PEQ or shelf filter to block frequencies under 40hz?

[sean80]

Is it possible to create a PEQ or shelf filter to block frequencies under 40hz?

 

[harkpabst]

Due to their working principle neither a PEQ nor a shelf filter can efficiently block all frequencies below 40 Hz. That would require a high-pass filter. You could lower the level of frequencies below 40 Hz with a shelf filter or reduce frequencies around 40 Hz with a standard PEQ.

Why do you ask? What's your use case?

 

[sean80]

small single driver speaker. good idea with the PEQ roll off...just want to take some load off the 4 inch driver

 

[harkpabst]

A relatively low Q, high negative gain PEQ around 30 Hz or so might be better than nothing, in this case.

 

[Musician]

Is it possible to create a PEQ or shelf filter to block frequencies under 40hz?

Yes , this is very useful when using ported speakers .

Example :

in PEQ meny : using HP shelving , Q = 1.7 , gain -12 dB at the same frequency as the tuning of the port . Or HP shelving , Q=3 , gain -9 dB .

This way you get much better bass from your speaker .

Read more here :

https://audioxpress.com/files/attachment/2721