Matty Neutrona and Lepai Ampli ,problems

Hi folks!!

I have connected the cables that were going to the small loudspeaker of Matty’s neutrona at the entry of the amplifier lepai. The problem is that I cannot give him very much volume to the amplifier by which it is listened cut off, just now I have it in less than the half of power. Not that I have done badly. ¿ Can you help?

Thanks Salutes from Ghostbuster Spanish divison