I don’t know why, but television is always louder during the commercials. It’s like there was some deal that was made a long time ago, so the user has to constantly turn their volume up and down.

Fortunately, the Gefen TV Auto Volume Stabilizer has come along. The user plugs the stabilizer’s input port to the TV’s audio output port, and then the sound passes through a very constant level through the Gefen box before heading out the speaker.

This box can be connected to the DVD player, Blu-ray player, and other multimedia sources.

You should be able to get it for about $179.

Source