I am in Chicago. I just got off the phone with Adant, the install contractor that will be doing my sytem on saturday. I asked about not using hte Diplexor and running 4 lines (getting two boxes) after a long hold he came back and said "the problem with the diplexer, was the one that is on the back of the voom box. we are using an outdoor diplexor and bypassing the voom one" he also said that people in chicago have had it done this way for a week or so and he has no reported problems. Also asked about over-amping the OTA signals because i am so close to the towers. he said "they will hook up the amp and if it causes problems they will remove it" - hope all go's well