digital amplifiers HA 450,HA550,HA650,HA800,HA900,HA1000 1.Slew ... 2.standard 3-pole connector 3.damping factor>600 digital amplifiers HA 450,HA550,HA650,HA800,HA900,HA1000 feature:HA ... wideband10Hz-30Hz damping factor>600 slew rate40V/us signal to noise ration105dB/A weighting THD+N<0.1% DIM<0. ... advice for speaker box will be offered freely. digital amplifiers HA 450,HA550,HA650,HA800,HA900,HA1000