Toasted Pre

I don't know how it ever worked at all! I assume your current is 220, I was once supplied a 220 amp by a British company who didn't know the US voltage was 110 and it would not play. So apparently you have been feeding 220 volts into a preamp that was designed for 110. If this is the case it is a testament to its quality. I am still having a hard time understanding how it functioned for a year. What is your wall current?

I'm not sure I understand. Was the line voltage 110v or 220v? Were you using the correct step up/down transformer on the power line to which ever component didn't match the line voltage?

As long as both the pre and power amp each saw their specified voltages you shouldn't have a problem.

Please clarify.

Stanwal, Ghostrider45,

It seems I should not have mixed 220V with 110V in the same system.
Gabriel_37

Gabriel_37 profile says he lives in the USA. I believe he has a 240V power receptacle outlet for the amp and a 120V power receptacle outlet for the preamp.

That in itself would not cause the preamp problem. Might cause a slight buzz but not any damage, imo....

Looking at the pictures it almost looks like something like pop was spilled on the top and ran through the vent holes and caused electrical components and traces to arc and short out. Sure is a lot of black carbon around the burnt area in the pictures.

Either that or one hell of a lightning strike hit the preamp. If that were the case though I would think other audio equipment would have been damaged as well.

Or it could of just been an electrical component short out arc across and the rest is history....