speaker wiring, and you have a head unit or rca wiring problem.
If the noise is still there without the rcas connected, then the amplifier, or wiring is bad.

The buzz does go away when i disconnect the RCAs.

 

[L.V]

What HU are you running?? Curious. Very well could be RCAs or the HU

I just ran new RCAs and installed a AC DSP. The HU is a XAVAX1000

 

[L.V]

One thing that is also making no sense. When putting pressure on the gain adjustment knobs or any subsequent adjustments on the amp. The buzz will increase or decrease, again just pressing or wiggling the knobs and not turning will change the severity of the buzz. Any ideas?

 

[Jimi77 5,000+ posts]

One thing that is also making no sense. When putting pressure on the gain adjustment knobs or any subsequent adjustments on the amp. The buzz will increase or decrease, again just pressing or wiggling the knobs and not turning will change the severity of the buzz. Any ideas?

Seen that before. My guess is the connection/s between the preamp/input board and the main board are failing.

 

[L.V]

Seen that before. My guess is the connection/s between the preamp/input board and the main board are failing.

I am very familiar with soldering and electronics. Would that be something I can go in there and fix?

 

[Jimi77 5,000+ posts]

I am very familiar with soldering and electronics. Would that be something I can go in there and fix?

It could be something you could fix. Typically bad solder joints. Good luck.

 

[audiobaun 5,000+ posts]

One thing that is also making no sense. When putting pressure on the gain adjustment knobs or any subsequent adjustments on the amp. The buzz will increase or decrease, again just pressing or wiggling the knobs and not turning will change the severity of the buzz. Any ideas?

If you are having that kind of issue with noise when tuning.. and If the amplifier is still under warranty.. Id send it back for a replacement or repair. If not .. get some can air and spray to tuning pods and work them up and down several times. Sometimes it helps get dust ect cleared out. But May need to be replaced on the board

 

[audiobaun 5,000+ posts]

I forgot.. you have had the amp for four years.. No warranty applies after 1 year on most electronics these days