I have a different twist here. I sold my Odyssey Stratos for the HCA-2. The improvements over the Stratos are:
1. Much larger soundstage.
2. Better midbass.
3. Tighter more well defined lower bass.
A persons preference on one amp over the other will depend on a few factors. The type of speakers and preamp used. Whether or not the HCA-2 is used in balanced mode since the HCA-2 is a true balanced design, the Odyssey is not. Finally a couple of Odyssey Stratos reviewers on audioreview.com prefered the HCA-2 over the Stratos, personally I think they are both great amps but in different ways.
1. Much larger soundstage.
2. Better midbass.
3. Tighter more well defined lower bass.
A persons preference on one amp over the other will depend on a few factors. The type of speakers and preamp used. Whether or not the HCA-2 is used in balanced mode since the HCA-2 is a true balanced design, the Odyssey is not. Finally a couple of Odyssey Stratos reviewers on audioreview.com prefered the HCA-2 over the Stratos, personally I think they are both great amps but in different ways.