Subwoofer

[TigerBotes]

Logitech subwoofer

How to connect the subwoofer without the controller

 

[Audioguru]

Many Logitech 3 speakers sound systems have a small woofer that has the amplifier built into it.
The woofer speaker is too small and too cheap to play deep subwoofer sounds but you can connect it to another amplifier to hear it.