I agree that with AG Duo's it is fractions of a Watt that are required in most situations. I have Duo Omegas and using an Atmasphere S30 OTL amp. This is fed directly from a Berkeley Alpha DAC. With the Atmasphere you can remove the driver tubes to reduce max power. With 5 tubes each side you get around 35W. The amp has an output dial that can show power per channel - at deafening levels the meter is barely moving so I reckon well less that half a Watt!
I have tried a number of amplifiers with the Duo's and all have been able to deliver excellent results, so I would expect the Pass amps to sound really good.
I have tried a number of amplifiers with the Duo's and all have been able to deliver excellent results, so I would expect the Pass amps to sound really good.