some require ac but internally they always(?) convert it back to DC using rectifiers /diodes
has anyone ever fried a device with dc in place of ac
i have always put dc powersupply/adapter (smps based) on these router which require AC voltage
for eg 9V 1 Amp ac gets 10V 1 amp dc
15v 1 Amp ac to 12 v 1amp dc
basically trying to keep wattage in limited range
{limited range as in if you deviate too much then excess heat EMI radiation pcb overheat will shorten life of components like capacitors and since devices are on 24X7 life expectancy is in months if not cooled}
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[b]watts = amps X volts[/b]
and ac supply is done mostly by cheap manufacturers by using a transformer , makes adapters heavy
dc adapters are light because they use smps based components and run cooler
has any one any input on this