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!
KEiiD Wooden Retro CD Player With Bluetooth, FM Radio, USB AUX Inputs, Speakers And Adjustable Bass/Treble For Home Stereo System And Boombox
27 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
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
SINGING WOOD Boombox Portable Bluetooth
9 Review