I made a balanced TRS to unbalanced RCA + balanced TRS splitter box so I can hook my sub up with my monitors : r/diysound
Amazon.com: Cubilux 5-Way 1/4 Inch Stereo Audio Splitter Box, Passive Multi 6.35mm Headphone Splitter, 5-Channel Quarter Inch TRS TS Aux Splitter for Guitar Keyboard, Live Show, Studio & DJ Monitor : Electronics
ART SPLITMix4 | Bax Music
Amazon.com: Cubilux Passive 6.35mm Headphones Splitter Box, 1/4” Stereo Multi Audio Distributor, Multiport Quarter Inch TRS TS Aux Splitter for Guitar Signal, Studio Recording, Live Performance, Monitors : Electronics
Y Splitters - - TRS Y Splitter Box
Amazon.com: Cubilux 5-Way 6.35mm Stereo Audio Splitter with Switch, Passive Multi 1/4” AUX Switcher, Quarter Inch TRS Splitter Box/HUB for Instrument Cable, Headphones, Speaker, Guitar, Keyboard, Pedal : Electronics