WHAT THE..... Single band parametric equalizer?

[Torquem 10+ year member]

Sometimes a subsonic filter is followed by this type of EQ, in that case you can set it just beneath your tuning frequency of your vented enclosure to control cone motion once the enclosure unloads so that you can apply more power at the tuning frequency.
If you are using a small sealed enclosure, you can use it to boost the lowest, least efficient frequencies if the driver can handle the added excursion or the upper bass 40 - 50hz if you have a large, sealed enclosure that is lacking in upper output.

Lastly, if your EQ allows you to cut by any amount, you can use it to remove boomy bass that sounds like a one-note type of thing.

It's all up to you. Just know that when you boost frequency response, you are placing large demands on the amplifier's output capabilities and you risk clipping.

that makes perfect sense to me now. I really appreciate the info!

 

[ciaonzo 5,000+ posts]

i don't like it when shit gets too complex. But if you want then please enlighten us so that perhaps we can all learn....if my ADD doesn't kick in first.

Greatly simplified, the tuning of a vented enclosure is just a targeted resonance (Fb). The purpose is to create damping for the driver at it's resonance (Fs) to control/relieve cone motion and keep impedance in check.

A sealed enclosure has a resonance also (Fc). That would be the tuning. You change the tuning by increasing/decreasing the actual/apparent volume of the enclosure. If the enclosure has a compliance larger than that of the driver's (IB), the driver's resonance (Fs) is the dominant factor. If the enclosure has a compliance smaller than that of the driver's by a certain amount, the resonance of the enclosure (Fc) becomes the dominant factor.

Again, there's more to it but hopefully that helps.