I have spent many hours troubleshooting noise and subwoofer level issues in my 2 channel home audio system. I installed two of these (one for each channel due to the spacing between my monoblock amps - you only need one if you're dealing with a stereo amp). As others have pointed out, manufacturing with thin wires etc seems very flimsy, but they work!
π΅ Oakcastle BX200 Boombox, Portable CD Player and FM Radio with Bluetooth Stereo Speakers and Multi-Connection Capability
9 Review
SINGING WOOD Boombox Portable Bluetooth
9 Review
KEiiD Bluetooth Stereo Shelf System With Retro CD Player, Speakers, FM Radio Receiver, USB, AUX, Bass/Treble EQ, Wooden CD Music Bookshelf System For Home Audio
28 Review
π§ Jaras JJ-Box89: Red/Black Sport Portable Stereo CD Player with AM/FM Radio & Headphone Jack Plug - Ultimate Music Companion on the Go!
10 Review