need help reading this

ok the title is going to be off becaise i firgured out the thing i needed. but here is my question. Is Helix The only company that makes Flat Amps because they look so bad ass but the Class d ones only go up to like 800 rms and the class A one goes up to 1k rms

helix is a high-end brand ..... and plate amps used to be popular in the 80's