Not really...
After looking on their site I decided I'd like one of everything.
Would you be able to suggest one? Is there one that can do it's thing with speaker and line level inputs? Or is that plain crazy?
...equalizers are line level devices...your gear would need a "true" tape monitor loop...or a processor loop...or pre-out/power-in jacks...All but the second as rare as hen's teeth in HT stuff. One could, however, equalize a source...say a CDP...but that would be only one source and usually systems are equalized
as systems...
Most HT-centric gear does not allow for use of outboard equalizers due to the fact such devices can cause problems with the surround circuitry...many newer items have internal EQing, using self-generating test signals and microphones for proper set up...
I'm not aware of any EQs that will accept the higher levels of speaker outputs...
jimHJJ(...but then again, I wouldn't pretend to be familiar with everything that's out there...)