I bought this unit (S1102249ABB) a little more than 1 year ago and I'm using it to drive a 12" mid bass unit rated 500RMS/1000 Max.
In this days I measured its power ratings using my "real" test scenario; 3m cable from the wall outlet to a power strip on the rack and then a 1m power cord to connect the amplifier.I'm using 4 x 2Ohm 50W Arcol resistors in series for each channel (so 200W per channel) , which are able to handle an overload of 5x their rating with the test procedure I'm using. The test consists in running a 3s On and 18s Fff 100Hz sin wave; the amplifier delivered around 450W RMS @8Ohm and around 740W RMS @4Ohm. Because I'm not able to do the 2Ohm test, due to the combination of the resistors, for which however I was expecting 1000W RMS per channel, I did the 4Ohm bridged test.
With a big surprise the amplifier was not able to go over 74V RMS on 4Ohm, which translate into 1370W, because as you try to go further the amplifier goes into protection ...
I tried also with a 100ms On and 1s cycle but nothing change.
This happens also with the amplifier completely cold.
At that level the main dropped from around 235 to 227...
My impression is that there is something wrong in the protection regulation cuircuitery and/or something wrong with the unit.