On top of this, the parametric eq in the picture is cutting valuable frequencies even above the stated 40hz and is even slightly affecting up to 130hz, which is nonsense. Not only can we hear downwards of 25 or even hear 20hz, many headphones and good speakers will have a frequency range travelling well below 40hz. Tip 1: Cutting below 40hz is barbaric in many genres. This article really misinforms readers, and here's why: I believe when writing for a big website such as this one, it's very important to be accurate, as people can get stuck with 'tips' on the net for a long time, delaying their production skills. I don't wish to hate, but I think constructive criticism is necessary here.