diy built in channels class A amplifier based on krell ksa 100 mk2 but with new design and better components arrangement on pcb. vumetres level adjustable. protection output. krell case. 1.2 kva toroidal double rectifiers 47000uf x4.amazing bass control.100 watts class A biased 500 mv.as i cannot upload video using ebay app video demo is available on my fb profile page. ask for link. collection co155ru payment cash on pick up only please any questions please ask before purchase