some prelim results for the ipr2-7500. I'll do more official testing and pics when I get more time.
It will burst 3500w x2 @ 50hz into 2.3 ohms.
It will sustain 2500w total for about 10 seconds before tripping its breaker
It will sustain 4200w total for about 5 seconds before tripping its breaker
Things I noted:
The fans don't spin up when its under load. Seems to be a design flaw. After clearing the load, the fans then ramp up.
They don't have any real electronic protection, just a breaker at the back of the amp. I generally see this trip, then see some possible protection in the form of muting after I turn it back on. I think I saw it mute once without tripping the breaker, but I just happened to cut the signal right before the breaker tripped.
The outputs are already bridged, so no more bridging is possible.
While not a bad amp, I'd still go for a clone at about the same price, they perform better into higher impedance loads, sustain more power, have more burst potential, can be bridged, and don't shutdown as easily. On the flip side, this smokes the inuke 6000's, and it can drive a 2 ohm load and actually has some burst potential.
This amp can legit burst 7500w into 2 ohm loads.