@Mike, maybe your sound card drivers do not show a subwoofer speaker? It's hard to tell without knowing your hardware (i e alsa-info: https://wiki.ubuntu.com/Audio/AlsaInfo )
@Mike, maybe your sound card drivers do not show a subwoofer speaker? It's hard to tell without knowing your hardware (i e alsa-info: https:/ /wiki.ubuntu. com/Audio/ AlsaInfo )