It appears the new Pass A25 has "one ohm" potential. 100 watts at 2 ohms, 200 watts at one ohm. The hockey puck transistors have very high power dissipation.
H2O amps were a bit of a boutique class D in the day for Apogees, especially Scintilla. Vince from Sacto (now deceased) was a rabid promotional fan. It seems the modules and topology were changed frequently with constant upgrade-itis, but that was several years ago.
I heard them on Vince's Scintillas, but he was badgering us to fall down in worship. I thought they sounded OK, but not necessarily revelatory.
The question is somewhat meaningless without a spec for power required. Many amps will drive 1 ohm at low power; even tubes. What are you trying to drive?
The question is somewhat meaningless without a spec for power required. Many amps will drive 1 ohm at low power; even tubes. What are you trying to drive?