Has anyone here had any experience resetting the internal power switch on an any of the Aguilar amplifiers. I just purchased a DB659 preamp (the power plug is apparently the same between all of the Aguilar amps). I live in Hong Kong where the voltage is 220VAC. The unit I purchased is set to 120VAC ... but it appears that there is a jumper in the rear that will allow me to set this to 220VAC, and the specs note that the DB659 is internally switchable to 220vac. Has anyone here made a switch in input voltage? How is this done? Also, the power indicator bulb on the front panel has burnt out. I've pulled this out, but can't tell from the bulb what the voltage is. I'm presuming that this is 12volt (that's probably a standard for a panel indicator bulb) but would like confirmation before replacing it, if anyone has experience with this.