I've done 1 Tsunami installation and 3 Econami installs . With the PowerCab you don't need any kind of booster to program them . What I usually do is to make sure the decoder is installed correctly by placing it on program track and changing the address . After that I do all of my programming on the main . I don't remember hearing any buzzing from the speakers , unless the speaker isn't in an enclosure , and then just about any sounds will be very week and buzzy.