Monoprice 114528 4K&nbsp; HDMI 1X2 Splitter This splitter features an internal amplifier, which boosts the HDMI signal and allows the use of longer than normal HDMI cable runs. This splitter features an internal amplifier, which boosts the HDMI signal and allows the use of longer than normal HDMI cable runs. This splitter features an internal amplifier, which boosts the HDMI signal and allows the use of longer than normal HDMI cable runs.