Sonicware Lofi-12 XT -Ltd Retro

great little machine. i like it a lot but it has one serius problem.
if i connect line outputs of lofi12xt to my monitor speakers (active monitor speakers) i hear loud noise level like i turned the volume knob of my soundcard to maximum. the line out volume of lo-fi 12 xt seems to be constantly on maximum level. the "value" knob seems to just make the sound engine volume lower and not the true output level.. "volume" knob controls only internal speaker and headphones output level. true overall volume of line outputs stays always on maximum level. it makes lofi12xt unusable as audio interface. user manual says that i can connect line outs to speakers but its not true. you can advice me tu turn the volume of my speakers down.. ok but its so amateur and lame. monitors has volume knob on the back and allways on same volume level in my case. its not a consumer multimedia speakers. when i connect proper soundcard to them i cant hear any noise untill i crank up the volume knob all the way to maximum. thats the proper behaviour.