Re: Power adaptors are always useful
"If the gizmo says 12v / 1A , and your psu says 12v / 5A - it wont blow it up"
If the psu is not regulated then it is probably going to deliver a much higher voltage to a device which has a lower current draw.
These psus are calculated to deliver the correct voltage at the stated current through the psu's inherent internal resistance. Even if the device has its own built-in regulator - the extra heat dissipation from the excess voltage may soon kill it.