Logitech X530 Subwoofer Mod - turn it into an active sub without the control speaker - YouTube
Amazon.com: 3.5mm Audio Cable for Logitech G635 Gaming Headset/Xbox One/ PS4 and Logitech G Pro,G Pro X,G633,G933,G433 Gaming Headset (Upgraded) : Video Games
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
DIY Logitech X-530 5.1 speaker to standalone MP3 Player Bluetooth Conversion / Hack Part 2 - YouTube