Logitech Z3e vs Logitech Z4 2.1 system sound & bass test - YouTube
Logitech Z-4 2.1 Speaker System, 40 W RMS - Walmart.com
Amazon.com: Logitech Z625 Powerful THX® Certified 2.1 Speaker System with Optical Input & Bluetooth Audio Adapter for Bluetooth Streaming : Electronics
Testbericht: Logitech Z-4 / Z4 2.1 Lautsprecher für den PC – @GillyBerlin