Great help from Tim when I asked if the headphone amplifier would work on my older flat screen Samsung. He checked and said it would. The amp arrived all the way to me in Hawaii, with no added shipping charge added. Plugged it into the audio output and it worked perfectly. No hum, volume knob feels very solid as does the whole amp even though it is made in China. It's nice to find a vendor who actually knows the product they are selling.