Everything else I know of was mentioned above, except:
Pioneer
Onkyo
Elac
RBH Sound (which only sells separates-type subwoofer amps with regard to electronics... except they do also have a nice little 2-channel amp that serves as a less expensive alternative to something like PS Audio's Sprout.)
Pioneer
Onkyo
Elac
RBH Sound (which only sells separates-type subwoofer amps with regard to electronics... except they do also have a nice little 2-channel amp that serves as a less expensive alternative to something like PS Audio's Sprout.)