Truetone 1 Spot Voltage Doubler
Perfect little item for those unusual devices that will run on, say, 9 or 18 volts. I have a Snouse Black Box 2 Overdrive that will. In that device the higher voltage can create a massive deep bass tone. I really haven't explored the 9 versus 18 volt sound differences, though. For a simple device it is certainly expensive, but what can one do?