powerline filter with prongs

[LaserTazerPhaser]

Is there a power line filter similar to this https://www.amazon.com/dp/B073RLXRPB but with prongs which go straight into a wall outlet instead of solder lugs? This is for a mains powered speaker which is noisy on mic input setting.

I tried wraping the mic cord into 2 ferrite torroids at different ends and the power cord with a ferrite rod but it seems there simply isn't enough inductance to remove the noise or its not an issue from the power line. There are several products available on amazon which claim to filter mains power but they don't list any of the reactive filter elements inside nor the noise attenuation - digikey seems to only have solder lugs and module filters.

[bob91343]

Just how sure are you that a filter on the power line is what you need?  What is the noise you are hearing?

I have several power line filters in my junk box and have never found the need for them.  They have come from things like copy machines, PC monitors, printers, and such.  Being small, they don't have a lot of inductance and probably attenuate best in the HF range.

Some power strips have filtering inside.

If you insist on a box to plug in, you could build one.  Being a one-off you probably needn't worry about meeting electrical code requirements.

[LaserTazerPhaser]

Just how sure are you that a filter on the power line is what you need?  What is the noise you are hearing?

I have several power line filters in my junk box and have never found the need for them.  They have come from things like copy machines, PC monitors, printers, and such.  Being small, they don't have a lot of inductance and probably attenuate best in the HF range.

Some power strips have filtering inside.

If you insist on a box to plug in, you could build one.  Being a one-off you probably needn't worry about meeting electrical code requirements.

Noise emanates regardless of volume the mic channel is set to akin to whats known as static noise.

[soldar]

Noise emanates regardless of volume the mic channel is set to akin to whats known as static noise.

Could it be a ground loop problem?

https://en.wikipedia.org/wiki/Ground_loop_(electricity)

[bob91343]

If the gain does not affect the noise, it's probably a noisy component.

Someone gave me a Fender guitar amplifier that had loud noise in the output.  I replaced the offending 4558 chip and it's like a new amplifier, clean and quiet.