Wanted with the MA400 actually a Tube Amplifier-Eigenbau I bought used on E-bay 3 years ago for 250Euro replaced but after a brief Compare I'm amazed at how thin it sounds the MA400. Voices are weak, somehow not particularly impressive, no pressure in the bass. Ok, for 320Euro you can not expect miracles, but had based the reviews just expected more. Am not an expert but even I notice the difference significantly on. Mag maybe my boxes are (JBL L220) but that's nothing. ==> MA 400 goes back and DIY will remain until his blessed end.