Replacement Audio Cable Compatible with Logitech 5.1 Channel Computer Speakers Color Coded 3.5mm Minijack 3 Male to 3 Male 6.5ft,Compatible with logitech z-5500, z-5450, z-5400, z-5300, z-906, z-680, - Newegg.com
Logitech Z5400 DIGITAL Owner's Manual | Manualzz
Amazon.com: Ancable Replacement Audio Cable for 5.1 Channel Logitech Computer Speakers 3.5mm 1/8 TRS Plug Male to Male 6ft,Compatible with logitech z-5500, z-5450, z-5400, z-5300, z-906, z-680, x540 etc. : Electronics
Remote Control For Logitech Z-5500 Z-680 Z-5400 Z-5450 Computer Speaker - Remote Control - AliExpress