very little power?


Hi everyone, just installed my mcintosh mx122 and mc207 to my front projector,cable box (Fios), dvd player, cd player, etc. When I play dvds or cds the sound is strong and powerful like it should be but when I play TV I get like 1/5 th the power and sound levels. I have checked all my connections but cannot figure out why everything works but the TV portion. Any suggestions or clues to what may be going on? Any help would be greatly appreciated. Thanks in advance.
flognam
I have now tried any and all connections to no end. i have spoken with verizon fios and have changed box and went directley through pass through mode as well as a pcm mode and  still no real volume. Blu ray player works fine as well as cd player and second dvd player just not cable box. Any other suggestions ? Thanks.
What is the make/model of the cable box that you are using? Have you checked, as @oddiofyl suggested, as to whether your cable box has a remote controlled volume output? Many do!
i have checked and put at max volume also went into advanced settings and tried to use pass through mode and pcm mode as well cable box is an Arris ipc 1100
Also check to see if box has DRC  dynamic range control , turn it off if so equipped.
Cable box is a pain in the Arris......unfortunately comcast dumbed everything down and disabled variable digital out .   It convenient, but they got too many complaints of no sound .   Yours may not even have it.  My TV is quite a bit lower than my tuner, DAC , even phono....   I just live with it.  

Dynamic range enabled on cable , dvd, Blu-ray will sound poor on a good system.  It is to compensate for crappy systems and sound bars.