HERES THE DEAL, BACK IN THE DAY ON REGULAR CABLE AND SHIT YOU COULD SUBSCRIBE TO HBO, SHOWTIME, AND CINEMAX, AND THOSE CHANNELS WHERE LIKE 25, 24, AND 23, WELL SINCE THOSE FILTERS CAME OUT AND EVERYONE COULD GET THEM, THEY SWITCHED HBO, SHOWTIME, AND CINEMAX TO CHANNELS IN THE 500'S SO YOU HAD TO ORDER DIGITAL CABLE TO BE ABLE TO USE YOUR FILTER, CAUSE YOUR REGULAR TV CANT GO INTO THE 500'S ON CHANNELS, YOU FEEL ME? SO IF YOU GOT DIGITAL CABLE YOUR FILTER WILL WORK, I HAVE ONE OF THE FILTERS, THAT FILTERS THEM ALL, HBO, CINEMAX AND SHOWTIME, ITS SICK, I PICKED IT UP OFF MY BUDDY FOR FREE, CAUSE HE USED IT BACK IN THE DAY BUT HE DOESN'T HAVE DIGITAL CABLE NOW AND I DO SO IT WAS LIKE THAT, BUT IF YOU CAN GET YOUR HANDS ON ONE, GET IT, THEY ARE SICK!