Pyle Hum Noise Filter Eliminator Destroyer Stop Hum Noise with TRS Inputs and Outputs 2-Channel For Guitar Pedals , Speakers Ac Adapter No More Hum (PHE300) by PylePro

PYLE-PRO Compact Mini Hum Eliminator Box-2 Channel Passive Ground Loop Isolator, Noise Filter, AC Buzz Destroyer, Hum Killer w/ 2 1/4-Inch TRS Input and Output for 2 Mono /1 Stereo Signal

Pyle Premium Direct Injection Audio Box - 2.36" x 4.09" Passive DI Unit Hum Eliminator w/ Input Attenuator to Connect Guitar & Bass, 1/4'' Impedance Transformer Connector to Balanced & Unbalanced XLR