I’m guessing it’ll do 1500-1800 rms at 1 ohm. Cheap entry level that produces power so for $150 not bad price per watt if you want to stay on a tight budget.
I thought the same but that 4500 I think had 160 amps of fusing and this 3500 has 200 amps. I could be wrong, but I think the 3500 listed is a newer model then the 4500.