I work in Broadview otherwise midway is about 45-1hr from me.
Refs see diymobileaudio.com under same username (itrader and other feedback).
Someone asked me to post internals. These are not of my exact amp but they are the internals of this model. It's a beefier lanzar opti400.4 digital series. I suspect possibly designed by ZED but he would never admit to it and I have no proof. The BB1250.1 shares the same guts as a lanzar vibe 1200.1 made around the timeframe he was designing for lanzar /boss/pa.
Again these are not my exact photos, I found them on DIYMA. 2 pairs of fets per channel, I think 8 fets in the power supply and I roughly verified it can do 600W bridged becasue everyone always asks. I use one for my midbass bridged to each side.