My two cents
Just replaced two behemoth Emotiva amps ( a 5channel and a 2 channel) in the ht rig with a tiny little Nuforce mca-20.
Now the tanks were rated at 5x200w and 2x300w and the Nuforce "just" 8x150w.
I am pleasantly surprised to say I am totally blown away...literally!
The Nuforce puts on quite a show and combined with my Rel Stentor sub (more class D) we are rocking the cabinets with a good action movie. Yes I know the Emotivas are not top flight stuff to begin with but still.
Now my stereo rig comprises of BAT VK600SE amp, 2x300w weighing in at 120lb.
Just bought a Red Dragon s500 to compare, basically i am going to sit it right next to the BAT and swap cables and see what I think
This will be interesting.......