Summina Professional Single Channel Passive DI-Box Hum Eliminator Direct Injecti

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

EBTech Hum Eliminator 2-Channel Stereo AC Hum Eliminator 1/4" TRS Jacks

Rocktron Hush Super C Stereo Noise Reduction Rack Unit Made in USA

2-Pack Behringer MicroHD HD400 2-channel Hum Destroyer Value Bundle

Rocktron RX2H 2-Channel Exciter/Imager/Hush II Vintage 1U Rack - Tested works

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

GINTOOYUN Pro Passive Stereo Direct Connection Box 2-Channel Audio black