Startechcom active ultra hd hdmi cable mm startechcom hdmm30ma the startechcom hdmm30ma active hdmi cable offers a connection distance of 30 metres between your hdmi devices the cable features built in amplifier circuitry which actively boosts your hdmi signal with no external power required its the perfect solution for longer transmissions without any signal loss and no external power supply it also meets cl2 safety requirements so its ideal for in wall cable runs in your home a