Mk110 input signal question

i have a mk110 and wish to use it to power some lights. To get any response out of it, I found I needed about 2volts from my speakers/stereo. To achieve this I need to have it on almost full volume which isn’t very neighbour frendly. Can you suggest an amplifier kit to boost the signal from my speakers/stereo, or a more suitable light organ kit please?

The stereo is rated at 50W max, 40W RMS per channel and the speakers run on 6 ohm impedence

K8017 might be a better option.
It features microphone input.