Metal cones can ring like a bell if not treated perfectly; plastic cones can have a "hollow" coloration. But the SPP cone on this JL driver hits the sweet spot. It has a stiffness that keeps the bass tight, but a porous, fibrous quality that eats up resonances before they can muddy the midrange. It’s the acoustic equivalent of a high-end leather jacket—supple yet durable.
The primary audio driver installed correctly, but the data-transfer (SPP) component did not. How to Install or Fix the JL_SPP Driver jl-spp driver
This is especially useful when deploying on multiple embedded Windows devices. Metal cones can ring like a bell if