I spoke with the K&H USA Rep who has informed me that the monitors are NOT switchable, and switching fuses around will not alter anything either. From what he’s explained, the O300D have linear amps (?) that have been specifically tuned to the voltage at which they will be operating, therefore the power supply will only accept that voltage. It is possible to use a step-up X-former, but the maximum Watt-rating needs to exceed the total peak output of the monitor (which in this case is 435 Watts). I think musicians-gear.com sells two ratings (300W and 1000W), so I may purchase the set-up x-formers through them and the monitors through
www.thomann.de.
Djui5 you mentioned that your O300D K&H monitors are switchable. Are you sure about this? The US K&H rep has informed me otherwise. Please advise.
Thank You.