Could be you need to change your current Class D () amplifier. Yes, I know Class D is switch mode amplifier. Less heat wasted, more current to the amplifier.
Still take a look at the 1120, then you’ll see the build quality is much better.
This is not my expertise, so perhaps I should let other forum members reply.
Still, the Rotel transformer. The Rotel wins.
Because the rotel is bigger more expensive ?