Bought on Amazon, shipped quickly, built-in - picture and sound in good quality. Previously came an amplifier with smaller power before 6-way distributor of King used so that the TV only about 40% signal, the FM receiver anzeigten 65dB and now and then the conscious squares were briefly in the picture. After switching on the new amplifier, the signal was at 90%. the receiver shows 75dB. All controllers were on Max. (Right). The screws can be moved several turns. As mentioned in a review, on the bottom left of the frequency-dependent attenuation, right below total gain, right in the center of the back channel (I currently not needed). The two lower regulator I have taken back a little, so that the signal on the frequencies is approximately equal - would you perhaps can also leave on Max when no oversteer can be seen..