Does anyone know anything about the tests of the Arcam AVR 300 shown at http://www.milleraudioresearch.com/avtech/index.html ? This seems to show much less power available at 4 ohms than one would expect. (Open the AVR 300 review and search for "fail")
If you check the dates of the report you will find they are April 2004 - the measurements were made on a very early sample of the AVR300, before it hit the market.
Production units had the output stages' protection locii opened up which would have made a big difference to these figures. IIRC the 4 ohms dynamic power output measurements were also done on the 8 ohms setting which is not really representative of how the unit would be used in practice.
The bottom line is that this is not an issue - but well spotted