Logitech 2.1 speaker system (Upton Park E7)

Logitech 2.1 speaker system. Connects to a headphone socket of a PC/TV/phone etc (headphone lead is attached to the unit, and it's the only option. Just fired it up and it seems to work. Finish is scuffed, it used to live under my desk but it's been in storage a while.

Subwoofer is large and heavy (see pictures with measuring tape).