IPR2-7500 2 ohm numbers. These are pretty impressive, though I would like to see more burst in the LF range. Excellent efficiency numbers and great sustained power. That said, the fans are noisy and the price is a little high for what you get.
I'd go with the Prolite 7.5 over this as it's basically the same amp with larger capacitors (7200uF) and is $50 cheaper at B&H.
2.2 ohms - 4kw single channel, 5kw two channels into
4.5 ohms - 2.5kw single channel, 3.7kw two channel into
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 all the way when its under heavy 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.
3v of switching noise at 349khz
1ch driven into 2.2r
2ch driven into 2.2r
1ch into 4.5r
2ch into 4.5r
1ch into 9r
2ch into 9r
This is a 100hz signal, you can see how little burst it has. I should have zoomed in on this more to make it easier to see, sorry.
pink: output signal
purple - power
blue - current
yellow - voltage
Distortion numbers 6db below clipping into 2 ohms