Amp EQ Shelving Filters

[PraiseBassing]

Just trying to get a better understanding of these filters commonly found in eq’s. Is there some type of standardization for the corner frequency that is listed and slope for these in bass amps? Or is it dependant on the designer? I think the corner listed is usually the -3dB point, correct?

 

[ddnidd1]

The corner frequency and slope are specified by the designer.

The most common slope I've seen is 12 dB per octave.

 

[PraiseBassing]

The corner frequency and slope are specified by the designer.

The most common slope I've seen is 12 dB per octave.

You are thinking of a low pass or high pass.

 

[ddnidd1]

You are thinking of a low pass or high pass.

Actually I believe I'm referring to shelving filters.

EDIT: I just looked at some specs on my amps and the 12 dB reference is wrong.

 

[PraiseBassing]

Actually I believe I'm referring to shelving filters.

A high pass filter or a low-pass filter are forms of shelving filters

If you set a high pass filter with a slope of 12dB per octave at 80 hz; 40 will be -12, 20 -24, 10 -36, 5 -48, and so on.

A shelf will slope down to a certain point and then level out. This is the nature of a shelf that I am trying to gain understanding of.

 

[ddnidd1]

If you set a high pass filter with a slope of 12dB per octave at 80 hz; 40 will be -12, 20 -24, 10 -36, 5 -48, and so on.

A shelf will slope down to a certain point and then level out. This is the nature of a shelf that I am trying to gain understanding of.

You are correct. Time for the morning coffee.

 

[PraiseBassing]

You are correct. Time for the morning coffee.

I always enjoy more coffee!