It looks like you're new here. If you want to get involved, click one of these buttons!
Vintage speaker designs, such as JBLs, encorporated L-pad designs to provide user integration into a specific room environment / preference.
Been playing around with a contour circuit (coil with parallel adjustable resistor, aka one path of L-pad). The full adjustment range is ~3dB, the pic is at approx 1/3rd and 2/3rd rotations.