i have used this model of amplifier in several bands over the years, usually on subwoofer duties, it is a beast of an amp, especially for its price tag, its built very solidly, bulletproof operation, 4 ohm per side stable at 1200 watts per side.
normal use for me has been with a pair of 8 ohm subs (650 watts per side) which supplies some nice pounding sub bass, have used it doubled up on each channel with 2 subs on each channel pushing the full 1200 watts a side, A BEAST!
In my last band we used 2 of these monsters, all channels on 8 ohm subwoofer loads, 2600 true watts of sub, with headroom to turn up more if we wanted.
only 1 downside to these amps, they are heavy!, but at the price tag they represent fantastic value for money.
in my time playing with different bands i have seen these in use many times, everyone i have spoke to about this product says how good and reliable they are, ive only ever experienced 1 fault occur in over 6 years of using these amps, the amp in question was long out of guarentee and was repaired locally for around £40