Seismic Audio Passive DI Box Ground Lift Attenuator Switch SA-DI1
The attenuator switch pads down hot line-level sources so they don't overload the preamp on the other end. Both switches are there because you need them in real situations: a bass rig plugged into a house system in an old bar, a keyboard with line-level output running 75 feet to front-of-house, a DJ mixer feeding a wedding PA.