-PRO Premium Direct Injection Audio Box - Passive DI Unit Hum W/ Input

Ultra-compact Hum Destroyer 2-channel Hum Eliminator Noise Filter 1/4 Inch F9P8

Behringer Micro HD400 Ultra-Compact 2-Channel Hum Destroyer Untested

Pyle PHE400 2-Channel Hum Eliminator Ground Loop Noise Filter XLR 1/4" TRS

-PRO Compact Mini Hum Eliminator Box-2 Channel Passive Ground Loop Isolator, Noi

Pyle PHE400 2-Channel Hum Eliminator Ground Loop Noise Filter XLR 1/4" TRS

-PRO Premium Direct Injection Audio Box - Passive DI Unit Hum Eliminator W/ Inpu