d&b D12 Hardware - Manual (Page 22)

When using the D12 at its upper temperature limit of 45 °C (113 °F),
the maximum continuous output power is 500 watts total or 250 watts
per channel. Again referring to section 6.2.1 - (Tab. 8) - the unit will
work properly with e.g. 400 watts total when either running 4 ohms
loads when the signal has a CF of 3.5 or running 8 ohms loads if the
worst case signal with a CF of 2.4 needs to be handled.
The maximum possible output power of 2 x 1200 W at 4 ohms, which
for thermal reason could only supplied in a short term (within minutes), is
unaffected by the ambient temperature.
6.2.3. Mains supply
Number of devices per phase conductor when full output power is
required.
Mains supply Number of devices
230 V / 16 A Max. 2
115/100 V / 15 A Max. 1
Tab. 9: Mains supply and number of devices
In the USA and Japan we recommend the operation over two phase
conductors (phase to phase – 240/200 V) or the use of mains leads
with a much higher cross section (min. 4 mm
2 / AWG 12).
D12 Amplifier, Hardware manual (4.9 EN) Page 22 of 28