New Class H and Class TD Amplification designImproved power by 200 watts on two models2U Rack height for all models including the B4000Shorted chassis depth making it easier to rack mountUpgraded PSU toroidal transformer and filter capacitorsModern Anodised Aluminium faceplateFeatures and Protection:Mains Voltage displayPer Channel temperature displaySoft startSeamless automatic clip limitersIndependent thermal protection per ChannelMulti-stage variable speed forced air coolingShort circuit protectionThermal protectionDC protectionSpeakon outputsBalanced line XLR inputsDetachable mainsStereo, Parallel and Bridge mode operation