I be have difficulty view several channel after my antenna signal go through a passive 3-way splitter . the connection off the splitter provide weak reception on channel 4 and no channel 4 reception to a tv in another room feed through a 50 foot extension cable . after I replace the passive splitter with the dba-s4 , the reception be vastly improve . you need to supply you own coax cable to connect the power supply to the drop amp . you also need to supply you own f-type terminator for unused port .